/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 20:42:49,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 20:42:49,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 20:42:49,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 20:42:49,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 20:42:49,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 20:42:49,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 20:42:49,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 20:42:49,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 20:42:49,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 20:42:49,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 20:42:49,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 20:42:49,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 20:42:49,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 20:42:49,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 20:42:49,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 20:42:49,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 20:42:49,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 20:42:49,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 20:42:49,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 20:42:49,097 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 20:42:49,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 20:42:49,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 20:42:49,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 20:42:49,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 20:42:49,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 20:42:49,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 20:42:49,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 20:42:49,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 20:42:49,107 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 20:42:49,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 20:42:49,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 20:42:49,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 20:42:49,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 20:42:49,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 20:42:49,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 20:42:49,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 20:42:49,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:42:49,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 20:42:49,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 20:42:49,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 20:42:49,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 20:42:49,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 20:42:49,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 20:42:49,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 20:42:49,126 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 20:42:49,126 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 20:42:49,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 20:42:49,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 20:42:49,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 20:42:49,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 20:42:49,300 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 20:42:49,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-03-17 20:42:49,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a307de68/128f58bac45e4fa99dea0ad7e2b4c936/FLAG0aa051867 [2022-03-17 20:42:49,648 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 20:42:49,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-03-17 20:42:49,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a307de68/128f58bac45e4fa99dea0ad7e2b4c936/FLAG0aa051867 [2022-03-17 20:42:50,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a307de68/128f58bac45e4fa99dea0ad7e2b4c936 [2022-03-17 20:42:50,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 20:42:50,090 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 20:42:50,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 20:42:50,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 20:42:50,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 20:42:50,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1d6689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50, skipping insertion in model container [2022-03-17 20:42:50,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 20:42:50,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 20:42:50,207 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/cohencu-ll_valuebound20.c[588,601] [2022-03-17 20:42:50,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:42:50,244 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 20:42:50,251 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/cohencu-ll_valuebound20.c[588,601] [2022-03-17 20:42:50,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 20:42:50,267 INFO L208 MainTranslator]: Completed translation [2022-03-17 20:42:50,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50 WrapperNode [2022-03-17 20:42:50,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 20:42:50,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 20:42:50,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 20:42:50,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 20:42:50,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 20:42:50,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 20:42:50,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 20:42:50,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 20:42:50,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 20:42:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:50,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 20:42:50,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 20:42:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 20:42:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 20:42:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 20:42:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 20:42:50,390 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 20:42:50,391 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 20:42:50,469 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 20:42:50,473 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 20:42:50,473 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 20:42:50,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:42:50 BoogieIcfgContainer [2022-03-17 20:42:50,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 20:42:50,475 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 20:42:50,475 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 20:42:50,476 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 20:42:50,478 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:42:50" (1/1) ... [2022-03-17 20:42:50,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:42:50 BasicIcfg [2022-03-17 20:42:50,491 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 20:42:50,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 20:42:50,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 20:42:50,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 20:42:50,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 08:42:50" (1/4) ... [2022-03-17 20:42:50,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b9bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:42:50, skipping insertion in model container [2022-03-17 20:42:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 08:42:50" (2/4) ... [2022-03-17 20:42:50,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b9bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 08:42:50, skipping insertion in model container [2022-03-17 20:42:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 08:42:50" (3/4) ... [2022-03-17 20:42:50,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653b9bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:42:50, skipping insertion in model container [2022-03-17 20:42:50,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 08:42:50" (4/4) ... [2022-03-17 20:42:50,496 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.cqvasr [2022-03-17 20:42:50,499 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 20:42:50,499 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 20:42:50,536 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 20:42:50,540 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-17 20:42:50,541 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 20:42:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 20:42:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:42:50,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:50,555 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:50,555 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-03-17 20:42:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:50,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13933959] [2022-03-17 20:42:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:50,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:50,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:42:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:50,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:42:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:42:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:50,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13933959] [2022-03-17 20:42:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13933959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:42:50,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:42:50,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 20:42:50,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767625579] [2022-03-17 20:42:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:42:50,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 20:42:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 20:42:50,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 20:42:50,763 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2022-03-17 20:42:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:50,858 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-17 20:42:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 20:42:50,861 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 [2022-03-17 20:42:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:50,867 INFO L225 Difference]: With dead ends: 63 [2022-03-17 20:42:50,868 INFO L226 Difference]: Without dead ends: 31 [2022-03-17 20:42:50,871 INFO L911 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 [2022-03-17 20:42:50,876 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:50,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:42:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-17 20:42:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-17 20:42:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 20:42:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-17 20:42:50,908 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-17 20:42:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:50,909 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-17 20:42:50,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-17 20:42:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-17 20:42:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 20:42:50,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:50,910 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:50,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 20:42:50,910 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-03-17 20:42:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:50,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179846208] [2022-03-17 20:42:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:51,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 20:42:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:51,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 20:42:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:42:51,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:51,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179846208] [2022-03-17 20:42:51,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179846208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:42:51,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:42:51,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 20:42:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361914665] [2022-03-17 20:42:51,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:42:51,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 20:42:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 20:42:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:42:51,067 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:42:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:51,244 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-17 20:42:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:42:51,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 17 [2022-03-17 20:42:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:51,246 INFO L225 Difference]: With dead ends: 37 [2022-03-17 20:42:51,247 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 20:42:51,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:42:51,254 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:51,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:42:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 20:42:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 20:42:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 20:42:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 20:42:51,264 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-17 20:42:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:51,264 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 20:42:51,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-17 20:42:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 20:42:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 20:42:51,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:51,265 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:51,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 20:42:51,265 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-03-17 20:42:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427955999] [2022-03-17 20:42:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:51,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:51,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813426485] [2022-03-17 20:42:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:51,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:51,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:51,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 20:42:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:42:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 20:42:51,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:42:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:51,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427955999] [2022-03-17 20:42:51,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813426485] [2022-03-17 20:42:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813426485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:42:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:42:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:42:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519749056] [2022-03-17 20:42:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:42:51,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:42:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:42:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:42:51,443 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:42:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:51,506 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-17 20:42:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:42:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 20:42:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:51,507 INFO L225 Difference]: With dead ends: 54 [2022-03-17 20:42:51,507 INFO L226 Difference]: Without dead ends: 52 [2022-03-17 20:42:51,508 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:42:51,508 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:51,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:42:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-17 20:42:51,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-17 20:42:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 20:42:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-17 20:42:51,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-17 20:42:51,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:51,521 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-17 20:42:51,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 20:42:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-17 20:42:51,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 20:42:51,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:51,522 INFO L500 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] [2022-03-17 20:42:51,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:51,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:51,723 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-03-17 20:42:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:51,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185391376] [2022-03-17 20:42:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:51,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:51,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323252072] [2022-03-17 20:42:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:51,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:51,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:51,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 20:42:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 20:42:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 20:42:51,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:42:51,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185391376] [2022-03-17 20:42:51,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323252072] [2022-03-17 20:42:51,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323252072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:42:51,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:42:51,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:42:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341607531] [2022-03-17 20:42:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:42:51,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:42:51,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:51,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:42:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:42:51,858 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:42:51,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:51,898 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-17 20:42:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:42:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-17 20:42:51,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:51,901 INFO L225 Difference]: With dead ends: 58 [2022-03-17 20:42:51,901 INFO L226 Difference]: Without dead ends: 56 [2022-03-17 20:42:51,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:42:51,903 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:51,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:42:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-17 20:42:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-17 20:42:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 20:42:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-17 20:42:51,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-17 20:42:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:51,971 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-17 20:42:51,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 20:42:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-17 20:42:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 20:42:51,973 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:51,973 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:51,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:52,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 20:42:52,188 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-03-17 20:42:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:52,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825452903] [2022-03-17 20:42:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:52,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:52,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048611474] [2022-03-17 20:42:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:52,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:52,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 20:42:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:52,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 20:42:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 20:42:52,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 20:42:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825452903] [2022-03-17 20:42:52,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:52,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048611474] [2022-03-17 20:42:52,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048611474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 20:42:52,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 20:42:52,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 20:42:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791420999] [2022-03-17 20:42:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 20:42:52,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 20:42:52,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:52,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 20:42:52,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 20:42:52,325 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:42:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:52,378 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-17 20:42:52,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 20:42:52,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-17 20:42:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:52,379 INFO L225 Difference]: With dead ends: 66 [2022-03-17 20:42:52,380 INFO L226 Difference]: Without dead ends: 54 [2022-03-17 20:42:52,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 20:42:52,381 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:52,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:42:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-17 20:42:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-17 20:42:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 20:42:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-17 20:42:52,394 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-17 20:42:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:52,394 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-17 20:42:52,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 20:42:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-17 20:42:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 20:42:52,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:52,396 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:52,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:52,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:52,603 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-03-17 20:42:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296234270] [2022-03-17 20:42:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:52,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:52,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169434264] [2022-03-17 20:42:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:52,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:52,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:52,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 20:42:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:42:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:42:52,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:42:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 20:42:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296234270] [2022-03-17 20:42:52,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169434264] [2022-03-17 20:42:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169434264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:42:52,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:42:52,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:42:52,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440558217] [2022-03-17 20:42:52,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:42:52,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:42:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:42:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:42:52,882 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:42:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:53,066 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-03-17 20:42:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:42:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-03-17 20:42:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:53,068 INFO L225 Difference]: With dead ends: 77 [2022-03-17 20:42:53,068 INFO L226 Difference]: Without dead ends: 75 [2022-03-17 20:42:53,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:42:53,068 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:53,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 237 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:42:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-17 20:42:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-03-17 20:42:53,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 20:42:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-17 20:42:53,077 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-03-17 20:42:53,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:53,077 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-17 20:42:53,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:42:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-17 20:42:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 20:42:53,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:53,078 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:53,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:53,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:53,278 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-03-17 20:42:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028621207] [2022-03-17 20:42:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:53,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:53,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389503682] [2022-03-17 20:42:53,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:42:53,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:53,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:53,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 20:42:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:42:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:42:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 20:42:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:42:53,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:42:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 20:42:53,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028621207] [2022-03-17 20:42:53,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389503682] [2022-03-17 20:42:53,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389503682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:42:53,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:42:53,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:42:53,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426913141] [2022-03-17 20:42:53,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:42:53,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:42:53,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:42:53,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:42:53,552 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-17 20:42:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:53,662 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-03-17 20:42:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 20:42:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-03-17 20:42:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:53,663 INFO L225 Difference]: With dead ends: 81 [2022-03-17 20:42:53,663 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 20:42:53,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-17 20:42:53,664 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:53,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:42:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 20:42:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-03-17 20:42:53,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 20:42:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-03-17 20:42:53,672 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-03-17 20:42:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:53,672 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-03-17 20:42:53,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-17 20:42:53,672 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-03-17 20:42:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-17 20:42:53,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:53,673 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:42:53,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:53,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:53,874 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:53,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-03-17 20:42:53,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:53,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030065049] [2022-03-17 20:42:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:53,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:53,883 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:53,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941364744] [2022-03-17 20:42:53,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:42:53,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:53,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:53,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:53,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 20:42:53,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 20:42:53,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:42:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 20:42:53,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 20:42:54,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:42:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 20:42:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030065049] [2022-03-17 20:42:54,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941364744] [2022-03-17 20:42:54,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941364744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:42:54,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:42:54,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-17 20:42:54,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957285657] [2022-03-17 20:42:54,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:42:54,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:42:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:42:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 20:42:54,349 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 20:42:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:54,595 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-03-17 20:42:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:42:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-03-17 20:42:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:54,596 INFO L225 Difference]: With dead ends: 93 [2022-03-17 20:42:54,596 INFO L226 Difference]: Without dead ends: 85 [2022-03-17 20:42:54,596 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:42:54,596 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:54,597 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 183 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:42:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-17 20:42:54,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-03-17 20:42:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 20:42:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-03-17 20:42:54,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-03-17 20:42:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:54,605 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-03-17 20:42:54,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 20:42:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-03-17 20:42:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 20:42:54,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:54,606 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-17 20:42:54,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:54,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:54,823 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-03-17 20:42:54,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:54,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80004137] [2022-03-17 20:42:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:54,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:54,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077097703] [2022-03-17 20:42:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:54,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:54,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:54,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:54,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 20:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 20:42:54,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-17 20:42:55,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:42:55,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:42:55,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80004137] [2022-03-17 20:42:55,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:42:55,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077097703] [2022-03-17 20:42:55,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077097703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:42:55,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:42:55,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-17 20:42:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424860847] [2022-03-17 20:42:55,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:42:55,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 20:42:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:42:55,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 20:42:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:42:55,307 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 20:42:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:42:55,378 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-03-17 20:42:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 20:42:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-03-17 20:42:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:42:55,379 INFO L225 Difference]: With dead ends: 95 [2022-03-17 20:42:55,379 INFO L226 Difference]: Without dead ends: 93 [2022-03-17 20:42:55,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-17 20:42:55,380 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 20:42:55,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 20:42:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-17 20:42:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-17 20:42:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 20:42:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-17 20:42:55,389 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-03-17 20:42:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:42:55,389 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-17 20:42:55,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 20:42:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-17 20:42:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-17 20:42:55,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:42:55,390 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1] [2022-03-17 20:42:55,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 20:42:55,598 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:55,598 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:42:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:42:55,599 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-03-17 20:42:55,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:42:55,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590347670] [2022-03-17 20:42:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:55,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:42:55,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:42:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1235553257] [2022-03-17 20:42:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:42:55,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:42:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:42:55,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:42:55,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 20:42:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 20:42:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-17 20:42:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:42:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 20:42:56,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590347670] [2022-03-17 20:43:05,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235553257] [2022-03-17 20:43:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235553257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:05,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:05,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-17 20:43:05,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324126409] [2022-03-17 20:43:05,564 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:05,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-17 20:43:05,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-17 20:43:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-17 20:43:05,568 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:43:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:06,975 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-03-17 20:43:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 20:43:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-03-17 20:43:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:06,977 INFO L225 Difference]: With dead ends: 103 [2022-03-17 20:43:06,977 INFO L226 Difference]: Without dead ends: 90 [2022-03-17 20:43:06,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-17 20:43:06,977 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:06,978 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 252 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:43:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-17 20:43:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-17 20:43:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 20:43:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-03-17 20:43:06,985 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-03-17 20:43:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:06,985 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-03-17 20:43:06,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 20:43:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-03-17 20:43:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-17 20:43:06,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:06,986 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:07,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:07,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 20:43:07,187 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-03-17 20:43:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:07,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798908929] [2022-03-17 20:43:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:07,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073337755] [2022-03-17 20:43:07,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 20:43:07,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:07,198 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:07,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 20:43:07,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 20:43:07,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:43:07,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 20:43:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 20:43:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-17 20:43:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798908929] [2022-03-17 20:43:07,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073337755] [2022-03-17 20:43:07,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073337755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:43:07,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:43:07,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 20:43:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226042806] [2022-03-17 20:43:07,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:07,636 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 20:43:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 20:43:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-17 20:43:07,636 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-17 20:43:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:07,855 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-03-17 20:43:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-03-17 20:43:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:07,857 INFO L225 Difference]: With dead ends: 106 [2022-03-17 20:43:07,857 INFO L226 Difference]: Without dead ends: 104 [2022-03-17 20:43:07,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:43:07,857 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:07,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 226 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:43:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-17 20:43:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-03-17 20:43:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 20:43:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-17 20:43:07,866 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-03-17 20:43:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:07,866 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-17 20:43:07,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-17 20:43:07,866 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-17 20:43:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 20:43:07,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:07,867 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:07,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:08,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:08,083 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:08,084 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-03-17 20:43:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:08,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222155296] [2022-03-17 20:43:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:08,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330135332] [2022-03-17 20:43:08,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:43:08,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:08,092 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:08,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 20:43:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:43:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:43:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 20:43:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-17 20:43:08,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:08,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222155296] [2022-03-17 20:43:08,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:08,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330135332] [2022-03-17 20:43:08,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330135332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:08,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:08,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 20:43:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406335358] [2022-03-17 20:43:08,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:08,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:43:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:43:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:08,628 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 20:43:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:08,734 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-03-17 20:43:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-03-17 20:43:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:08,736 INFO L225 Difference]: With dead ends: 118 [2022-03-17 20:43:08,736 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 20:43:08,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:43:08,737 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:08,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 290 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 20:43:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-17 20:43:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-17 20:43:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-03-17 20:43:08,748 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-03-17 20:43:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:08,749 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-03-17 20:43:08,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 20:43:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-03-17 20:43:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-17 20:43:08,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:08,750 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:08,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:08,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 20:43:08,959 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:08,959 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-03-17 20:43:08,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:08,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192024778] [2022-03-17 20:43:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:08,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:08,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:08,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503902573] [2022-03-17 20:43:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 20:43:08,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:08,974 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:08,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 20:43:09,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 20:43:09,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:43:09,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 20:43:09,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-17 20:43:09,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192024778] [2022-03-17 20:43:09,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:09,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503902573] [2022-03-17 20:43:09,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503902573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:09,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:09,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-17 20:43:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830170832] [2022-03-17 20:43:09,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:09,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 20:43:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 20:43:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 20:43:09,431 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 20:43:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:09,558 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-17 20:43:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 20:43:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-03-17 20:43:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:09,560 INFO L225 Difference]: With dead ends: 126 [2022-03-17 20:43:09,560 INFO L226 Difference]: Without dead ends: 113 [2022-03-17 20:43:09,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-17 20:43:09,561 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:09,561 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 299 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 20:43:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-17 20:43:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-17 20:43:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 20:43:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-03-17 20:43:09,576 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-03-17 20:43:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:09,577 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-03-17 20:43:09,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 20:43:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-03-17 20:43:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-17 20:43:09,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:09,579 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:09,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 20:43:09,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 20:43:09,784 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-03-17 20:43:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182534000] [2022-03-17 20:43:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:09,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600395298] [2022-03-17 20:43:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:43:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:09,801 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:09,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 20:43:10,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 20:43:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:43:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 20:43:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-17 20:43:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:43:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:43:10,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182534000] [2022-03-17 20:43:10,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:43:10,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600395298] [2022-03-17 20:43:10,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600395298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 20:43:10,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 20:43:10,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-17 20:43:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417201583] [2022-03-17 20:43:10,705 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 20:43:10,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 20:43:10,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:43:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 20:43:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 20:43:10,706 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-17 20:43:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:43:10,933 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-03-17 20:43:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 20:43:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 129 [2022-03-17 20:43:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:43:10,934 INFO L225 Difference]: With dead ends: 119 [2022-03-17 20:43:10,934 INFO L226 Difference]: Without dead ends: 115 [2022-03-17 20:43:10,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-17 20:43:10,935 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 20:43:10,935 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 121 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 20:43:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-17 20:43:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-17 20:43:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 20:43:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-03-17 20:43:10,946 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-03-17 20:43:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:43:10,946 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-03-17 20:43:10,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-17 20:43:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-03-17 20:43:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-17 20:43:10,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 20:43:10,947 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 20:43:10,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-17 20:43:11,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 20:43:11,152 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 20:43:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 20:43:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-03-17 20:43:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 20:43:11,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093807920] [2022-03-17 20:43:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 20:43:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 20:43:11,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 20:43:11,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661912462] [2022-03-17 20:43:11,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 20:43:11,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 20:43:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 20:43:11,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 20:43:11,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 20:43:11,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 20:43:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 20:43:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-17 20:43:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 20:43:40,930 WARN L232 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 45 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 20:44:00,731 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_div_v_main_~z~0_BEFORE_CALL_146_45 Int) (main_~x~0 Int) (v_main_~a~0_BEFORE_CALL_109 Int) (aux_mod_v_main_~z~0_BEFORE_CALL_146_45 Int) (v_main_~y~0_BEFORE_CALL_139 Int)) (and (= (+ (* 36 (* aux_div_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 6) (* (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45) 12) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) 12 (* 36 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* v_main_~y~0_BEFORE_CALL_139 12)) (<= (div (+ (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 (- 12) aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* (- 1) aux_mod_v_main_~z~0_BEFORE_CALL_146_45 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) (* v_main_~y~0_BEFORE_CALL_139 6 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 v_main_~y~0_BEFORE_CALL_139) (* 84 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (* (- 36) aux_div_v_main_~z~0_BEFORE_CALL_146_45 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (- 6) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 14) (* v_main_~y~0_BEFORE_CALL_139 6)) 18) (+ (* 6 aux_div_v_main_~z~0_BEFORE_CALL_146_45) aux_mod_v_main_~z~0_BEFORE_CALL_146_45 main_~x~0)) (<= 0 v_main_~a~0_BEFORE_CALL_109) (<= 0 aux_mod_v_main_~z~0_BEFORE_CALL_146_45) (<= 1 |c___VERIFIER_assert_#in~cond|) (< v_main_~a~0_BEFORE_CALL_109 aux_div_v_main_~z~0_BEFORE_CALL_146_45) (<= v_main_~a~0_BEFORE_CALL_109 20) (= (+ (* 6 (* main_~x~0 aux_div_v_main_~z~0_BEFORE_CALL_146_45)) (* aux_mod_v_main_~z~0_BEFORE_CALL_146_45 main_~x~0)) (+ (* main_~x~0 6) (* (* v_main_~a~0_BEFORE_CALL_109 main_~x~0) 6))))) is different from true [2022-03-17 20:44:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 259 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-03-17 20:44:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 20:44:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 204 proven. 34 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2022-03-17 20:44:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 20:44:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093807920] [2022-03-17 20:44:08,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 20:44:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661912462] [2022-03-17 20:44:08,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661912462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 20:44:08,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 20:44:08,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2022-03-17 20:44:08,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901359465] [2022-03-17 20:44:08,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 20:44:08,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 20:44:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 20:44:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 20:44:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=4, NotChecked=42, Total=552 [2022-03-17 20:44:08,539 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 24 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2022-03-17 20:44:14,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 20:44:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 20:44:27,175 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2022-03-17 20:44:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 20:44:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) Word has length 134 [2022-03-17 20:44:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 20:44:27,176 INFO L225 Difference]: With dead ends: 119 [2022-03-17 20:44:27,176 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 20:44:27,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=183, Invalid=744, Unknown=7, NotChecked=58, Total=992 [2022-03-17 20:44:27,177 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-17 20:44:27,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 259 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 229 Invalid, 1 Unknown, 57 Unchecked, 3.9s Time] [2022-03-17 20:44:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 20:44:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 20:44:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-03-17 20:44:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 20:44:27,178 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-03-17 20:44:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 20:44:27,178 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 20:44:27,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 14 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 12 states have call successors, (34) [2022-03-17 20:44:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 20:44:27,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 20:44:27,180 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 20:44:27,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 20:44:27,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-17 20:44:27,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 20:44:34,336 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 20:44:34,336 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-03-17 20:44:34,336 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* (- 1) main_~a~0))) (or (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ .cse0 32767) 65536))) (and (<= 0 (+ 65536 main_~a~0)) (< (div (+ main_~a~0 32768) (- 65536)) (+ (div (+ (- 1) .cse0) 65536) 1)) (< main_~a~0 0)))) [2022-03-17 20:44:34,336 INFO L882 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-03-17 20:44:34,336 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 20) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 20) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 20) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 12))) (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 20) (= (+ (* main_~z~0 main_~z~0) 12) (+ .cse0 (* main_~z~0 6))) (= (+ (* main_~x~0 18) .cse0 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0))) [2022-03-17 20:44:34,337 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= (+ (* main_~z~0 main_~z~0) 6 (* main_~z~0 main_~y~0)) (+ (* main_~x~0 18) (* main_~z~0 4) (* main_~y~0 24))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2022-03-17 20:44:34,337 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-17 20:44:34,337 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-17 20:44:34,338 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:44:34,338 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-17 20:44:34,338 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-17 20:44:34,340 INFO L718 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-03-17 20:44:34,340 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 20:44:34,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 08:44:34 BasicIcfg [2022-03-17 20:44:34,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 20:44:34,349 INFO L158 Benchmark]: Toolchain (without parser) took 104258.83ms. Allocated memory was 169.9MB in the beginning and 272.6MB in the end (delta: 102.8MB). Free memory was 116.7MB in the beginning and 182.6MB in the end (delta: -65.9MB). Peak memory consumption was 129.6MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,349 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 169.9MB. Free memory was 133.5MB in the beginning and 133.4MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 20:44:34,349 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.49ms. Allocated memory was 169.9MB in the beginning and 226.5MB in the end (delta: 56.6MB). Free memory was 116.5MB in the beginning and 203.1MB in the end (delta: -86.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,349 INFO L158 Benchmark]: Boogie Preprocessor took 17.04ms. Allocated memory is still 226.5MB. Free memory was 203.1MB in the beginning and 202.0MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,349 INFO L158 Benchmark]: RCFGBuilder took 188.85ms. Allocated memory is still 226.5MB. Free memory was 201.5MB in the beginning and 190.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,350 INFO L158 Benchmark]: IcfgTransformer took 15.95ms. Allocated memory is still 226.5MB. Free memory was 190.6MB in the beginning and 188.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,350 INFO L158 Benchmark]: TraceAbstraction took 103856.78ms. Allocated memory was 226.5MB in the beginning and 272.6MB in the end (delta: 46.1MB). Free memory was 188.5MB in the beginning and 182.6MB in the end (delta: 5.9MB). Peak memory consumption was 144.7MB. Max. memory is 8.0GB. [2022-03-17 20:44:34,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 169.9MB. Free memory was 133.5MB in the beginning and 133.4MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.49ms. Allocated memory was 169.9MB in the beginning and 226.5MB in the end (delta: 56.6MB). Free memory was 116.5MB in the beginning and 203.1MB in the end (delta: -86.7MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.04ms. Allocated memory is still 226.5MB. Free memory was 203.1MB in the beginning and 202.0MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 188.85ms. Allocated memory is still 226.5MB. Free memory was 201.5MB in the beginning and 190.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.95ms. Allocated memory is still 226.5MB. Free memory was 190.6MB in the beginning and 188.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 103856.78ms. Allocated memory was 226.5MB in the beginning and 272.6MB in the end (delta: 46.1MB). Free memory was 188.5MB in the beginning and 182.6MB in the end (delta: 5.9MB). Peak memory consumption was 144.7MB. 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 103.8s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 21.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 233 SdHoareTripleChecker+Valid, 5.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 168 mSDsluCounter, 2892 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 57 IncrementalHoareTripleChecker+Unchecked, 2290 mSDsCounter, 347 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1668 IncrementalHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 347 mSolverCounterUnsat, 602 mSDtfsCounter, 1668 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1538 GetRequests, 1369 SyntacticMatches, 11 SemanticMatches, 158 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 44.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 117, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 70 PreInvPairs, 115 NumberOfFragments, 652 HoareAnnotationTreeSize, 70 FomulaSimplifications, 896 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 30515 FormulaSimplificationTreeSizeReductionInter, 6.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 70.6s InterpolantComputationTime, 985 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1342 ConstructedInterpolants, 2 QuantifiedInterpolants, 5960 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1921 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 5633/5874 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && a <= 20) && n * 6 + 6 == z) && 0 <= a) && 3 * (n * n) + n * 3 + 1 == y) && n * n * n == x RESULT: Ultimate proved your program to be correct! [2022-03-17 20:44:34,378 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...