/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:23:23,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:23:23,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:23:23,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 03:23:23,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 03:23:23,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 03:23:23,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 03:23:23,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 03:23:23,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 03:23:23,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 03:23:23,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 03:23:23,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 03:23:23,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 03:23:23,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 03:23:23,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 03:23:23,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 03:23:23,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 03:23:23,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 03:23:23,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 03:23:23,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 03:23:23,254 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 03:23:23,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 03:23:23,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 03:23:23,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 03:23:23,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 03:23:23,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-18 03:23:23,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-18 03:23:23,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-18 03:23:23,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-18 03:23:23,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-18 03:23:23,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-18 03:23:23,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 03:23:23,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 03:23:23,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 03:23:23,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 03:23:23,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 03:23:23,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 03:23:23,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 03:23:23,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 03:23:23,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:23:23,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:23:23,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:23:23,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 03:23:23,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:23:23,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:23:23,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:23:23,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:23:23,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:23:23,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:23:23,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:23:23,290 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:23:23,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:23:23,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:23:23,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:23:23,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:23:23,505 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:23:23,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2022-03-18 03:23:23,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0106a2f34/3d375c17e9374fa085acc1f61c30c663/FLAG718488b98 [2022-03-18 03:23:23,930 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:23:23,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound1.c [2022-03-18 03:23:23,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0106a2f34/3d375c17e9374fa085acc1f61c30c663/FLAG718488b98 [2022-03-18 03:23:23,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0106a2f34/3d375c17e9374fa085acc1f61c30c663 [2022-03-18 03:23:23,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:23:23,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:23:23,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:23:23,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:23:23,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:23:23,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:23:23" (1/1) ... [2022-03-18 03:23:23,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cbaf8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:23, skipping insertion in model container [2022-03-18 03:23:23,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:23:23" (1/1) ... [2022-03-18 03:23:23,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:23:23,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:23:24,143 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/hard-u_unwindbound1.c[537,550] [2022-03-18 03:23:24,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:23:24,170 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:23:24,180 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/hard-u_unwindbound1.c[537,550] [2022-03-18 03:23:24,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:23:24,202 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:23:24,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24 WrapperNode [2022-03-18 03:23:24,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:23:24,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:23:24,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:23:24,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:23:24,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:23:24,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:23:24,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:23:24,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:23:24,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (1/1) ... [2022-03-18 03:23:24,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:23:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:24,275 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) [2022-03-18 03:23:24,301 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 [2022-03-18 03:23:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:23:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:23:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:23:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:23:24,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:23:24,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 03:23:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:23:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:23:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:23:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:23:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:23:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:23:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:23:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:23:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:23:24,363 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:23:24,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:23:24,510 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:23:24,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:23:24,516 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 03:23:24,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:23:24 BoogieIcfgContainer [2022-03-18 03:23:24,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:23:24,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:23:24,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:23:24,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:23:24,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:23:23" (1/3) ... [2022-03-18 03:23:24,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688d5f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:23:24, skipping insertion in model container [2022-03-18 03:23:24,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:23:24" (2/3) ... [2022-03-18 03:23:24,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688d5f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:23:24, skipping insertion in model container [2022-03-18 03:23:24,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:23:24" (3/3) ... [2022-03-18 03:23:24,531 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound1.c [2022-03-18 03:23:24,534 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:23:24,534 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:23:24,559 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:23:24,567 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 03:23:24,567 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:23:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 03:23:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 03:23:24,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:24,584 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:23:24,584 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:24,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2022-03-18 03:23:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:24,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [942289166] [2022-03-18 03:23:24,606 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 2 times [2022-03-18 03:23:24,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320062836] [2022-03-18 03:23:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:24,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:24,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:23:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:23:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:23:24,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320062836] [2022-03-18 03:23:24,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320062836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:24,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:24,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:23:24,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [942289166] [2022-03-18 03:23:24,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [942289166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:24,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:24,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:23:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739545582] [2022-03-18 03:23:24,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:24,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:23:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:24,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:23:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:23:24,800 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-18 03:23:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:24,906 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-18 03:23:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:23:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18 [2022-03-18 03:23:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:24,914 INFO L225 Difference]: With dead ends: 66 [2022-03-18 03:23:24,914 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 03:23:24,917 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 [2022-03-18 03:23:24,920 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:24,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:23:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 03:23:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-18 03:23:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:23:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 03:23:24,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-03-18 03:23:24,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:24,956 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 03:23:24,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-03-18 03:23:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 03:23:24,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 03:23:24,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:24,958 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:23:24,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:23:24,958 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2022-03-18 03:23:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1437905231] [2022-03-18 03:23:24,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 2 times [2022-03-18 03:23:24,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:24,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630117267] [2022-03-18 03:23:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:23:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:23:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:23:25,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:25,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630117267] [2022-03-18 03:23:25,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630117267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:25,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1437905231] [2022-03-18 03:23:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1437905231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:25,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800041756] [2022-03-18 03:23:25,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:25,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:23:25,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:23:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:23:25,063 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 03:23:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:25,254 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-18 03:23:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:23:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 18 [2022-03-18 03:23:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:25,255 INFO L225 Difference]: With dead ends: 47 [2022-03-18 03:23:25,255 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 03:23:25,255 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 [2022-03-18 03:23:25,256 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:25,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:23:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 03:23:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-03-18 03:23:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:23:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 03:23:25,264 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-03-18 03:23:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:25,264 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 03:23:25,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 03:23:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 03:23:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 03:23:25,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:25,265 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:23:25,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 03:23:25,265 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2022-03-18 03:23:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [720190620] [2022-03-18 03:23:25,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 2 times [2022-03-18 03:23:25,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405726673] [2022-03-18 03:23:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:25,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:25,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:25,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045106374] [2022-03-18 03:23:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:23:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:25,301 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) [2022-03-18 03:23:25,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 03:23:25,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 03:23:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 03:23:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:23:25,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:23:25,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405726673] [2022-03-18 03:23:25,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:25,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045106374] [2022-03-18 03:23:25,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045106374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:23:25,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [720190620] [2022-03-18 03:23:25,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [720190620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:23:25,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065533790] [2022-03-18 03:23:25,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:25,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 03:23:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 03:23:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 03:23:25,440 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:23:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:25,470 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-03-18 03:23:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 03:23:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-18 03:23:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:25,473 INFO L225 Difference]: With dead ends: 52 [2022-03-18 03:23:25,473 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 03:23:25,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 03:23:25,474 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:25,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:23:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 03:23:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 03:23:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:23:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-03-18 03:23:25,481 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-03-18 03:23:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:25,481 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-03-18 03:23:25,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:23:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-03-18 03:23:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 03:23:25,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:25,482 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, 1] [2022-03-18 03:23:25,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:25,683 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 [2022-03-18 03:23:25,683 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2022-03-18 03:23:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1128747300] [2022-03-18 03:23:25,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 2 times [2022-03-18 03:23:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:25,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122304442] [2022-03-18 03:23:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:23:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:23:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 03:23:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:23:25,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122304442] [2022-03-18 03:23:25,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122304442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:25,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:25,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1128747300] [2022-03-18 03:23:25,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1128747300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:25,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:25,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534669547] [2022-03-18 03:23:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:25,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:23:25,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:23:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:23:25,791 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:23:25,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:25,938 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-18 03:23:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:23:25,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 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 23 [2022-03-18 03:23:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:25,942 INFO L225 Difference]: With dead ends: 52 [2022-03-18 03:23:25,942 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 03:23:25,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:23:25,951 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:25,954 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:23:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 03:23:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-03-18 03:23:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:23:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-18 03:23:25,967 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-03-18 03:23:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:25,968 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-18 03:23:25,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:23:25,968 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-18 03:23:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 03:23:25,970 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:25,970 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, 1] [2022-03-18 03:23:25,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 03:23:25,971 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2022-03-18 03:23:25,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497377858] [2022-03-18 03:23:25,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 2 times [2022-03-18 03:23:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:25,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447649743] [2022-03-18 03:23:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:25,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:26,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:26,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280872134] [2022-03-18 03:23:26,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:23:26,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:26,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:26,016 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) [2022-03-18 03:23:26,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 03:23:26,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:23:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:23:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:23:26,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:23:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447649743] [2022-03-18 03:23:26,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280872134] [2022-03-18 03:23:26,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280872134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:26,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:26,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:23:26,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:26,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497377858] [2022-03-18 03:23:26,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497377858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:26,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:26,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:23:26,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345779359] [2022-03-18 03:23:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:26,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:23:26,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:23:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:23:26,166 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-18 03:23:28,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 03:23:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:28,389 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-18 03:23:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:23:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 28 [2022-03-18 03:23:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:28,390 INFO L225 Difference]: With dead ends: 59 [2022-03-18 03:23:28,390 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 03:23:28,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:23:28,391 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:28,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 03:23:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 03:23:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 03:23:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:23:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-03-18 03:23:28,402 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-03-18 03:23:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:28,403 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-03-18 03:23:28,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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) [2022-03-18 03:23:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-03-18 03:23:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 03:23:28,404 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:28,404 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, 1, 1, 1, 1] [2022-03-18 03:23:28,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:28,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:28,622 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2022-03-18 03:23:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187130198] [2022-03-18 03:23:28,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 2 times [2022-03-18 03:23:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083073611] [2022-03-18 03:23:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:28,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107194495] [2022-03-18 03:23:28,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:23:28,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:28,651 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) [2022-03-18 03:23:28,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 03:23:28,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:23:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:23:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:23:28,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:23:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:28,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083073611] [2022-03-18 03:23:28,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:28,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107194495] [2022-03-18 03:23:28,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107194495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:28,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:28,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:28,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:28,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187130198] [2022-03-18 03:23:28,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187130198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:28,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:28,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:28,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249830171] [2022-03-18 03:23:28,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:28,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:23:28,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:23:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:23:28,842 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-18 03:23:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:28,948 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2022-03-18 03:23:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 03:23:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 36 [2022-03-18 03:23:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:28,949 INFO L225 Difference]: With dead ends: 77 [2022-03-18 03:23:28,949 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 03:23:28,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 03:23:28,950 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:28,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 166 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:23:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 03:23:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-03-18 03:23:28,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.25) internal successors, (50), 42 states have internal predecessors, (50), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:23:28,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2022-03-18 03:23:28,960 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 36 [2022-03-18 03:23:28,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:28,960 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2022-03-18 03:23:28,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-03-18 03:23:28,960 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2022-03-18 03:23:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 03:23:28,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:28,961 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:23:28,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:29,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:29,162 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash 817878903, now seen corresponding path program 1 times [2022-03-18 03:23:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:29,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1195076884] [2022-03-18 03:23:29,850 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:23:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 119537629, now seen corresponding path program 1 times [2022-03-18 03:23:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:29,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660271379] [2022-03-18 03:23:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:29,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:29,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032535770] [2022-03-18 03:23:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:29,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:29,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:29,872 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) [2022-03-18 03:23:29,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 03:23:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:23:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 03:23:29,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:23:30,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:23:30,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:30,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660271379] [2022-03-18 03:23:30,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032535770] [2022-03-18 03:23:30,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032535770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:23:33,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:33,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1195076884] [2022-03-18 03:23:33,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1195076884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:33,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:33,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:23:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123685963] [2022-03-18 03:23:33,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:33,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:23:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:23:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2022-03-18 03:23:33,187 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 03:23:35,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:23:37,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:23:45,662 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 [] [2022-03-18 03:23:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:45,857 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-03-18 03:23:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 03:23:45,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2022-03-18 03:23:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:45,859 INFO L225 Difference]: With dead ends: 105 [2022-03-18 03:23:45,859 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 03:23:45,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=100, Invalid=499, Unknown=1, NotChecked=0, Total=600 [2022-03-18 03:23:45,860 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:45,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 340 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2022-03-18 03:23:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 03:23:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-18 03:23:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:23:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-03-18 03:23:45,870 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 43 [2022-03-18 03:23:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:45,870 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-03-18 03:23:45,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 03:23:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-03-18 03:23:45,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 03:23:45,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:45,871 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:23:45,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:46,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:46,072 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:46,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2022-03-18 03:23:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:46,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [724738484] [2022-03-18 03:27:39,812 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:27:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash -210838127, now seen corresponding path program 1 times [2022-03-18 03:27:39,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:27:39,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047514131] [2022-03-18 03:27:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:27:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:27:39,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:27:39,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127782498] [2022-03-18 03:27:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:27:39,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:27:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:27:39,833 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) [2022-03-18 03:27:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 03:27:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:27:39,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 03:27:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:27:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:27:40,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:27:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:27:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047514131] [2022-03-18 03:27:40,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:27:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127782498] [2022-03-18 03:27:40,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127782498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:27:40,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:27:40,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 03:27:43,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:27:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [724738484] [2022-03-18 03:27:43,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [724738484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:27:43,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:27:43,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 03:27:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905274864] [2022-03-18 03:27:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:27:43,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 03:27:43,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:27:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 03:27:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2022-03-18 03:27:43,449 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 03:27:55,848 WARN L232 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:27:58,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 03:27:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:27:59,462 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-03-18 03:27:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 03:27:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 46 [2022-03-18 03:27:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:27:59,463 INFO L225 Difference]: With dead ends: 104 [2022-03-18 03:27:59,463 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 03:27:59,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=134, Invalid=735, Unknown=1, NotChecked=0, Total=870 [2022-03-18 03:27:59,465 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 50 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-18 03:27:59,465 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 510 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-03-18 03:27:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 03:27:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-03-18 03:27:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 60 states have internal predecessors, (68), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 03:27:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-03-18 03:27:59,477 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 46 [2022-03-18 03:27:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:27:59,478 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-03-18 03:27:59,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.35) internal successors, (27), 15 states have internal predecessors, (27), 5 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-18 03:27:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-03-18 03:27:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 03:27:59,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:27:59,479 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:27:59,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 03:27:59,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:27:59,688 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:27:59,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:27:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2022-03-18 03:27:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:27:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506148569] [2022-03-18 03:27:59,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:27:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 2 times [2022-03-18 03:27:59,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:27:59,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414036040] [2022-03-18 03:27:59,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:27:59,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:27:59,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:27:59,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779678218] [2022-03-18 03:27:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:27:59,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:27:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:27:59,708 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) [2022-03-18 03:27:59,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 03:27:59,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:27:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:27:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:27:59,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:27:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-18 03:27:59,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:27:59,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:27:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414036040] [2022-03-18 03:27:59,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:27:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779678218] [2022-03-18 03:27:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779678218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:27:59,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:27:59,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:27:59,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:27:59,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506148569] [2022-03-18 03:27:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506148569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:27:59,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:27:59,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:27:59,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964109156] [2022-03-18 03:27:59,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:27:59,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:27:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:27:59,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:27:59,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:27:59,863 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 03:27:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:27:59,902 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2022-03-18 03:27:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:27:59,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2022-03-18 03:27:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:27:59,903 INFO L225 Difference]: With dead ends: 110 [2022-03-18 03:27:59,903 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 03:27:59,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:27:59,904 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:27:59,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 67 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:27:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 03:27:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-18 03:27:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:27:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-03-18 03:27:59,928 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 50 [2022-03-18 03:27:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:27:59,929 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-03-18 03:27:59,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 03:27:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-03-18 03:27:59,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 03:27:59,933 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:27:59,933 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:27:59,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 03:28:00,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:28:00,136 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:28:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:28:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 2 times [2022-03-18 03:28:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:28:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1394723890] [2022-03-18 03:28:02,573 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:28:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1218658397, now seen corresponding path program 1 times [2022-03-18 03:28:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:28:02,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914164818] [2022-03-18 03:28:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:28:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:28:02,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:28:02,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215891610] [2022-03-18 03:28:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:28:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:28:02,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:28:02,580 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) [2022-03-18 03:28:02,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 03:28:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:28:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 03:28:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:28:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:28:02,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:28:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:28:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914164818] [2022-03-18 03:28:02,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:28:02,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215891610] [2022-03-18 03:28:02,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215891610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:28:02,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:28:02,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:28:29,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:28:29,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1394723890] [2022-03-18 03:28:29,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1394723890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:28:29,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:28:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 03:28:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738056164] [2022-03-18 03:28:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:28:29,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 03:28:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:28:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 03:28:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=550, Unknown=11, NotChecked=0, Total=650 [2022-03-18 03:28:29,377 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:28:57,512 WARN L232 SmtUtils]: Spent 26.09s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:28:59,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:01,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:03,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:10,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:12,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:14,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:16,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:18,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:20,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:22,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:24,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:26,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:28,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:37,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:39,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:49,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:51,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:53,671 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:55,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:57,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:29:59,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:01,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:03,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:05,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:07,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:21,927 WARN L232 SmtUtils]: Spent 5.97s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:30:23,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 03:30:49,989 WARN L232 SmtUtils]: Spent 12.95s on a formula simplification. DAG size of input: 39 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:30:52,481 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 [] [2022-03-18 03:30:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:30:53,058 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2022-03-18 03:30:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 03:30:53,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-03-18 03:30:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:30:53,061 INFO L225 Difference]: With dead ends: 88 [2022-03-18 03:30:53,061 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 03:30:53,062 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 110.4s TimeCoverageRelationStatistics Valid=151, Invalid=1009, Unknown=30, NotChecked=0, Total=1190 [2022-03-18 03:30:53,063 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 31 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.8s IncrementalHoareTripleChecker+Time [2022-03-18 03:30:53,063 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 170 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 377 Invalid, 27 Unknown, 0 Unchecked, 59.8s Time] [2022-03-18 03:30:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 03:30:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-03-18 03:30:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 14 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:30:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-18 03:30:53,074 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 61 [2022-03-18 03:30:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:30:53,074 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-18 03:30:53,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 17 states have internal predecessors, (34), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:30:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-18 03:30:53,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 03:30:53,079 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:30:53,079 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:30:53,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 03:30:53,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:30:53,280 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:30:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:30:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2022-03-18 03:30:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:30:53,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37863701] [2022-03-18 03:32:21,709 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:32:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1134703343, now seen corresponding path program 1 times [2022-03-18 03:32:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:32:21,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575423750] [2022-03-18 03:32:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:32:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:32:21,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:32:21,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960387748] [2022-03-18 03:32:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:32:21,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:32:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:32:21,731 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) [2022-03-18 03:32:21,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 03:32:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:32:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 03:32:21,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:32:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:32:21,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:32:21,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:32:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575423750] [2022-03-18 03:32:21,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:32:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960387748] [2022-03-18 03:32:21,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960387748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:32:21,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:32:21,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:32:49,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:32:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37863701] [2022-03-18 03:32:49,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37863701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:32:49,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:32:49,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 03:32:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836533193] [2022-03-18 03:32:49,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:32:49,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 03:32:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:32:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 03:32:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=537, Unknown=11, NotChecked=0, Total=650 [2022-03-18 03:32:49,818 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 25 states, 22 states have (on average 1.5) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 03:33:10,889 WARN L232 SmtUtils]: Spent 20.04s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:33:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:33:11,098 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-03-18 03:33:11,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 03:33:11,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 64 [2022-03-18 03:33:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:33:11,098 INFO L225 Difference]: With dead ends: 70 [2022-03-18 03:33:11,098 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 03:33:11,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=130, Invalid=729, Unknown=11, NotChecked=0, Total=870 [2022-03-18 03:33:11,099 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:33:11,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 190 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 03:33:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 03:33:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 03:33:11,100 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) [2022-03-18 03:33:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 03:33:11,100 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2022-03-18 03:33:11,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:33:11,100 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 03:33:11,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 17 states have internal predecessors, (33), 6 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-03-18 03:33:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 03:33:11,101 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 03:33:11,103 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 03:33:11,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 03:33:11,319 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,SelfDestructingSolverStorable10 [2022-03-18 03:33:11,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 03:33:36,179 WARN L232 SmtUtils]: Spent 24.30s on a formula simplification. DAG size of input: 62 DAG size of output: 54 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 03:33:36,606 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-18 03:33:36,606 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-18 03:33:36,606 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-18 03:33:36,607 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (or (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) (not (<= 0 ~counter~0)) (not (<= ~counter~0 0))) [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (or (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) (not (<= 0 ~counter~0)) (not (<= ~counter~0 0))) [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (or (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) (not (<= 0 ~counter~0)) (not (<= ~counter~0 0))) [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point L35-3(lines 35 43) the Hoare annotation is: (let ((.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= 1 (mod main_~B~0 4294967296))) (.cse3 (= main_~q~0 0))) (or (not (<= |old(~counter~0)| 0)) (let ((.cse0 (mod (div main_~d~0 2) 4294967296))) (and (<= .cse0 (mod main_~r~0 4294967296)) .cse1 (<= ~counter~0 1) (<= 1 ~counter~0) (= (mod (div (- main_~d~0) (- 2)) 4294967296) (mod (* main_~B~0 (div (- main_~p~0) (- 2))) 4294967296)) .cse2 (= (mod main_~d~0 2) 0) .cse3 (= (mod main_~p~0 2) 0) (= .cse0 (mod (* main_~B~0 (div main_~p~0 2)) 4294967296)) (= (mod main_~d~0 4294967296) (mod (* main_~B~0 main_~p~0) 4294967296)))) (not (<= 0 |old(~counter~0)|)) (and .cse1 (<= 0 ~counter~0) (<= ~counter~0 0) .cse2 .cse3 (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-18 03:33:36,607 INFO L885 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: true [2022-03-18 03:33:36,607 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 62) the Hoare annotation is: true [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,607 INFO L878 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 62) the Hoare annotation is: true [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L38(lines 35 43) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 62) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 0 ~counter~0) (<= ~counter~0 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: (or (and (<= 0 ~counter~0) (<= ~counter~0 0) (<= 1 (mod main_~B~0 4294967296))) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L53(lines 53 56) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,608 INFO L878 garLoopResultBuilder]: At program point L53-2(lines 23 62) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L47(lines 45 57) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L45(lines 45 57) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (<= 1 |main_#t~post7|) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L45-2(lines 45 57) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (<= 1 ~counter~0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 35 43) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= 1 ~counter~0) (<= |main_#t~post6| 0) (<= 1 (mod main_~B~0 4294967296)) (= main_~q~0 0) (= main_~B~0 main_~d~0) (= ~counter~0 (+ |main_#t~post6| 1)) (= main_~p~0 1)) (not (<= 0 |old(~counter~0)|))) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-18 03:33:36,609 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 03:33:36,609 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-03-18 03:33:36,609 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 03:33:36,610 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 03:33:36,610 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:33:36,610 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (not (<= 1 ~counter~0))) (.cse2 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse3 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= (mod main_~r~0 4294967296) (mod main_~A~0 4294967296))) .cse0 .cse1 .cse2 .cse3) (or .cse0 .cse1 .cse2 (not (= (mod main_~q~0 4294967296) 0)) .cse3) (or .cse0 .cse1 .cse2 (not (= main_~B~0 main_~d~0)) .cse3 (not (= main_~p~0 1)) (not (<= 1 (mod main_~B~0 4294967296)))))) [2022-03-18 03:33:36,610 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 03:33:36,610 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (not (<= 1 ~counter~0))) (.cse2 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse3 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= (mod main_~r~0 4294967296) (mod main_~A~0 4294967296))) .cse0 .cse1 .cse2 .cse3) (or .cse0 .cse1 .cse2 (not (= (mod main_~q~0 4294967296) 0)) .cse3) (or .cse0 .cse1 .cse2 (not (= main_~B~0 main_~d~0)) .cse3 (not (= main_~p~0 1)) (not (<= 1 (mod main_~B~0 4294967296)))))) [2022-03-18 03:33:36,610 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (not (<= 1 ~counter~0))) (.cse2 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse3 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= (mod main_~r~0 4294967296) (mod main_~A~0 4294967296))) .cse0 .cse1 .cse2 .cse3) (or .cse0 .cse1 .cse2 (not (= (mod main_~q~0 4294967296) 0)) .cse3) (or .cse0 .cse1 .cse2 (not (= main_~B~0 main_~d~0)) .cse3 (not (= main_~p~0 1)) (not (<= 1 (mod main_~B~0 4294967296)))))) [2022-03-18 03:33:36,610 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:33:36,616 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 03:33:36,617 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 03:33:36,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 03:33:36 BoogieIcfgContainer [2022-03-18 03:33:36,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 03:33:36,644 INFO L158 Benchmark]: Toolchain (without parser) took 612679.05ms. Allocated memory was 181.4MB in the beginning and 231.7MB in the end (delta: 50.3MB). Free memory was 131.6MB in the beginning and 106.7MB in the end (delta: 24.9MB). Peak memory consumption was 75.5MB. Max. memory is 8.0GB. [2022-03-18 03:33:36,644 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 181.4MB. Free memory was 148.7MB in the beginning and 148.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 03:33:36,644 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 181.4MB. Free memory was 131.4MB in the beginning and 158.2MB in the end (delta: -26.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 03:33:36,645 INFO L158 Benchmark]: Boogie Preprocessor took 35.84ms. Allocated memory is still 181.4MB. Free memory was 158.2MB in the beginning and 156.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 03:33:36,645 INFO L158 Benchmark]: RCFGBuilder took 277.46ms. Allocated memory is still 181.4MB. Free memory was 156.7MB in the beginning and 145.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 03:33:36,645 INFO L158 Benchmark]: TraceAbstraction took 612125.41ms. Allocated memory was 181.4MB in the beginning and 231.7MB in the end (delta: 50.3MB). Free memory was 145.2MB in the beginning and 106.7MB in the end (delta: 38.5MB). Peak memory consumption was 89.2MB. Max. memory is 8.0GB. [2022-03-18 03:33:36,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 181.4MB. Free memory was 148.7MB in the beginning and 148.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 235.88ms. Allocated memory is still 181.4MB. Free memory was 131.4MB in the beginning and 158.2MB in the end (delta: -26.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.84ms. Allocated memory is still 181.4MB. Free memory was 158.2MB in the beginning and 156.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 277.46ms. Allocated memory is still 181.4MB. Free memory was 156.7MB in the beginning and 145.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 612125.41ms. Allocated memory was 181.4MB in the beginning and 231.7MB in the end (delta: 50.3MB). Free memory was 145.2MB in the beginning and 106.7MB in the end (delta: 38.5MB). Peak memory consumption was 89.2MB. 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 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 612.1s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 196.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 32 mSolverCounterUnknown, 269 SdHoareTripleChecker+Valid, 76.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 232 mSDsluCounter, 1935 SdHoareTripleChecker+Invalid, 75.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1534 mSDsCounter, 154 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1723 IncrementalHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 154 mSolverCounterUnsat, 401 mSDtfsCounter, 1723 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 452 GetRequests, 286 SyntacticMatches, 22 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 180.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, InterpolantAutomatonStates: 118, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 307 PreInvPairs, 378 NumberOfFragments, 820 HoareAnnotationTreeSize, 307 FomulaSimplifications, 300 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 37 FomulaSimplificationsInter, 1170 FormulaSimplificationTreeSizeReductionInter, 25.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: 35]: Loop Invariant Derived loop invariant: ((!(\old(counter) <= 0) || ((((((((((d / 2 % 4294967296 <= r % 4294967296 && A == r) && counter <= 1) && 1 <= counter) && -d / -2 % 4294967296 == B * (-p / -2) % 4294967296) && 1 <= B % 4294967296) && d % 2 == 0) && q == 0) && p % 2 == 0) && d / 2 % 4294967296 == B * (p / 2) % 4294967296) && d % 4294967296 == B * p % 4294967296)) || !(0 <= \old(counter))) || ((((((A == r && 0 <= counter) && counter <= 0) && 1 <= B % 4294967296) && q == 0) && B == d) && p == 1) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: ((!(\old(cond) == 0) && cond == \old(cond)) || !(0 <= counter)) || !(counter <= 0) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (((!(1 <= \old(cond)) || 1 <= cond) && ((((!(r % 4294967296 == A % 4294967296) || !(\old(cond) == 1)) || !(1 <= counter)) || \old(cond) == cond) || !(counter <= 1))) && ((((!(\old(cond) == 1) || !(1 <= counter)) || \old(cond) == cond) || !(q % 4294967296 == 0)) || !(counter <= 1))) && ((((((!(\old(cond) == 1) || !(1 <= counter)) || \old(cond) == cond) || !(B == d)) || !(counter <= 1)) || !(p == 1)) || !(1 <= B % 4294967296)) RESULT: Ultimate proved your program to be correct! [2022-03-18 03:33:36,773 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...