/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:56:13,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:56:13,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:56:13,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 06:56:13,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 06:56:13,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 06:56:13,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 06:56:13,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 06:56:13,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 06:56:13,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 06:56:13,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 06:56:13,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 06:56:13,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:56:13,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:56:13,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:56:13,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:56:13,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:56:13,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:56:13,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:56:13,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:56:13,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:56:13,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:56:13,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:56:13,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:56:13,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:56:13,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:56:13,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:56:13,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:56:13,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:56:13,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:56:13,275 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:56:13,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:56:13,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:56:13,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:56:13,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:56:13,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:56:13,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:56:13,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:56:13,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:56:13,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:56:13,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:56:13,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:56:13,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:56:13,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:56:13,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:56:13,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:56:13,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:56:13,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:56:13,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:56:13,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:56:13,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:56:13,281 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:56:13,281 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:56:13,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:56:13,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:56:13,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:56:13,548 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:56:13,549 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:56:13,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-03-20 06:56:13,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76b0cff/7fce95ddf6c648cdb5ebe45c2b05872d/FLAG055217e76 [2022-03-20 06:56:14,025 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:56:14,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-03-20 06:56:14,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76b0cff/7fce95ddf6c648cdb5ebe45c2b05872d/FLAG055217e76 [2022-03-20 06:56:14,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb76b0cff/7fce95ddf6c648cdb5ebe45c2b05872d [2022-03-20 06:56:14,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:56:14,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:56:14,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:56:14,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:56:14,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:56:14,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1198cb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14, skipping insertion in model container [2022-03-20 06:56:14,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:56:14,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:56:14,214 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/prodbin-ll_unwindbound5.c[537,550] [2022-03-20 06:56:14,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:56:14,231 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:56:14,240 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/prodbin-ll_unwindbound5.c[537,550] [2022-03-20 06:56:14,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:56:14,254 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:56:14,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14 WrapperNode [2022-03-20 06:56:14,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:56:14,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:56:14,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:56:14,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:56:14,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:56:14,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:56:14,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:56:14,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:56:14,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:56:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:14,325 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) [2022-03-20 06:56:14,330 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 [2022-03-20 06:56:14,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:56:14,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:56:14,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:56:14,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:56:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:56:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:56:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:56:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:56:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:56:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:56:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:56:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:56:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:56:14,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:56:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:56:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:56:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:56:14,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:56:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:56:14,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:56:14,419 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:56:14,421 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:56:14,567 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:56:14,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:56:14,573 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 06:56:14,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:56:14 BoogieIcfgContainer [2022-03-20 06:56:14,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:56:14,575 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:56:14,575 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:56:14,576 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:56:14,578 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:56:14" (1/1) ... [2022-03-20 06:56:14,580 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:56:14,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:56:14 BasicIcfg [2022-03-20 06:56:14,593 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:56:14,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:56:14,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:56:14,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:56:14,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:56:14" (1/4) ... [2022-03-20 06:56:14,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb97a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:56:14, skipping insertion in model container [2022-03-20 06:56:14,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:56:14" (2/4) ... [2022-03-20 06:56:14,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb97a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:56:14, skipping insertion in model container [2022-03-20 06:56:14,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:56:14" (3/4) ... [2022-03-20 06:56:14,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb97a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:56:14, skipping insertion in model container [2022-03-20 06:56:14,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:56:14" (4/4) ... [2022-03-20 06:56:14,599 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.cJordan [2022-03-20 06:56:14,617 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:56:14,617 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:56:14,682 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:56:14,688 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 06:56:14,688 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:56:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 06:56:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:56:14,724 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:14,724 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:14,725 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2022-03-20 06:56:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:14,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988487225] [2022-03-20 06:56:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:14,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:56:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:56:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:14,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988487225] [2022-03-20 06:56:14,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988487225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:56:14,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:56:14,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:56:14,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912587036] [2022-03-20 06:56:14,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:56:14,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:56:14,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:56:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:56:14,988 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:56:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:15,039 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-03-20 06:56:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:56:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:56:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:15,054 INFO L225 Difference]: With dead ends: 31 [2022-03-20 06:56:15,054 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 06:56:15,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:56:15,066 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:15,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:56:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 06:56:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 06:56:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 06:56:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 06:56:15,102 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-03-20 06:56:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:15,103 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 06:56:15,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:56:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 06:56:15,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 06:56:15,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:15,104 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:15,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:56:15,104 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2022-03-20 06:56:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:15,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000915556] [2022-03-20 06:56:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:15,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:15,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268610797] [2022-03-20 06:56:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:15,145 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) [2022-03-20 06:56:15,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 06:56:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:15,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 06:56:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:15,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:56:15,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:15,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000915556] [2022-03-20 06:56:15,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268610797] [2022-03-20 06:56:15,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268610797] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:56:15,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:56:15,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 06:56:15,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378142868] [2022-03-20 06:56:15,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:56:15,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 06:56:15,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:15,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 06:56:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 06:56:15,288 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:56:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:15,305 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-03-20 06:56:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 06:56:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 06:56:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:15,307 INFO L225 Difference]: With dead ends: 27 [2022-03-20 06:56:15,307 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 06:56:15,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 06:56:15,309 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:15,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:56:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 06:56:15,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 06:56:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 06:56:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 06:56:15,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-03-20 06:56:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:15,314 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 06:56:15,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:56:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 06:56:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 06:56:15,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:15,316 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:15,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 06:56:15,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:15,528 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2022-03-20 06:56:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282309252] [2022-03-20 06:56:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:15,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:15,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688582436] [2022-03-20 06:56:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:15,571 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) [2022-03-20 06:56:15,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 06:56:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:56:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:15,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:56:15,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282309252] [2022-03-20 06:56:15,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:15,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688582436] [2022-03-20 06:56:15,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688582436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:56:15,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:56:15,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:56:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971655510] [2022-03-20 06:56:15,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:56:15,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:56:15,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:56:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:56:15,714 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:56:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:15,751 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-20 06:56:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:56:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 06:56:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:15,753 INFO L225 Difference]: With dead ends: 36 [2022-03-20 06:56:15,753 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 06:56:15,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:56:15,754 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:15,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:56:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 06:56:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-20 06:56:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 06:56:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 06:56:15,763 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-03-20 06:56:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:15,763 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 06:56:15,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:56:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 06:56:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 06:56:15,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:15,764 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:15,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 06:56:15,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 06:56:15,968 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2022-03-20 06:56:15,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95589202] [2022-03-20 06:56:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:15,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:15,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839836479] [2022-03-20 06:56:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:15,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:15,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:15,983 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) [2022-03-20 06:56:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 06:56:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:56:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:16,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:56:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95589202] [2022-03-20 06:56:16,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839836479] [2022-03-20 06:56:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839836479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:56:16,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:56:16,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:56:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088856833] [2022-03-20 06:56:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:56:16,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:56:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:56:16,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:56:16,143 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:56:16,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:16,179 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-20 06:56:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:56:16,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 06:56:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:16,181 INFO L225 Difference]: With dead ends: 35 [2022-03-20 06:56:16,181 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 06:56:16,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:56:16,182 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:16,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 97 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:56:16,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 06:56:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-20 06:56:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 06:56:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 06:56:16,187 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-03-20 06:56:16,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:16,187 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 06:56:16,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 06:56:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 06:56:16,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 06:56:16,188 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:16,188 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:16,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:56:16,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:16,400 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2022-03-20 06:56:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198278120] [2022-03-20 06:56:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:16,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:16,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447852945] [2022-03-20 06:56:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:16,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:16,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:16,422 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) [2022-03-20 06:56:16,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 06:56:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:56:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:16,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:56:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:16,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:16,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198278120] [2022-03-20 06:56:16,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:16,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447852945] [2022-03-20 06:56:16,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447852945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:56:16,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:56:16,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 06:56:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112441243] [2022-03-20 06:56:16,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:56:16,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 06:56:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 06:56:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:56:16,673 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:56:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:16,742 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-20 06:56:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:56:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-03-20 06:56:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:16,747 INFO L225 Difference]: With dead ends: 63 [2022-03-20 06:56:16,747 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 06:56:16,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:56:16,752 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:16,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 99 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:56:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 06:56:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-03-20 06:56:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 06:56:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-20 06:56:16,767 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 28 [2022-03-20 06:56:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:16,767 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-20 06:56:16,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:56:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-20 06:56:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 06:56:16,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:16,768 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:16,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:56:16,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:16,972 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2022-03-20 06:56:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192313098] [2022-03-20 06:56:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:16,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:16,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303480985] [2022-03-20 06:56:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:16,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:17,003 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) [2022-03-20 06:56:17,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 06:56:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:17,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 06:56:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:17,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:56:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192313098] [2022-03-20 06:56:26,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303480985] [2022-03-20 06:56:26,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303480985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:56:26,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:56:26,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-20 06:56:26,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474251380] [2022-03-20 06:56:26,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:56:26,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 06:56:26,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 06:56:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2022-03-20 06:56:26,066 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:56:28,085 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 [] [2022-03-20 06:56:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:33,053 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-03-20 06:56:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 06:56:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 06:56:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:33,057 INFO L225 Difference]: With dead ends: 92 [2022-03-20 06:56:33,057 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 06:56:33,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2022-03-20 06:56:33,058 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:33,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 136 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 06:56:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 06:56:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-03-20 06:56:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:56:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-03-20 06:56:33,069 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 28 [2022-03-20 06:56:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:33,069 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-03-20 06:56:33,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:56:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-03-20 06:56:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 06:56:33,070 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:33,070 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:33,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 06:56:33,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:33,280 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2022-03-20 06:56:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541062354] [2022-03-20 06:56:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:33,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:33,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116661981] [2022-03-20 06:56:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:33,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:33,292 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) [2022-03-20 06:56:33,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 06:56:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:33,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 06:56:33,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:34,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:56:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:56:35,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541062354] [2022-03-20 06:56:35,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116661981] [2022-03-20 06:56:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116661981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:56:35,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:56:35,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-03-20 06:56:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278085892] [2022-03-20 06:56:35,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:56:35,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 06:56:35,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 06:56:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:56:35,403 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:56:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:36,700 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-03-20 06:56:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 06:56:36,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2022-03-20 06:56:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:36,702 INFO L225 Difference]: With dead ends: 116 [2022-03-20 06:56:36,702 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 06:56:36,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-20 06:56:36,703 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:36,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 205 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 06:56:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 06:56:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-03-20 06:56:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 71 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:56:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-03-20 06:56:36,715 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 28 [2022-03-20 06:56:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:36,716 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-03-20 06:56:36,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:56:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-03-20 06:56:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 06:56:36,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:36,717 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:36,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 06:56:36,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:36,924 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2022-03-20 06:56:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135715363] [2022-03-20 06:56:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:36,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54297025] [2022-03-20 06:56:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:36,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:36,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:36,934 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) [2022-03-20 06:56:36,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 06:56:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:36,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 06:56:36,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:56:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:56:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:56:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:56:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135715363] [2022-03-20 06:56:37,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:56:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54297025] [2022-03-20 06:56:37,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54297025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:56:37,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:56:37,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 06:56:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093913366] [2022-03-20 06:56:37,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:56:37,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 06:56:37,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:56:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 06:56:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 06:56:37,199 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 06:56:39,206 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 [] [2022-03-20 06:56:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:56:39,254 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-03-20 06:56:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 06:56:39,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 06:56:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:56:39,255 INFO L225 Difference]: With dead ends: 98 [2022-03-20 06:56:39,255 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 06:56:39,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:56:39,256 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:56:39,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 113 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 06:56:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 06:56:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-20 06:56:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:56:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-03-20 06:56:39,262 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 34 [2022-03-20 06:56:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:56:39,262 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-03-20 06:56:39,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 06:56:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-03-20 06:56:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 06:56:39,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:56:39,264 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:56:39,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 06:56:39,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:39,468 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:56:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:56:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash 199111383, now seen corresponding path program 1 times [2022-03-20 06:56:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:56:39,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145355317] [2022-03-20 06:56:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:39,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:56:39,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:56:39,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636815948] [2022-03-20 06:56:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:56:39,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:56:39,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:56:39,495 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) [2022-03-20 06:56:39,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 06:56:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:56:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 06:56:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:56:45,817 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:57:05,162 WARN L232 SmtUtils]: Spent 10.49s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:57:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 06:57:15,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:57:19,555 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:57:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 06:57:24,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:57:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145355317] [2022-03-20 06:57:24,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:57:24,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636815948] [2022-03-20 06:57:24,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636815948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:57:24,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:57:24,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-20 06:57:24,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922697727] [2022-03-20 06:57:24,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:57:24,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 06:57:24,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:57:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 06:57:24,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=455, Unknown=3, NotChecked=0, Total=552 [2022-03-20 06:57:24,190 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 06:58:10,783 WARN L232 SmtUtils]: Spent 41.74s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 06:58:13,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 06:58:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:58:17,767 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-03-20 06:58:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 06:58:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-03-20 06:58:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:58:17,769 INFO L225 Difference]: With dead ends: 119 [2022-03-20 06:58:17,769 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 06:58:17,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=181, Invalid=938, Unknown=3, NotChecked=0, Total=1122 [2022-03-20 06:58:17,770 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 06:58:17,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 278 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 245 Invalid, 0 Unknown, 31 Unchecked, 4.8s Time] [2022-03-20 06:58:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 06:58:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-20 06:58:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 93 states have internal predecessors, (101), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:58:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2022-03-20 06:58:17,780 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 48 [2022-03-20 06:58:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:58:17,780 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2022-03-20 06:58:17,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 22 states have internal predecessors, (50), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 06:58:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2022-03-20 06:58:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 06:58:17,782 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:58:17,782 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:58:17,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 06:58:17,995 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,SelfDestructingSolverStorable8 [2022-03-20 06:58:17,996 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:58:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:58:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -831185954, now seen corresponding path program 2 times [2022-03-20 06:58:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:58:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608906391] [2022-03-20 06:58:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:58:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:58:18,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:58:18,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136799754] [2022-03-20 06:58:18,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:58:18,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:58:18,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:58:18,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:58:18,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 06:58:18,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:58:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:58:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:58:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:58:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:58:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:58:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:58:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:58:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608906391] [2022-03-20 06:58:18,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:58:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136799754] [2022-03-20 06:58:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136799754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:58:18,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:58:18,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 06:58:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396205344] [2022-03-20 06:58:18,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:58:18,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 06:58:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:58:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 06:58:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:58:18,669 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 06:58:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:58:18,805 INFO L93 Difference]: Finished difference Result 139 states and 154 transitions. [2022-03-20 06:58:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 06:58:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-20 06:58:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:58:18,807 INFO L225 Difference]: With dead ends: 139 [2022-03-20 06:58:18,807 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 06:58:18,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:58:18,808 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:58:18,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:58:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 06:58:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 06:58:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 112 states have internal predecessors, (122), 17 states have call successors, (17), 14 states have call predecessors, (17), 13 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 06:58:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2022-03-20 06:58:18,815 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 58 [2022-03-20 06:58:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:58:18,815 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2022-03-20 06:58:18,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 06:58:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2022-03-20 06:58:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 06:58:18,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:58:18,817 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:58:18,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 06:58:19,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 06:58:19,028 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:58:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:58:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -339082250, now seen corresponding path program 2 times [2022-03-20 06:58:19,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:58:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053237623] [2022-03-20 06:58:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:58:19,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:58:19,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:58:19,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579763070] [2022-03-20 06:58:19,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:58:19,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:58:19,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:58:19,038 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:58:19,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 06:58:19,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:58:19,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:58:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 06:58:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:58:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 06:58:22,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:58:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:58:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053237623] [2022-03-20 06:58:29,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:58:29,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579763070] [2022-03-20 06:58:29,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579763070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 06:58:29,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:58:29,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 06:58:29,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194406703] [2022-03-20 06:58:29,241 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 06:58:29,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 06:58:29,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:58:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 06:58:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-20 06:58:29,243 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:58:30,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:58:30,445 INFO L93 Difference]: Finished difference Result 176 states and 203 transitions. [2022-03-20 06:58:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 06:58:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-03-20 06:58:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:58:30,447 INFO L225 Difference]: With dead ends: 176 [2022-03-20 06:58:30,447 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 06:58:30,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 06:58:30,448 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 35 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 06:58:30,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 367 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 367 Invalid, 0 Unknown, 84 Unchecked, 0.9s Time] [2022-03-20 06:58:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 06:58:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2022-03-20 06:58:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 06:58:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2022-03-20 06:58:30,455 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 58 [2022-03-20 06:58:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:58:30,456 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2022-03-20 06:58:30,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 21 states have internal predecessors, (38), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:58:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2022-03-20 06:58:30,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 06:58:30,457 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:58:30,457 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:58:30,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 06:58:30,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 06:58:30,671 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:58:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:58:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1548458294, now seen corresponding path program 3 times [2022-03-20 06:58:30,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:58:30,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569458494] [2022-03-20 06:58:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:58:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:58:30,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:58:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678926336] [2022-03-20 06:58:30,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:58:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:58:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:58:30,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:58:30,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 06:58:30,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 06:58:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:58:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 06:58:30,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:58:33,671 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:58:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 06:58:36,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:58:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-20 06:58:40,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:58:40,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569458494] [2022-03-20 06:58:40,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:58:40,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678926336] [2022-03-20 06:58:40,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678926336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:58:40,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:58:40,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-03-20 06:58:40,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841245283] [2022-03-20 06:58:40,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:58:40,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 06:58:40,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:58:40,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 06:58:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2022-03-20 06:58:40,387 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 06:58:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:58:41,368 INFO L93 Difference]: Finished difference Result 167 states and 186 transitions. [2022-03-20 06:58:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 06:58:41,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 58 [2022-03-20 06:58:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:58:41,369 INFO L225 Difference]: With dead ends: 167 [2022-03-20 06:58:41,370 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 06:58:41,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=138, Invalid=509, Unknown=3, NotChecked=0, Total=650 [2022-03-20 06:58:41,370 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 06:58:41,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 233 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 149 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2022-03-20 06:58:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 06:58:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 115. [2022-03-20 06:58:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 90 states have internal predecessors, (100), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:58:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2022-03-20 06:58:41,376 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 58 [2022-03-20 06:58:41,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:58:41,377 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2022-03-20 06:58:41,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-20 06:58:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2022-03-20 06:58:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 06:58:41,378 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:58:41,378 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:58:41,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 06:58:41,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 06:58:41,600 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:58:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:58:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1880993343, now seen corresponding path program 3 times [2022-03-20 06:58:41,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:58:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691726618] [2022-03-20 06:58:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:58:41,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:58:41,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:58:41,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850202184] [2022-03-20 06:58:41,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:58:41,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:58:41,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:58:41,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 06:58:41,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 06:58:41,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 06:58:41,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 06:58:41,742 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 06:58:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 06:58:41,830 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 06:58:41,830 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 06:58:41,831 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 06:58:41,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 06:58:42,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 06:58:42,036 INFO L719 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:58:42,039 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 06:58:42,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:58:42 BasicIcfg [2022-03-20 06:58:42,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 06:58:42,071 INFO L158 Benchmark]: Toolchain (without parser) took 148023.89ms. Allocated memory was 195.0MB in the beginning and 256.9MB in the end (delta: 61.9MB). Free memory was 148.4MB in the beginning and 206.4MB in the end (delta: -58.0MB). Peak memory consumption was 3.4MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,071 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory was 164.9MB in the beginning and 164.8MB in the end (delta: 88.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 06:58:42,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.35ms. Allocated memory is still 195.0MB. Free memory was 148.3MB in the beginning and 173.7MB in the end (delta: -25.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,071 INFO L158 Benchmark]: Boogie Preprocessor took 37.29ms. Allocated memory is still 195.0MB. Free memory was 173.4MB in the beginning and 172.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,072 INFO L158 Benchmark]: RCFGBuilder took 280.77ms. Allocated memory is still 195.0MB. Free memory was 172.0MB in the beginning and 161.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,072 INFO L158 Benchmark]: IcfgTransformer took 17.95ms. Allocated memory is still 195.0MB. Free memory was 161.8MB in the beginning and 160.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,072 INFO L158 Benchmark]: TraceAbstraction took 147476.31ms. Allocated memory was 195.0MB in the beginning and 256.9MB in the end (delta: 61.9MB). Free memory was 160.2MB in the beginning and 206.4MB in the end (delta: -46.2MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. [2022-03-20 06:58:42,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory was 164.9MB in the beginning and 164.8MB in the end (delta: 88.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.35ms. Allocated memory is still 195.0MB. Free memory was 148.3MB in the beginning and 173.7MB in the end (delta: -25.4MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.29ms. Allocated memory is still 195.0MB. Free memory was 173.4MB in the beginning and 172.0MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 280.77ms. Allocated memory is still 195.0MB. Free memory was 172.0MB in the beginning and 161.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.95ms. Allocated memory is still 195.0MB. Free memory was 161.8MB in the beginning and 160.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 147476.31ms. Allocated memory was 195.0MB in the beginning and 256.9MB in the end (delta: 61.9MB). Free memory was 160.2MB in the beginning and 206.4MB in the end (delta: -46.2MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=7, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=4, b=1073741823, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=4, b=1073741823, counter=0, x=4, y=1073741823, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=1, counter++=0, x=4, y=1073741823, z=0] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741823, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741823, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=4, y=1073741822, z=4] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=1, x=8, y=536870911, z=4] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=2, counter++=1, x=8, y=536870911, z=4] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870911, z=4] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870911, z=4] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=8, y=536870910, z=12] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=2, x=16, y=268435455, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=3, counter++=2, x=16, y=268435455, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435455, z=12] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435455, z=12] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=16, y=268435454, z=28] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=3, x=32, y=134217727, z=28] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=4, counter++=3, x=32, y=134217727, z=28] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217727, z=28] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217727, z=28] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=32, y=134217726, z=60] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=4, x=64, y=67108863, z=60] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=5, counter++=4, x=64, y=67108863, z=60] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108863, z=60] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108863, z=60] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=64, y=67108862, z=124] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=4, b=1073741823, counter=5, x=128, y=33554431, z=124] [L33] EXPR counter++ VAL [\old(counter)=0, a=4, b=1073741823, counter=6, counter++=5, x=128, y=33554431, z=124] [L33] COND FALSE !(counter++<5) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 147.4s, OverallIterations: 13, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 66.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 349 SdHoareTripleChecker+Valid, 12.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 1823 SdHoareTripleChecker+Invalid, 12.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 119 IncrementalHoareTripleChecker+Unchecked, 1513 mSDsCounter, 160 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1338 IncrementalHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 160 mSolverCounterUnsat, 310 mSDtfsCounter, 1338 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 750 GetRequests, 562 SyntacticMatches, 16 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 99.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=10, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 138 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 76.9s InterpolantComputationTime, 485 NumberOfCodeBlocks, 475 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 680 ConstructedInterpolants, 9 QuantifiedInterpolants, 4995 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1361 ConjunctsInSsa, 214 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 307/536 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 06:58:42,282 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-20 06:58:42,327 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 137 Received shutdown request...