/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ss2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:25:20,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:25:20,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:25:20,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:25:20,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:25:20,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:25:20,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:25:20,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:25:20,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:25:20,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:25:20,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:25:20,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:25:20,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:25:20,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:25:20,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:25:20,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:25:20,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:25:20,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:25:20,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:25:20,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:25:20,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:25:20,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:25:20,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:25:20,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:25:20,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:25:20,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:25:20,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:25:20,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:25:20,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:25:20,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:25:20,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:25:20,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:25:20,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:25:20,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:25:20,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:25:20,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:25:20,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:25:20,657 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:25:20,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:25:20,658 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:25:20,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:25:20,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:25:20,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:25:20,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:25:20,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:25:20,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:25:20,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:25:20,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:25:20,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:25:20,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:25:20,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:25:20,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:25:20,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:25:20,883 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:25:20,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss2.c [2022-01-09 23:25:20,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abee3e8b/cc8fec0510e14888bdddecf9a154c63b/FLAG302f0c051 [2022-01-09 23:25:21,233 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:25:21,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss2.c [2022-01-09 23:25:21,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abee3e8b/cc8fec0510e14888bdddecf9a154c63b/FLAG302f0c051 [2022-01-09 23:25:21,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abee3e8b/cc8fec0510e14888bdddecf9a154c63b [2022-01-09 23:25:21,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:25:21,673 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:25:21,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:25:21,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:25:21,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:25:21,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d3911e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21, skipping insertion in model container [2022-01-09 23:25:21,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:25:21,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:25:21,811 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss2.c[586,599] [2022-01-09 23:25:21,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:25:21,858 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:25:21,874 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss2.c[586,599] [2022-01-09 23:25:21,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:25:21,912 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:25:21,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21 WrapperNode [2022-01-09 23:25:21,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:25:21,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:25:21,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:25:21,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:25:21,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,961 INFO L137 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-01-09 23:25:21,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:25:21,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:25:21,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:25:21,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:25:21,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:21,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:25:21,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:25:21,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:25:21,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:25:21,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (1/1) ... [2022-01-09 23:25:22,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:25:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:25:22,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 23:25:22,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:25:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:25:22,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:25:22,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:25:22,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:25:22,119 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:25:22,120 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:25:22,240 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:25:22,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:25:22,245 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-01-09 23:25:22,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:25:22 BoogieIcfgContainer [2022-01-09 23:25:22,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:25:22,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:25:22,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:25:22,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:25:22,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:25:21" (1/3) ... [2022-01-09 23:25:22,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4d265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:25:22, skipping insertion in model container [2022-01-09 23:25:22,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:25:21" (2/3) ... [2022-01-09 23:25:22,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4d265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:25:22, skipping insertion in model container [2022-01-09 23:25:22,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:25:22" (3/3) ... [2022-01-09 23:25:22,253 INFO L111 eAbstractionObserver]: Analyzing ICFG ss2.c [2022-01-09 23:25:22,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:25:22,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:25:22,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:25:22,300 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 23:25:22,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:25:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:25:22,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:22,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:22,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -642180410, now seen corresponding path program 1 times [2022-01-09 23:25:22,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:22,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248368537] [2022-01-09 23:25:22,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:22,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:25:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:25:22,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:25:22,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248368537] [2022-01-09 23:25:22,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248368537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:25:22,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:25:22,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:25:22,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845317933] [2022-01-09 23:25:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:25:22,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:25:22,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:25:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:25:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:25:22,578 INFO L87 Difference]: Start difference. First operand has 33 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:25:22,597 INFO L93 Difference]: Finished difference Result 62 states and 92 transitions. [2022-01-09 23:25:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:25:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-09 23:25:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:25:22,605 INFO L225 Difference]: With dead ends: 62 [2022-01-09 23:25:22,606 INFO L226 Difference]: Without dead ends: 29 [2022-01-09 23:25:22,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:25:22,611 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:25:22,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:25:22,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-09 23:25:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-09 23:25:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-09 23:25:22,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2022-01-09 23:25:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:25:22,654 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-09 23:25:22,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-09 23:25:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:25:22,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:22,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:22,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:25:22,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:22,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1011332042, now seen corresponding path program 1 times [2022-01-09 23:25:22,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:22,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105965347] [2022-01-09 23:25:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:22,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:25:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:25:22,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:25:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105965347] [2022-01-09 23:25:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105965347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:25:22,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:25:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:25:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285701452] [2022-01-09 23:25:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:25:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:25:22,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:25:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:25:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:25:22,777 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:25:22,860 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-01-09 23:25:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:25:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-09 23:25:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:25:22,864 INFO L225 Difference]: With dead ends: 69 [2022-01-09 23:25:22,864 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 23:25:22,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:25:22,870 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:25:22,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:25:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 23:25:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-01-09 23:25:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-09 23:25:22,879 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2022-01-09 23:25:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:25:22,880 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-09 23:25:22,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-09 23:25:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-09 23:25:22,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:22,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:22,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:25:22,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1890076394, now seen corresponding path program 1 times [2022-01-09 23:25:22,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:22,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016449018] [2022-01-09 23:25:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:22,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:22,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:25:22,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490222081] [2022-01-09 23:25:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:22,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:22,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:25:22,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:25:22,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:25:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:25:23,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-09 23:25:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:25:23,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-09 23:25:23,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 23:25:23,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:25:23,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-01-09 23:25:23,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-01-09 23:25:23,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-01-09 23:25:23,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-01-09 23:25:23,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-01-09 23:25:24,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2022-01-09 23:25:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:25:24,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:25:25,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:25:25,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:25:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016449018] [2022-01-09 23:25:25,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:25:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490222081] [2022-01-09 23:25:25,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490222081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:25:25,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:25:25,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2022-01-09 23:25:25,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267840838] [2022-01-09 23:25:25,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:25:25,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 23:25:25,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:25:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 23:25:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:25:25,668 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:25:31,548 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2022-01-09 23:25:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-09 23:25:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-09 23:25:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:25:31,550 INFO L225 Difference]: With dead ends: 94 [2022-01-09 23:25:31,551 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:25:31,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=351, Invalid=1905, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:25:31,552 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:25:31,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 177 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 644 Invalid, 0 Unknown, 87 Unchecked, 2.1s Time] [2022-01-09 23:25:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:25:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2022-01-09 23:25:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-01-09 23:25:31,562 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 32 [2022-01-09 23:25:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:25:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-01-09 23:25:31,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-01-09 23:25:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-09 23:25:31,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:31,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:31,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:25:31,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:31,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1237633832, now seen corresponding path program 2 times [2022-01-09 23:25:31,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:31,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150004885] [2022-01-09 23:25:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:31,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:31,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:25:31,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925824998] [2022-01-09 23:25:31,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:25:31,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:25:31,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:25:31,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:25:31,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:25:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:25:31,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:25:31,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:25:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:25:31,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:25:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:25:32,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:25:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150004885] [2022-01-09 23:25:32,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:25:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925824998] [2022-01-09 23:25:32,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925824998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:25:32,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:25:32,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:25:32,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465474331] [2022-01-09 23:25:32,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:25:32,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:25:32,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:25:32,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:25:32,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:25:32,067 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:25:32,243 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2022-01-09 23:25:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:25:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-09 23:25:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:25:32,245 INFO L225 Difference]: With dead ends: 159 [2022-01-09 23:25:32,245 INFO L226 Difference]: Without dead ends: 90 [2022-01-09 23:25:32,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:25:32,246 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:25:32,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 53 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:25:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-09 23:25:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2022-01-09 23:25:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-01-09 23:25:32,257 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 34 [2022-01-09 23:25:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:25:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-01-09 23:25:32,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-01-09 23:25:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-09 23:25:32,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:32,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:32,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:25:32,467 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,SelfDestructingSolverStorable3 [2022-01-09 23:25:32,468 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:32,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash -373015448, now seen corresponding path program 3 times [2022-01-09 23:25:32,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:32,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136185694] [2022-01-09 23:25:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:32,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:32,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:25:32,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3178930] [2022-01-09 23:25:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:25:32,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:25:32,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:25:32,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:25:32,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:25:32,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:25:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:25:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:25:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:25:32,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:25:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:25:32,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:25:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136185694] [2022-01-09 23:25:32,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:25:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3178930] [2022-01-09 23:25:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3178930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:25:32,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:25:32,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:25:32,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444920256] [2022-01-09 23:25:32,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:25:32,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:25:32,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:25:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:25:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:25:32,771 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:25:32,913 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-01-09 23:25:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:25:32,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-09 23:25:32,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:25:32,914 INFO L225 Difference]: With dead ends: 85 [2022-01-09 23:25:32,914 INFO L226 Difference]: Without dead ends: 64 [2022-01-09 23:25:32,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:25:32,915 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:25:32,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 40 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:25:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-09 23:25:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2022-01-09 23:25:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-01-09 23:25:32,922 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 34 [2022-01-09 23:25:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:25:32,923 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-01-09 23:25:32,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:25:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-01-09 23:25:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:25:32,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:25:32,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:25:32,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 23:25:33,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:33,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:25:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:25:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash 772187038, now seen corresponding path program 4 times [2022-01-09 23:25:33,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:25:33,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091855456] [2022-01-09 23:25:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:25:33,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:25:33,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:25:33,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925632920] [2022-01-09 23:25:33,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:25:33,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:25:33,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:25:33,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:25:33,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:25:33,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:25:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:25:33,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 88 conjunts are in the unsatisfiable core [2022-01-09 23:25:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:25:33,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 23:25:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:25:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-01-09 23:25:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-01-09 23:25:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2022-01-09 23:25:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:33,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-01-09 23:25:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-01-09 23:25:33,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:33,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2022-01-09 23:25:34,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2022-01-09 23:25:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2022-01-09 23:25:34,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 43 [2022-01-09 23:25:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 49 [2022-01-09 23:25:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:25:34,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-09 23:25:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:25:34,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2022-01-09 23:25:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:25:34,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:26:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:26:10,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:26:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091855456] [2022-01-09 23:26:10,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:26:10,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925632920] [2022-01-09 23:26:10,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925632920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:26:10,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:26:10,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2022-01-09 23:26:10,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817567917] [2022-01-09 23:26:10,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:26:10,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-09 23:26:10,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:26:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-09 23:26:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2930, Unknown=2, NotChecked=0, Total=3192 [2022-01-09 23:26:10,542 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 57 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)