/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 11:44:12,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 11:44:12,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 11:44:12,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 11:44:12,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 11:44:12,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 11:44:12,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 11:44:12,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 11:44:12,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 11:44:12,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 11:44:12,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 11:44:12,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 11:44:12,279 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 11:44:12,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 11:44:12,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 11:44:12,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 11:44:12,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 11:44:12,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 11:44:12,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 11:44:12,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 11:44:12,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 11:44:12,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-28 11:44:12,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 11:44:12,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 11:44:12,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 11:44:12,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 11:44:12,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 11:44:12,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 11:44:12,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 11:44:12,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 11:44:12,305 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 11:44:12,306 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 11:44:12,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 11:44:12,306 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-28 11:44:12,306 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 11:44:12,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 11:44:12,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 11:44:12,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 11:44:12,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 11:44:12,552 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 11:44:12,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i [2022-04-28 11:44:12,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178048d4c/4e9e953278524d2b82cc35b9971a2992/FLAGb980c85b4 [2022-04-28 11:44:13,048 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 11:44:13,049 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound50.i [2022-04-28 11:44:13,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178048d4c/4e9e953278524d2b82cc35b9971a2992/FLAGb980c85b4 [2022-04-28 11:44:13,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178048d4c/4e9e953278524d2b82cc35b9971a2992 [2022-04-28 11:44:13,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 11:44:13,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 11:44:13,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 11:44:13,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 11:44:13,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 11:44:13,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@658231e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13, skipping insertion in model container [2022-04-28 11:44:13,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 11:44:13,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 11:44:13,625 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/divbin2_unwindbound50.i[951,964] [2022-04-28 11:44:13,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 11:44:13,647 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 11:44:13,659 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/divbin2_unwindbound50.i[951,964] [2022-04-28 11:44:13,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 11:44:13,679 INFO L208 MainTranslator]: Completed translation [2022-04-28 11:44:13,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13 WrapperNode [2022-04-28 11:44:13,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 11:44:13,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 11:44:13,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 11:44:13,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 11:44:13,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 11:44:13,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 11:44:13,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 11:44:13,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 11:44:13,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (1/1) ... [2022-04-28 11:44:13,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 11:44:13,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:13,765 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) [2022-04-28 11:44:13,791 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 [2022-04-28 11:44:13,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 11:44:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 11:44:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 11:44:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 11:44:13,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 11:44:13,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 11:44:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 11:44:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 11:44:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-28 11:44:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-28 11:44:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 11:44:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 11:44:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-28 11:44:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 11:44:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 11:44:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 11:44:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 11:44:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 11:44:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 11:44:13,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 11:44:13,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 11:44:13,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 11:44:13,900 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 11:44:13,902 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 11:44:14,140 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 11:44:14,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 11:44:14,146 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-28 11:44:14,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 11:44:14 BoogieIcfgContainer [2022-04-28 11:44:14,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 11:44:14,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 11:44:14,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 11:44:14,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 11:44:14,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 11:44:13" (1/3) ... [2022-04-28 11:44:14,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306fdae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 11:44:14, skipping insertion in model container [2022-04-28 11:44:14,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 11:44:13" (2/3) ... [2022-04-28 11:44:14,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306fdae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 11:44:14, skipping insertion in model container [2022-04-28 11:44:14,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 11:44:14" (3/3) ... [2022-04-28 11:44:14,155 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2022-04-28 11:44:14,168 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 11:44:14,168 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 11:44:14,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 11:44:14,239 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3dbcb76c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6aed903d [2022-04-28 11:44:14,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 11:44:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 11:44:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 11:44:14,253 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:14,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:14,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2022-04-28 11:44:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860303816] [2022-04-28 11:44:14,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 11:44:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 2 times [2022-04-28 11:44:14,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:14,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657819662] [2022-04-28 11:44:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:14,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:14,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 11:44:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:14,490 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {29#true} is VALID [2022-04-28 11:44:14,491 INFO L290 TraceCheckUtils]: 1: Hoare triple {29#true} assume true; {29#true} is VALID [2022-04-28 11:44:14,491 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {29#true} {29#true} #82#return; {29#true} is VALID [2022-04-28 11:44:14,494 INFO L272 TraceCheckUtils]: 0: Hoare triple {29#true} call ULTIMATE.init(); {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 11:44:14,494 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {29#true} is VALID [2022-04-28 11:44:14,494 INFO L290 TraceCheckUtils]: 2: Hoare triple {29#true} assume true; {29#true} is VALID [2022-04-28 11:44:14,494 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {29#true} {29#true} #82#return; {29#true} is VALID [2022-04-28 11:44:14,495 INFO L272 TraceCheckUtils]: 4: Hoare triple {29#true} call #t~ret4 := main(); {29#true} is VALID [2022-04-28 11:44:14,495 INFO L290 TraceCheckUtils]: 5: Hoare triple {29#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {29#true} is VALID [2022-04-28 11:44:14,496 INFO L290 TraceCheckUtils]: 6: Hoare triple {29#true} assume !true; {30#false} is VALID [2022-04-28 11:44:14,497 INFO L290 TraceCheckUtils]: 7: Hoare triple {30#false} assume !true; {30#false} is VALID [2022-04-28 11:44:14,497 INFO L272 TraceCheckUtils]: 8: Hoare triple {30#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {30#false} is VALID [2022-04-28 11:44:14,498 INFO L290 TraceCheckUtils]: 9: Hoare triple {30#false} ~cond := #in~cond; {30#false} is VALID [2022-04-28 11:44:14,498 INFO L290 TraceCheckUtils]: 10: Hoare triple {30#false} assume 0 == ~cond; {30#false} is VALID [2022-04-28 11:44:14,498 INFO L290 TraceCheckUtils]: 11: Hoare triple {30#false} assume !false; {30#false} is VALID [2022-04-28 11:44:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:14,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:14,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657819662] [2022-04-28 11:44:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657819662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:14,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:14,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 11:44:14,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:14,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860303816] [2022-04-28 11:44:14,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860303816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:14,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:14,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 11:44:14,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015131435] [2022-04-28 11:44:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 11:44:14,516 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:14,519 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:14,544 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 11:44:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 11:44:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 11:44:14,566 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:14,726 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-04-28 11:44:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 11:44:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 11:44:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2022-04-28 11:44:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2022-04-28 11:44:14,745 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 60 transitions. [2022-04-28 11:44:14,822 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 60 edges. 60 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:14,830 INFO L225 Difference]: With dead ends: 44 [2022-04-28 11:44:14,830 INFO L226 Difference]: Without dead ends: 22 [2022-04-28 11:44:14,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 11:44:14,836 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:14,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-28 11:44:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-28 11:44:14,862 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:14,863 INFO L82 GeneralOperation]: Start isEquivalent. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:14,864 INFO L74 IsIncluded]: Start isIncluded. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:14,864 INFO L87 Difference]: Start difference. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:14,868 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-04-28 11:44:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-28 11:44:14,868 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:14,868 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:14,869 INFO L74 IsIncluded]: Start isIncluded. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 22 states. [2022-04-28 11:44:14,869 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 22 states. [2022-04-28 11:44:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:14,872 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-04-28 11:44:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-28 11:44:14,872 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:14,873 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:14,873 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:14,873 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-04-28 11:44:14,877 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-04-28 11:44:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-04-28 11:44:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:14,878 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 21 states and 26 transitions. [2022-04-28 11:44:14,906 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-04-28 11:44:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-28 11:44:14,907 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:14,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 11:44:14,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2022-04-28 11:44:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:14,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700277450] [2022-04-28 11:44:14,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 11:44:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 2 times [2022-04-28 11:44:14,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112101237] [2022-04-28 11:44:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:14,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 11:44:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:14,990 INFO L290 TraceCheckUtils]: 0: Hoare triple {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,991 INFO L290 TraceCheckUtils]: 1: Hoare triple {216#(<= ~counter~0 0)} assume true; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,992 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {216#(<= ~counter~0 0)} {211#true} #82#return; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,992 INFO L272 TraceCheckUtils]: 0: Hoare triple {211#true} call ULTIMATE.init(); {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 11:44:14,993 INFO L290 TraceCheckUtils]: 1: Hoare triple {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,994 INFO L290 TraceCheckUtils]: 2: Hoare triple {216#(<= ~counter~0 0)} assume true; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,994 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {216#(<= ~counter~0 0)} {211#true} #82#return; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,995 INFO L272 TraceCheckUtils]: 4: Hoare triple {216#(<= ~counter~0 0)} call #t~ret4 := main(); {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,995 INFO L290 TraceCheckUtils]: 5: Hoare triple {216#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {216#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:14,996 INFO L290 TraceCheckUtils]: 6: Hoare triple {216#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {217#(<= |main_#t~post2| 0)} is VALID [2022-04-28 11:44:14,996 INFO L290 TraceCheckUtils]: 7: Hoare triple {217#(<= |main_#t~post2| 0)} assume !(#t~post2 < 50);havoc #t~post2; {212#false} is VALID [2022-04-28 11:44:14,997 INFO L290 TraceCheckUtils]: 8: Hoare triple {212#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {212#false} is VALID [2022-04-28 11:44:14,997 INFO L290 TraceCheckUtils]: 9: Hoare triple {212#false} assume !(#t~post3 < 50);havoc #t~post3; {212#false} is VALID [2022-04-28 11:44:14,997 INFO L272 TraceCheckUtils]: 10: Hoare triple {212#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {212#false} is VALID [2022-04-28 11:44:14,997 INFO L290 TraceCheckUtils]: 11: Hoare triple {212#false} ~cond := #in~cond; {212#false} is VALID [2022-04-28 11:44:14,997 INFO L290 TraceCheckUtils]: 12: Hoare triple {212#false} assume 0 == ~cond; {212#false} is VALID [2022-04-28 11:44:14,997 INFO L290 TraceCheckUtils]: 13: Hoare triple {212#false} assume !false; {212#false} is VALID [2022-04-28 11:44:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:14,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112101237] [2022-04-28 11:44:14,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112101237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:14,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:14,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 11:44:14,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:14,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700277450] [2022-04-28 11:44:14,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700277450] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:14,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:14,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 11:44:14,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930805698] [2022-04-28 11:44:15,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-28 11:44:15,001 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:15,001 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,013 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 11:44:15,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 11:44:15,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 11:44:15,015 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,167 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-28 11:44:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 11:44:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-28 11:44:15,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-04-28 11:44:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-04-28 11:44:15,172 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 44 transitions. [2022-04-28 11:44:15,216 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,218 INFO L225 Difference]: With dead ends: 35 [2022-04-28 11:44:15,218 INFO L226 Difference]: Without dead ends: 23 [2022-04-28 11:44:15,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-28 11:44:15,220 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:15,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-28 11:44:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-28 11:44:15,231 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:15,231 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,232 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,232 INFO L87 Difference]: Start difference. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,234 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-04-28 11:44:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-28 11:44:15,234 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:15,234 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:15,235 INFO L74 IsIncluded]: Start isIncluded. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 23 states. [2022-04-28 11:44:15,235 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 23 states. [2022-04-28 11:44:15,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,237 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-04-28 11:44:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-28 11:44:15,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:15,237 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:15,237 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:15,238 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:15,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-28 11:44:15,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-04-28 11:44:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:15,253 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-28 11:44:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,254 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 23 states and 28 transitions. [2022-04-28 11:44:15,285 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-28 11:44:15,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-28 11:44:15,286 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:15,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:15,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-28 11:44:15,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2022-04-28 11:44:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:15,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857991356] [2022-04-28 11:44:15,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 11:44:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 2 times [2022-04-28 11:44:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177358127] [2022-04-28 11:44:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:15,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:15,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479914496] [2022-04-28 11:44:15,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:15,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:15,332 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) [2022-04-28 11:44:15,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-28 11:44:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 11:44:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:15,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 11:44:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:15,597 INFO L272 TraceCheckUtils]: 0: Hoare triple {385#true} call ULTIMATE.init(); {385#true} is VALID [2022-04-28 11:44:15,598 INFO L290 TraceCheckUtils]: 1: Hoare triple {385#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {393#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:15,598 INFO L290 TraceCheckUtils]: 2: Hoare triple {393#(<= ~counter~0 0)} assume true; {393#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:15,599 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {393#(<= ~counter~0 0)} {385#true} #82#return; {393#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:15,600 INFO L272 TraceCheckUtils]: 4: Hoare triple {393#(<= ~counter~0 0)} call #t~ret4 := main(); {393#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:15,600 INFO L290 TraceCheckUtils]: 5: Hoare triple {393#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {393#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:15,601 INFO L290 TraceCheckUtils]: 6: Hoare triple {393#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {409#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:15,601 INFO L290 TraceCheckUtils]: 7: Hoare triple {409#(<= ~counter~0 1)} assume !!(#t~post2 < 50);havoc #t~post2; {409#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:15,602 INFO L290 TraceCheckUtils]: 8: Hoare triple {409#(<= ~counter~0 1)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {409#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:15,602 INFO L290 TraceCheckUtils]: 9: Hoare triple {409#(<= ~counter~0 1)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {419#(<= |main_#t~post3| 1)} is VALID [2022-04-28 11:44:15,603 INFO L290 TraceCheckUtils]: 10: Hoare triple {419#(<= |main_#t~post3| 1)} assume !(#t~post3 < 50);havoc #t~post3; {386#false} is VALID [2022-04-28 11:44:15,603 INFO L272 TraceCheckUtils]: 11: Hoare triple {386#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {386#false} is VALID [2022-04-28 11:44:15,603 INFO L290 TraceCheckUtils]: 12: Hoare triple {386#false} ~cond := #in~cond; {386#false} is VALID [2022-04-28 11:44:15,604 INFO L290 TraceCheckUtils]: 13: Hoare triple {386#false} assume 0 == ~cond; {386#false} is VALID [2022-04-28 11:44:15,604 INFO L290 TraceCheckUtils]: 14: Hoare triple {386#false} assume !false; {386#false} is VALID [2022-04-28 11:44:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:15,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 11:44:15,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177358127] [2022-04-28 11:44:15,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479914496] [2022-04-28 11:44:15,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479914496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:15,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:15,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 11:44:15,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:15,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857991356] [2022-04-28 11:44:15,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857991356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:15,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:15,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 11:44:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287338992] [2022-04-28 11:44:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-28 11:44:15,607 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:15,607 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,629 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 11:44:15,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:15,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 11:44:15,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-28 11:44:15,630 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,727 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-28 11:44:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 11:44:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-28 11:44:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-04-28 11:44:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-04-28 11:44:15,731 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 40 transitions. [2022-04-28 11:44:15,766 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,767 INFO L225 Difference]: With dead ends: 34 [2022-04-28 11:44:15,767 INFO L226 Difference]: Without dead ends: 27 [2022-04-28 11:44:15,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-28 11:44:15,769 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:15,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-28 11:44:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-28 11:44:15,779 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:15,780 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,780 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,780 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,782 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-28 11:44:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-28 11:44:15,783 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:15,783 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:15,783 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 27 states. [2022-04-28 11:44:15,783 INFO L87 Difference]: Start difference. First operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 27 states. [2022-04-28 11:44:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:15,785 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-28 11:44:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-28 11:44:15,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:15,786 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:15,786 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:15,786 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-04-28 11:44:15,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-04-28 11:44:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:15,788 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-04-28 11:44:15,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:15,788 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 32 transitions. [2022-04-28 11:44:15,816 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-04-28 11:44:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-28 11:44:15,817 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:15,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:15,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-28 11:44:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:16,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2022-04-28 11:44:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389559770] [2022-04-28 11:44:16,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 11:44:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 2 times [2022-04-28 11:44:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009298213] [2022-04-28 11:44:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:16,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:16,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405270251] [2022-04-28 11:44:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:16,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:16,047 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) [2022-04-28 11:44:16,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-28 11:44:16,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 11:44:16,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:16,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-28 11:44:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:16,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:16,450 INFO L272 TraceCheckUtils]: 0: Hoare triple {608#true} call ULTIMATE.init(); {608#true} is VALID [2022-04-28 11:44:16,451 INFO L290 TraceCheckUtils]: 1: Hoare triple {608#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {608#true} is VALID [2022-04-28 11:44:16,451 INFO L290 TraceCheckUtils]: 2: Hoare triple {608#true} assume true; {608#true} is VALID [2022-04-28 11:44:16,451 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {608#true} {608#true} #82#return; {608#true} is VALID [2022-04-28 11:44:16,451 INFO L272 TraceCheckUtils]: 4: Hoare triple {608#true} call #t~ret4 := main(); {608#true} is VALID [2022-04-28 11:44:16,452 INFO L290 TraceCheckUtils]: 5: Hoare triple {608#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,453 INFO L290 TraceCheckUtils]: 6: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,453 INFO L290 TraceCheckUtils]: 7: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post2 < 50);havoc #t~post2; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,455 INFO L290 TraceCheckUtils]: 8: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,456 INFO L290 TraceCheckUtils]: 9: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,456 INFO L290 TraceCheckUtils]: 10: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post3 < 50);havoc #t~post3; {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:16,458 INFO L272 TraceCheckUtils]: 11: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {648#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 11:44:16,463 INFO L290 TraceCheckUtils]: 12: Hoare triple {648#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {652#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 11:44:16,464 INFO L290 TraceCheckUtils]: 13: Hoare triple {652#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {609#false} is VALID [2022-04-28 11:44:16,464 INFO L290 TraceCheckUtils]: 14: Hoare triple {609#false} assume !false; {609#false} is VALID [2022-04-28 11:44:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:16,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 11:44:16,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009298213] [2022-04-28 11:44:16,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:16,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405270251] [2022-04-28 11:44:16,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405270251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:16,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:16,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-28 11:44:16,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:16,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389559770] [2022-04-28 11:44:16,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389559770] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:16,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:16,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-28 11:44:16,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360623716] [2022-04-28 11:44:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-28 11:44:16,467 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:16,468 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:16,483 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:16,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-28 11:44:16,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:16,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-28 11:44:16,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-28 11:44:16,484 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:16,676 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-04-28 11:44:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 11:44:16,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-28 11:44:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-28 11:44:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-28 11:44:16,681 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 42 transitions. [2022-04-28 11:44:16,721 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 42 edges. 42 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:16,722 INFO L225 Difference]: With dead ends: 35 [2022-04-28 11:44:16,722 INFO L226 Difference]: Without dead ends: 32 [2022-04-28 11:44:16,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-28 11:44:16,723 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:16,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-28 11:44:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-28 11:44:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-28 11:44:16,747 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:16,747 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:16,747 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:16,747 INFO L87 Difference]: Start difference. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:16,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:16,749 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-28 11:44:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-28 11:44:16,750 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:16,750 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:16,750 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) Second operand 32 states. [2022-04-28 11:44:16,750 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) Second operand 32 states. [2022-04-28 11:44:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:16,752 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-28 11:44:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-28 11:44:16,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:16,753 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:16,753 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:16,753 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-28 11:44:16,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-04-28 11:44:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:16,755 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-28 11:44:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:16,756 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 38 transitions. [2022-04-28 11:44:16,806 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-28 11:44:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-28 11:44:16,807 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:16,807 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:16,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-28 11:44:17,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2022-04-28 11:44:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:17,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193684989] [2022-04-28 11:44:17,051 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 11:44:17,051 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 2 times [2022-04-28 11:44:17,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:17,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312315482] [2022-04-28 11:44:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:17,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457151437] [2022-04-28 11:44:17,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:17,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:17,068 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) [2022-04-28 11:44:17,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-28 11:44:17,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 11:44:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 11:44:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:17,253 INFO L272 TraceCheckUtils]: 0: Hoare triple {858#true} call ULTIMATE.init(); {858#true} is VALID [2022-04-28 11:44:17,253 INFO L290 TraceCheckUtils]: 1: Hoare triple {858#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {858#true} is VALID [2022-04-28 11:44:17,253 INFO L290 TraceCheckUtils]: 2: Hoare triple {858#true} assume true; {858#true} is VALID [2022-04-28 11:44:17,254 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {858#true} {858#true} #82#return; {858#true} is VALID [2022-04-28 11:44:17,254 INFO L272 TraceCheckUtils]: 4: Hoare triple {858#true} call #t~ret4 := main(); {858#true} is VALID [2022-04-28 11:44:17,254 INFO L290 TraceCheckUtils]: 5: Hoare triple {858#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,255 INFO L290 TraceCheckUtils]: 6: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,256 INFO L290 TraceCheckUtils]: 7: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post2 < 50);havoc #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,256 INFO L290 TraceCheckUtils]: 8: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,257 INFO L290 TraceCheckUtils]: 9: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,257 INFO L290 TraceCheckUtils]: 10: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(#t~post2 < 50);havoc #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,258 INFO L290 TraceCheckUtils]: 11: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,258 INFO L290 TraceCheckUtils]: 12: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(#t~post3 < 50);havoc #t~post3; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-28 11:44:17,262 INFO L272 TraceCheckUtils]: 13: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {903#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 11:44:17,262 INFO L290 TraceCheckUtils]: 14: Hoare triple {903#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {907#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 11:44:17,263 INFO L290 TraceCheckUtils]: 15: Hoare triple {907#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {859#false} is VALID [2022-04-28 11:44:17,263 INFO L290 TraceCheckUtils]: 16: Hoare triple {859#false} assume !false; {859#false} is VALID [2022-04-28 11:44:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-28 11:44:17,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 11:44:17,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312315482] [2022-04-28 11:44:17,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457151437] [2022-04-28 11:44:17,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457151437] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:17,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:17,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 11:44:17,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:17,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193684989] [2022-04-28 11:44:17,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193684989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:17,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:17,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 11:44:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448425378] [2022-04-28 11:44:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:17,265 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-28 11:44:17,265 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:17,266 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:17,280 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:17,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 11:44:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 11:44:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 11:44:17,281 INFO L87 Difference]: Start difference. First operand 32 states and 38 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:17,428 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-28 11:44:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 11:44:17,429 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-28 11:44:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-28 11:44:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-28 11:44:17,432 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 41 transitions. [2022-04-28 11:44:17,477 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:17,479 INFO L225 Difference]: With dead ends: 44 [2022-04-28 11:44:17,479 INFO L226 Difference]: Without dead ends: 41 [2022-04-28 11:44:17,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-28 11:44:17,480 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:17,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:17,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-28 11:44:17,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-04-28 11:44:17,501 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:17,502 INFO L82 GeneralOperation]: Start isEquivalent. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:17,502 INFO L74 IsIncluded]: Start isIncluded. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:17,502 INFO L87 Difference]: Start difference. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:17,509 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-04-28 11:44:17,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-04-28 11:44:17,515 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:17,515 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:17,516 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) Second operand 41 states. [2022-04-28 11:44:17,516 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) Second operand 41 states. [2022-04-28 11:44:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:17,520 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-04-28 11:44:17,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-04-28 11:44:17,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:17,522 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:17,522 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:17,522 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-04-28 11:44:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-28 11:44:17,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2022-04-28 11:44:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:17,525 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-28 11:44:17,525 INFO L496 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 11:44:17,525 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 38 transitions. [2022-04-28 11:44:17,569 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-28 11:44:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-28 11:44:17,571 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:17,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:17,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:17,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:17,792 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 1 times [2022-04-28 11:44:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920902406] [2022-04-28 11:44:17,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 2 times [2022-04-28 11:44:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614787942] [2022-04-28 11:44:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:17,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:17,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:17,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930677193] [2022-04-28 11:44:17,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:17,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:17,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:17,832 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) [2022-04-28 11:44:17,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-28 11:44:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 11:44:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-28 11:44:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:18,055 INFO L272 TraceCheckUtils]: 0: Hoare triple {1149#true} call ULTIMATE.init(); {1149#true} is VALID [2022-04-28 11:44:18,056 INFO L290 TraceCheckUtils]: 1: Hoare triple {1149#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1157#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:18,056 INFO L290 TraceCheckUtils]: 2: Hoare triple {1157#(<= ~counter~0 0)} assume true; {1157#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:18,057 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1157#(<= ~counter~0 0)} {1149#true} #82#return; {1157#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:18,057 INFO L272 TraceCheckUtils]: 4: Hoare triple {1157#(<= ~counter~0 0)} call #t~ret4 := main(); {1157#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:18,057 INFO L290 TraceCheckUtils]: 5: Hoare triple {1157#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1157#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:18,058 INFO L290 TraceCheckUtils]: 6: Hoare triple {1157#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1173#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:18,058 INFO L290 TraceCheckUtils]: 7: Hoare triple {1173#(<= ~counter~0 1)} assume !!(#t~post2 < 50);havoc #t~post2; {1173#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:18,059 INFO L290 TraceCheckUtils]: 8: Hoare triple {1173#(<= ~counter~0 1)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1173#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:18,059 INFO L290 TraceCheckUtils]: 9: Hoare triple {1173#(<= ~counter~0 1)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,060 INFO L290 TraceCheckUtils]: 10: Hoare triple {1183#(<= ~counter~0 2)} assume !!(#t~post3 < 50);havoc #t~post3; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,060 INFO L272 TraceCheckUtils]: 11: Hoare triple {1183#(<= ~counter~0 2)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,061 INFO L290 TraceCheckUtils]: 12: Hoare triple {1183#(<= ~counter~0 2)} ~cond := #in~cond; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,061 INFO L290 TraceCheckUtils]: 13: Hoare triple {1183#(<= ~counter~0 2)} assume !(0 == ~cond); {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,062 INFO L290 TraceCheckUtils]: 14: Hoare triple {1183#(<= ~counter~0 2)} assume true; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,062 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1183#(<= ~counter~0 2)} {1183#(<= ~counter~0 2)} #78#return; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,063 INFO L290 TraceCheckUtils]: 16: Hoare triple {1183#(<= ~counter~0 2)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,063 INFO L290 TraceCheckUtils]: 17: Hoare triple {1183#(<= ~counter~0 2)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1183#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:18,064 INFO L290 TraceCheckUtils]: 18: Hoare triple {1183#(<= ~counter~0 2)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1211#(<= |main_#t~post3| 2)} is VALID [2022-04-28 11:44:18,064 INFO L290 TraceCheckUtils]: 19: Hoare triple {1211#(<= |main_#t~post3| 2)} assume !(#t~post3 < 50);havoc #t~post3; {1150#false} is VALID [2022-04-28 11:44:18,064 INFO L272 TraceCheckUtils]: 20: Hoare triple {1150#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1150#false} is VALID [2022-04-28 11:44:18,064 INFO L290 TraceCheckUtils]: 21: Hoare triple {1150#false} ~cond := #in~cond; {1150#false} is VALID [2022-04-28 11:44:18,065 INFO L290 TraceCheckUtils]: 22: Hoare triple {1150#false} assume 0 == ~cond; {1150#false} is VALID [2022-04-28 11:44:18,065 INFO L290 TraceCheckUtils]: 23: Hoare triple {1150#false} assume !false; {1150#false} is VALID [2022-04-28 11:44:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:18,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 11:44:18,237 INFO L290 TraceCheckUtils]: 23: Hoare triple {1150#false} assume !false; {1150#false} is VALID [2022-04-28 11:44:18,237 INFO L290 TraceCheckUtils]: 22: Hoare triple {1150#false} assume 0 == ~cond; {1150#false} is VALID [2022-04-28 11:44:18,238 INFO L290 TraceCheckUtils]: 21: Hoare triple {1150#false} ~cond := #in~cond; {1150#false} is VALID [2022-04-28 11:44:18,238 INFO L272 TraceCheckUtils]: 20: Hoare triple {1150#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1150#false} is VALID [2022-04-28 11:44:18,243 INFO L290 TraceCheckUtils]: 19: Hoare triple {1239#(< |main_#t~post3| 50)} assume !(#t~post3 < 50);havoc #t~post3; {1150#false} is VALID [2022-04-28 11:44:18,244 INFO L290 TraceCheckUtils]: 18: Hoare triple {1243#(< ~counter~0 50)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1239#(< |main_#t~post3| 50)} is VALID [2022-04-28 11:44:18,244 INFO L290 TraceCheckUtils]: 17: Hoare triple {1243#(< ~counter~0 50)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1243#(< ~counter~0 50)} is VALID [2022-04-28 11:44:18,245 INFO L290 TraceCheckUtils]: 16: Hoare triple {1243#(< ~counter~0 50)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1243#(< ~counter~0 50)} is VALID [2022-04-28 11:44:18,245 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1149#true} {1243#(< ~counter~0 50)} #78#return; {1243#(< ~counter~0 50)} is VALID [2022-04-28 11:44:18,246 INFO L290 TraceCheckUtils]: 14: Hoare triple {1149#true} assume true; {1149#true} is VALID [2022-04-28 11:44:18,246 INFO L290 TraceCheckUtils]: 13: Hoare triple {1149#true} assume !(0 == ~cond); {1149#true} is VALID [2022-04-28 11:44:18,246 INFO L290 TraceCheckUtils]: 12: Hoare triple {1149#true} ~cond := #in~cond; {1149#true} is VALID [2022-04-28 11:44:18,246 INFO L272 TraceCheckUtils]: 11: Hoare triple {1243#(< ~counter~0 50)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1149#true} is VALID [2022-04-28 11:44:18,247 INFO L290 TraceCheckUtils]: 10: Hoare triple {1243#(< ~counter~0 50)} assume !!(#t~post3 < 50);havoc #t~post3; {1243#(< ~counter~0 50)} is VALID [2022-04-28 11:44:18,247 INFO L290 TraceCheckUtils]: 9: Hoare triple {1271#(< ~counter~0 49)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1243#(< ~counter~0 50)} is VALID [2022-04-28 11:44:18,248 INFO L290 TraceCheckUtils]: 8: Hoare triple {1271#(< ~counter~0 49)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1271#(< ~counter~0 49)} is VALID [2022-04-28 11:44:18,248 INFO L290 TraceCheckUtils]: 7: Hoare triple {1271#(< ~counter~0 49)} assume !!(#t~post2 < 50);havoc #t~post2; {1271#(< ~counter~0 49)} is VALID [2022-04-28 11:44:18,249 INFO L290 TraceCheckUtils]: 6: Hoare triple {1281#(< ~counter~0 48)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1271#(< ~counter~0 49)} is VALID [2022-04-28 11:44:18,251 INFO L290 TraceCheckUtils]: 5: Hoare triple {1281#(< ~counter~0 48)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1281#(< ~counter~0 48)} is VALID [2022-04-28 11:44:18,252 INFO L272 TraceCheckUtils]: 4: Hoare triple {1281#(< ~counter~0 48)} call #t~ret4 := main(); {1281#(< ~counter~0 48)} is VALID [2022-04-28 11:44:18,260 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1281#(< ~counter~0 48)} {1149#true} #82#return; {1281#(< ~counter~0 48)} is VALID [2022-04-28 11:44:18,260 INFO L290 TraceCheckUtils]: 2: Hoare triple {1281#(< ~counter~0 48)} assume true; {1281#(< ~counter~0 48)} is VALID [2022-04-28 11:44:18,261 INFO L290 TraceCheckUtils]: 1: Hoare triple {1149#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1281#(< ~counter~0 48)} is VALID [2022-04-28 11:44:18,261 INFO L272 TraceCheckUtils]: 0: Hoare triple {1149#true} call ULTIMATE.init(); {1149#true} is VALID [2022-04-28 11:44:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:18,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614787942] [2022-04-28 11:44:18,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930677193] [2022-04-28 11:44:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930677193] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 11:44:18,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 11:44:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-28 11:44:18,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:18,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920902406] [2022-04-28 11:44:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920902406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:18,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-28 11:44:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938869007] [2022-04-28 11:44:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-28 11:44:18,263 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:18,263 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,282 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:18,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-28 11:44:18,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:18,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-28 11:44:18,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-28 11:44:18,283 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:18,431 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-04-28 11:44:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-28 11:44:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-28 11:44:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-04-28 11:44:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-04-28 11:44:18,439 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 55 transitions. [2022-04-28 11:44:18,487 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:18,489 INFO L225 Difference]: With dead ends: 57 [2022-04-28 11:44:18,489 INFO L226 Difference]: Without dead ends: 50 [2022-04-28 11:44:18,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-28 11:44:18,491 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:18,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-28 11:44:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-04-28 11:44:18,533 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:18,534 INFO L82 GeneralOperation]: Start isEquivalent. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) [2022-04-28 11:44:18,534 INFO L74 IsIncluded]: Start isIncluded. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) [2022-04-28 11:44:18,534 INFO L87 Difference]: Start difference. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) [2022-04-28 11:44:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:18,536 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-04-28 11:44:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-04-28 11:44:18,536 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:18,536 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:18,537 INFO L74 IsIncluded]: Start isIncluded. First operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) Second operand 50 states. [2022-04-28 11:44:18,537 INFO L87 Difference]: Start difference. First operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) Second operand 50 states. [2022-04-28 11:44:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:18,539 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-04-28 11:44:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-04-28 11:44:18,539 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:18,539 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:18,539 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:18,539 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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) [2022-04-28 11:44:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-04-28 11:44:18,541 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 24 [2022-04-28 11:44:18,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:18,541 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-04-28 11:44:18,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,542 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 44 states and 52 transitions. [2022-04-28 11:44:18,590 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-04-28 11:44:18,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-28 11:44:18,591 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:18,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:18,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:18,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:18,810 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:18,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:18,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2022-04-28 11:44:18,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:18,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588312981] [2022-04-28 11:44:18,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 2 times [2022-04-28 11:44:18,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:18,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656028355] [2022-04-28 11:44:18,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:18,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:18,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:18,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311386066] [2022-04-28 11:44:18,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:18,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:18,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:18,824 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) [2022-04-28 11:44:18,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-28 11:44:18,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 11:44:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:18,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 11:44:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:18,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:18,956 INFO L272 TraceCheckUtils]: 0: Hoare triple {1606#true} call ULTIMATE.init(); {1606#true} is VALID [2022-04-28 11:44:18,957 INFO L290 TraceCheckUtils]: 1: Hoare triple {1606#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1606#true} is VALID [2022-04-28 11:44:18,957 INFO L290 TraceCheckUtils]: 2: Hoare triple {1606#true} assume true; {1606#true} is VALID [2022-04-28 11:44:18,957 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1606#true} {1606#true} #82#return; {1606#true} is VALID [2022-04-28 11:44:18,957 INFO L272 TraceCheckUtils]: 4: Hoare triple {1606#true} call #t~ret4 := main(); {1606#true} is VALID [2022-04-28 11:44:18,958 INFO L290 TraceCheckUtils]: 5: Hoare triple {1606#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,958 INFO L290 TraceCheckUtils]: 6: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,959 INFO L290 TraceCheckUtils]: 7: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(#t~post2 < 50);havoc #t~post2; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,959 INFO L290 TraceCheckUtils]: 8: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,959 INFO L290 TraceCheckUtils]: 9: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,960 INFO L290 TraceCheckUtils]: 10: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(#t~post3 < 50);havoc #t~post3; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,960 INFO L272 TraceCheckUtils]: 11: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1606#true} is VALID [2022-04-28 11:44:18,960 INFO L290 TraceCheckUtils]: 12: Hoare triple {1606#true} ~cond := #in~cond; {1606#true} is VALID [2022-04-28 11:44:18,960 INFO L290 TraceCheckUtils]: 13: Hoare triple {1606#true} assume !(0 == ~cond); {1606#true} is VALID [2022-04-28 11:44:18,960 INFO L290 TraceCheckUtils]: 14: Hoare triple {1606#true} assume true; {1606#true} is VALID [2022-04-28 11:44:18,961 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1606#true} {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #78#return; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 16: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 17: Hoare triple {1607#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 18: Hoare triple {1607#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 19: Hoare triple {1607#false} assume !!(#t~post3 < 50);havoc #t~post3; {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L272 TraceCheckUtils]: 20: Hoare triple {1607#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 21: Hoare triple {1607#false} ~cond := #in~cond; {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 22: Hoare triple {1607#false} assume 0 == ~cond; {1607#false} is VALID [2022-04-28 11:44:18,962 INFO L290 TraceCheckUtils]: 23: Hoare triple {1607#false} assume !false; {1607#false} is VALID [2022-04-28 11:44:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:18,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 11:44:18,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656028355] [2022-04-28 11:44:18,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:18,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311386066] [2022-04-28 11:44:18,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311386066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:18,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:18,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 11:44:18,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:18,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588312981] [2022-04-28 11:44:18,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588312981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:18,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:18,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 11:44:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376769904] [2022-04-28 11:44:18,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-28 11:44:18,965 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:18,965 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:18,982 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:18,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 11:44:18,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 11:44:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 11:44:18,983 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,054 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-04-28 11:44:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 11:44:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-28 11:44:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 11:44:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 11:44:19,057 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-28 11:44:19,094 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:19,095 INFO L225 Difference]: With dead ends: 65 [2022-04-28 11:44:19,095 INFO L226 Difference]: Without dead ends: 33 [2022-04-28 11:44:19,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 11:44:19,096 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:19,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-28 11:44:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-28 11:44:19,114 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:19,115 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-04-28 11:44:19,115 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-04-28 11:44:19,115 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-04-28 11:44:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,116 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-28 11:44:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-28 11:44:19,117 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:19,117 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:19,117 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) Second operand 33 states. [2022-04-28 11:44:19,117 INFO L87 Difference]: Start difference. First operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) Second operand 33 states. [2022-04-28 11:44:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,118 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-28 11:44:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-28 11:44:19,118 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:19,118 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:19,119 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:19,119 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-04-28 11:44:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-04-28 11:44:19,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2022-04-28 11:44:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:19,120 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-04-28 11:44:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,120 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 39 transitions. [2022-04-28 11:44:19,159 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 39 edges. 39 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-28 11:44:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-28 11:44:19,160 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:19,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:19,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:19,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:19,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash 76649582, now seen corresponding path program 1 times [2022-04-28 11:44:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:19,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043800852] [2022-04-28 11:44:19,383 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 11:44:19,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:19,384 INFO L85 PathProgramCache]: Analyzing trace with hash 76649582, now seen corresponding path program 2 times [2022-04-28 11:44:19,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:19,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063820247] [2022-04-28 11:44:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:19,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:19,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452797066] [2022-04-28 11:44:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:19,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:19,402 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) [2022-04-28 11:44:19,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-28 11:44:19,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 11:44:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 11:44:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:19,581 INFO L272 TraceCheckUtils]: 0: Hoare triple {1942#true} call ULTIMATE.init(); {1942#true} is VALID [2022-04-28 11:44:19,582 INFO L290 TraceCheckUtils]: 1: Hoare triple {1942#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1950#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:19,582 INFO L290 TraceCheckUtils]: 2: Hoare triple {1950#(<= ~counter~0 0)} assume true; {1950#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:19,583 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1950#(<= ~counter~0 0)} {1942#true} #82#return; {1950#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:19,583 INFO L272 TraceCheckUtils]: 4: Hoare triple {1950#(<= ~counter~0 0)} call #t~ret4 := main(); {1950#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:19,583 INFO L290 TraceCheckUtils]: 5: Hoare triple {1950#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1950#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:19,584 INFO L290 TraceCheckUtils]: 6: Hoare triple {1950#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1966#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:19,584 INFO L290 TraceCheckUtils]: 7: Hoare triple {1966#(<= ~counter~0 1)} assume !!(#t~post2 < 50);havoc #t~post2; {1966#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:19,584 INFO L290 TraceCheckUtils]: 8: Hoare triple {1966#(<= ~counter~0 1)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {1966#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:19,585 INFO L290 TraceCheckUtils]: 9: Hoare triple {1966#(<= ~counter~0 1)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1976#(<= |main_#t~post2| 1)} is VALID [2022-04-28 11:44:19,585 INFO L290 TraceCheckUtils]: 10: Hoare triple {1976#(<= |main_#t~post2| 1)} assume !(#t~post2 < 50);havoc #t~post2; {1943#false} is VALID [2022-04-28 11:44:19,585 INFO L290 TraceCheckUtils]: 11: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 12: Hoare triple {1943#false} assume !!(#t~post3 < 50);havoc #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L272 TraceCheckUtils]: 13: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 14: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 15: Hoare triple {1943#false} assume !(0 == ~cond); {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 16: Hoare triple {1943#false} assume true; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {1943#false} {1943#false} #78#return; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 18: Hoare triple {1943#false} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 19: Hoare triple {1943#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1943#false} is VALID [2022-04-28 11:44:19,586 INFO L290 TraceCheckUtils]: 20: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L290 TraceCheckUtils]: 21: Hoare triple {1943#false} assume !(#t~post3 < 50);havoc #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L272 TraceCheckUtils]: 22: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L290 TraceCheckUtils]: 23: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L290 TraceCheckUtils]: 24: Hoare triple {1943#false} assume 0 == ~cond; {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L290 TraceCheckUtils]: 25: Hoare triple {1943#false} assume !false; {1943#false} is VALID [2022-04-28 11:44:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 11:44:19,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 11:44:19,759 INFO L290 TraceCheckUtils]: 25: Hoare triple {1943#false} assume !false; {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L290 TraceCheckUtils]: 24: Hoare triple {1943#false} assume 0 == ~cond; {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L290 TraceCheckUtils]: 23: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L272 TraceCheckUtils]: 22: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L290 TraceCheckUtils]: 21: Hoare triple {1943#false} assume !(#t~post3 < 50);havoc #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L290 TraceCheckUtils]: 20: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,760 INFO L290 TraceCheckUtils]: 19: Hoare triple {1943#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1943#false} is VALID [2022-04-28 11:44:19,761 INFO L290 TraceCheckUtils]: 18: Hoare triple {1943#false} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1943#false} is VALID [2022-04-28 11:44:19,761 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {1942#true} {1943#false} #78#return; {1943#false} is VALID [2022-04-28 11:44:19,761 INFO L290 TraceCheckUtils]: 16: Hoare triple {1942#true} assume true; {1942#true} is VALID [2022-04-28 11:44:19,764 INFO L290 TraceCheckUtils]: 15: Hoare triple {1942#true} assume !(0 == ~cond); {1942#true} is VALID [2022-04-28 11:44:19,765 INFO L290 TraceCheckUtils]: 14: Hoare triple {1942#true} ~cond := #in~cond; {1942#true} is VALID [2022-04-28 11:44:19,765 INFO L272 TraceCheckUtils]: 13: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1942#true} is VALID [2022-04-28 11:44:19,765 INFO L290 TraceCheckUtils]: 12: Hoare triple {1943#false} assume !!(#t~post3 < 50);havoc #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,765 INFO L290 TraceCheckUtils]: 11: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-28 11:44:19,766 INFO L290 TraceCheckUtils]: 10: Hoare triple {2070#(< |main_#t~post2| 50)} assume !(#t~post2 < 50);havoc #t~post2; {1943#false} is VALID [2022-04-28 11:44:19,766 INFO L290 TraceCheckUtils]: 9: Hoare triple {2074#(< ~counter~0 50)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2070#(< |main_#t~post2| 50)} is VALID [2022-04-28 11:44:19,767 INFO L290 TraceCheckUtils]: 8: Hoare triple {2074#(< ~counter~0 50)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2074#(< ~counter~0 50)} is VALID [2022-04-28 11:44:19,767 INFO L290 TraceCheckUtils]: 7: Hoare triple {2074#(< ~counter~0 50)} assume !!(#t~post2 < 50);havoc #t~post2; {2074#(< ~counter~0 50)} is VALID [2022-04-28 11:44:19,768 INFO L290 TraceCheckUtils]: 6: Hoare triple {2084#(< ~counter~0 49)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2074#(< ~counter~0 50)} is VALID [2022-04-28 11:44:19,768 INFO L290 TraceCheckUtils]: 5: Hoare triple {2084#(< ~counter~0 49)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2084#(< ~counter~0 49)} is VALID [2022-04-28 11:44:19,772 INFO L272 TraceCheckUtils]: 4: Hoare triple {2084#(< ~counter~0 49)} call #t~ret4 := main(); {2084#(< ~counter~0 49)} is VALID [2022-04-28 11:44:19,773 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2084#(< ~counter~0 49)} {1942#true} #82#return; {2084#(< ~counter~0 49)} is VALID [2022-04-28 11:44:19,776 INFO L290 TraceCheckUtils]: 2: Hoare triple {2084#(< ~counter~0 49)} assume true; {2084#(< ~counter~0 49)} is VALID [2022-04-28 11:44:19,778 INFO L290 TraceCheckUtils]: 1: Hoare triple {1942#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2084#(< ~counter~0 49)} is VALID [2022-04-28 11:44:19,779 INFO L272 TraceCheckUtils]: 0: Hoare triple {1942#true} call ULTIMATE.init(); {1942#true} is VALID [2022-04-28 11:44:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-28 11:44:19,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:19,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063820247] [2022-04-28 11:44:19,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:19,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452797066] [2022-04-28 11:44:19,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452797066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 11:44:19,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 11:44:19,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-28 11:44:19,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:19,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043800852] [2022-04-28 11:44:19,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043800852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:19,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:19,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 11:44:19,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106075357] [2022-04-28 11:44:19,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-28 11:44:19,794 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:19,794 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,812 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:19,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 11:44:19,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 11:44:19,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-28 11:44:19,814 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,909 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-04-28 11:44:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 11:44:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-28 11:44:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2022-04-28 11:44:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2022-04-28 11:44:19,912 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 47 transitions. [2022-04-28 11:44:19,947 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 47 edges. 47 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:19,948 INFO L225 Difference]: With dead ends: 56 [2022-04-28 11:44:19,948 INFO L226 Difference]: Without dead ends: 35 [2022-04-28 11:44:19,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-28 11:44:19,949 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:19,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-28 11:44:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-28 11:44:19,969 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:19,970 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2022-04-28 11:44:19,970 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2022-04-28 11:44:19,970 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2022-04-28 11:44:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,971 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-28 11:44:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-28 11:44:19,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:19,972 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:19,972 INFO L74 IsIncluded]: Start isIncluded. First operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) Second operand 35 states. [2022-04-28 11:44:19,972 INFO L87 Difference]: Start difference. First operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) Second operand 35 states. [2022-04-28 11:44:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:19,973 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-28 11:44:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-28 11:44:19,973 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:19,973 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:19,973 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:19,974 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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) [2022-04-28 11:44:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-28 11:44:19,975 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-04-28 11:44:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:19,975 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-28 11:44:19,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:19,975 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 35 states and 41 transitions. [2022-04-28 11:44:20,015 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-28 11:44:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-28 11:44:20,016 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:20,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:20,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:20,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:20,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 1 times [2022-04-28 11:44:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:20,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906796270] [2022-04-28 11:44:20,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 11:44:20,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:20,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 2 times [2022-04-28 11:44:20,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:20,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433153232] [2022-04-28 11:44:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:20,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:20,252 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:20,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982618381] [2022-04-28 11:44:20,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:20,254 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) [2022-04-28 11:44:20,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-28 11:44:20,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 11:44:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 11:44:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-28 11:44:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 11:44:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 11:44:20,478 INFO L272 TraceCheckUtils]: 0: Hoare triple {2359#true} call ULTIMATE.init(); {2359#true} is VALID [2022-04-28 11:44:20,479 INFO L290 TraceCheckUtils]: 1: Hoare triple {2359#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2367#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:20,480 INFO L290 TraceCheckUtils]: 2: Hoare triple {2367#(<= ~counter~0 0)} assume true; {2367#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:20,480 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2367#(<= ~counter~0 0)} {2359#true} #82#return; {2367#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:20,480 INFO L272 TraceCheckUtils]: 4: Hoare triple {2367#(<= ~counter~0 0)} call #t~ret4 := main(); {2367#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:20,481 INFO L290 TraceCheckUtils]: 5: Hoare triple {2367#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2367#(<= ~counter~0 0)} is VALID [2022-04-28 11:44:20,481 INFO L290 TraceCheckUtils]: 6: Hoare triple {2367#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2383#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:20,482 INFO L290 TraceCheckUtils]: 7: Hoare triple {2383#(<= ~counter~0 1)} assume !!(#t~post2 < 50);havoc #t~post2; {2383#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:20,482 INFO L290 TraceCheckUtils]: 8: Hoare triple {2383#(<= ~counter~0 1)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2383#(<= ~counter~0 1)} is VALID [2022-04-28 11:44:20,482 INFO L290 TraceCheckUtils]: 9: Hoare triple {2383#(<= ~counter~0 1)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2393#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:20,483 INFO L290 TraceCheckUtils]: 10: Hoare triple {2393#(<= ~counter~0 2)} assume !!(#t~post2 < 50);havoc #t~post2; {2393#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:20,483 INFO L290 TraceCheckUtils]: 11: Hoare triple {2393#(<= ~counter~0 2)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {2393#(<= ~counter~0 2)} is VALID [2022-04-28 11:44:20,483 INFO L290 TraceCheckUtils]: 12: Hoare triple {2393#(<= ~counter~0 2)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,484 INFO L290 TraceCheckUtils]: 13: Hoare triple {2403#(<= ~counter~0 3)} assume !!(#t~post3 < 50);havoc #t~post3; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,485 INFO L272 TraceCheckUtils]: 14: Hoare triple {2403#(<= ~counter~0 3)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,485 INFO L290 TraceCheckUtils]: 15: Hoare triple {2403#(<= ~counter~0 3)} ~cond := #in~cond; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,485 INFO L290 TraceCheckUtils]: 16: Hoare triple {2403#(<= ~counter~0 3)} assume !(0 == ~cond); {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,485 INFO L290 TraceCheckUtils]: 17: Hoare triple {2403#(<= ~counter~0 3)} assume true; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,486 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2403#(<= ~counter~0 3)} {2403#(<= ~counter~0 3)} #78#return; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,486 INFO L290 TraceCheckUtils]: 19: Hoare triple {2403#(<= ~counter~0 3)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,487 INFO L290 TraceCheckUtils]: 20: Hoare triple {2403#(<= ~counter~0 3)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {2403#(<= ~counter~0 3)} is VALID [2022-04-28 11:44:20,487 INFO L290 TraceCheckUtils]: 21: Hoare triple {2403#(<= ~counter~0 3)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2431#(<= |main_#t~post3| 3)} is VALID [2022-04-28 11:44:20,488 INFO L290 TraceCheckUtils]: 22: Hoare triple {2431#(<= |main_#t~post3| 3)} assume !(#t~post3 < 50);havoc #t~post3; {2360#false} is VALID [2022-04-28 11:44:20,488 INFO L272 TraceCheckUtils]: 23: Hoare triple {2360#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2360#false} is VALID [2022-04-28 11:44:20,488 INFO L290 TraceCheckUtils]: 24: Hoare triple {2360#false} ~cond := #in~cond; {2360#false} is VALID [2022-04-28 11:44:20,488 INFO L290 TraceCheckUtils]: 25: Hoare triple {2360#false} assume 0 == ~cond; {2360#false} is VALID [2022-04-28 11:44:20,488 INFO L290 TraceCheckUtils]: 26: Hoare triple {2360#false} assume !false; {2360#false} is VALID [2022-04-28 11:44:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:20,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 11:44:20,704 INFO L290 TraceCheckUtils]: 26: Hoare triple {2360#false} assume !false; {2360#false} is VALID [2022-04-28 11:44:20,705 INFO L290 TraceCheckUtils]: 25: Hoare triple {2360#false} assume 0 == ~cond; {2360#false} is VALID [2022-04-28 11:44:20,705 INFO L290 TraceCheckUtils]: 24: Hoare triple {2360#false} ~cond := #in~cond; {2360#false} is VALID [2022-04-28 11:44:20,705 INFO L272 TraceCheckUtils]: 23: Hoare triple {2360#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2360#false} is VALID [2022-04-28 11:44:20,705 INFO L290 TraceCheckUtils]: 22: Hoare triple {2459#(< |main_#t~post3| 50)} assume !(#t~post3 < 50);havoc #t~post3; {2360#false} is VALID [2022-04-28 11:44:20,706 INFO L290 TraceCheckUtils]: 21: Hoare triple {2463#(< ~counter~0 50)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2459#(< |main_#t~post3| 50)} is VALID [2022-04-28 11:44:20,706 INFO L290 TraceCheckUtils]: 20: Hoare triple {2463#(< ~counter~0 50)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {2463#(< ~counter~0 50)} is VALID [2022-04-28 11:44:20,706 INFO L290 TraceCheckUtils]: 19: Hoare triple {2463#(< ~counter~0 50)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {2463#(< ~counter~0 50)} is VALID [2022-04-28 11:44:20,707 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2359#true} {2463#(< ~counter~0 50)} #78#return; {2463#(< ~counter~0 50)} is VALID [2022-04-28 11:44:20,707 INFO L290 TraceCheckUtils]: 17: Hoare triple {2359#true} assume true; {2359#true} is VALID [2022-04-28 11:44:20,707 INFO L290 TraceCheckUtils]: 16: Hoare triple {2359#true} assume !(0 == ~cond); {2359#true} is VALID [2022-04-28 11:44:20,708 INFO L290 TraceCheckUtils]: 15: Hoare triple {2359#true} ~cond := #in~cond; {2359#true} is VALID [2022-04-28 11:44:20,708 INFO L272 TraceCheckUtils]: 14: Hoare triple {2463#(< ~counter~0 50)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2359#true} is VALID [2022-04-28 11:44:20,708 INFO L290 TraceCheckUtils]: 13: Hoare triple {2463#(< ~counter~0 50)} assume !!(#t~post3 < 50);havoc #t~post3; {2463#(< ~counter~0 50)} is VALID [2022-04-28 11:44:20,709 INFO L290 TraceCheckUtils]: 12: Hoare triple {2491#(< ~counter~0 49)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2463#(< ~counter~0 50)} is VALID [2022-04-28 11:44:20,709 INFO L290 TraceCheckUtils]: 11: Hoare triple {2491#(< ~counter~0 49)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {2491#(< ~counter~0 49)} is VALID [2022-04-28 11:44:20,709 INFO L290 TraceCheckUtils]: 10: Hoare triple {2491#(< ~counter~0 49)} assume !!(#t~post2 < 50);havoc #t~post2; {2491#(< ~counter~0 49)} is VALID [2022-04-28 11:44:20,710 INFO L290 TraceCheckUtils]: 9: Hoare triple {2501#(< ~counter~0 48)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2491#(< ~counter~0 49)} is VALID [2022-04-28 11:44:20,710 INFO L290 TraceCheckUtils]: 8: Hoare triple {2501#(< ~counter~0 48)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2501#(< ~counter~0 48)} is VALID [2022-04-28 11:44:20,719 INFO L290 TraceCheckUtils]: 7: Hoare triple {2501#(< ~counter~0 48)} assume !!(#t~post2 < 50);havoc #t~post2; {2501#(< ~counter~0 48)} is VALID [2022-04-28 11:44:20,721 INFO L290 TraceCheckUtils]: 6: Hoare triple {2511#(< ~counter~0 47)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2501#(< ~counter~0 48)} is VALID [2022-04-28 11:44:20,722 INFO L290 TraceCheckUtils]: 5: Hoare triple {2511#(< ~counter~0 47)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2511#(< ~counter~0 47)} is VALID [2022-04-28 11:44:20,722 INFO L272 TraceCheckUtils]: 4: Hoare triple {2511#(< ~counter~0 47)} call #t~ret4 := main(); {2511#(< ~counter~0 47)} is VALID [2022-04-28 11:44:20,723 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2511#(< ~counter~0 47)} {2359#true} #82#return; {2511#(< ~counter~0 47)} is VALID [2022-04-28 11:44:20,723 INFO L290 TraceCheckUtils]: 2: Hoare triple {2511#(< ~counter~0 47)} assume true; {2511#(< ~counter~0 47)} is VALID [2022-04-28 11:44:20,724 INFO L290 TraceCheckUtils]: 1: Hoare triple {2359#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2511#(< ~counter~0 47)} is VALID [2022-04-28 11:44:20,724 INFO L272 TraceCheckUtils]: 0: Hoare triple {2359#true} call ULTIMATE.init(); {2359#true} is VALID [2022-04-28 11:44:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 11:44:20,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 11:44:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433153232] [2022-04-28 11:44:20,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 11:44:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982618381] [2022-04-28 11:44:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982618381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 11:44:20,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 11:44:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-28 11:44:20,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 11:44:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906796270] [2022-04-28 11:44:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906796270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 11:44:20,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 11:44:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-28 11:44:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684561868] [2022-04-28 11:44:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 11:44:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-04-28 11:44:20,727 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 11:44:20,727 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:20,746 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-28 11:44:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-28 11:44:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-28 11:44:20,747 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:20,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:20,896 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-28 11:44:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-28 11:44:20,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-04-28 11:44:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 11:44:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:20,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-28 11:44:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-28 11:44:20,899 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 58 transitions. [2022-04-28 11:44:20,959 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 58 edges. 58 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:20,960 INFO L225 Difference]: With dead ends: 60 [2022-04-28 11:44:20,960 INFO L226 Difference]: Without dead ends: 53 [2022-04-28 11:44:20,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-04-28 11:44:20,963 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 11:44:20,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 11:44:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-28 11:44:21,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-04-28 11:44:21,020 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 11:44:21,021 INFO L82 GeneralOperation]: Start isEquivalent. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) [2022-04-28 11:44:21,021 INFO L74 IsIncluded]: Start isIncluded. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) [2022-04-28 11:44:21,023 INFO L87 Difference]: Start difference. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) [2022-04-28 11:44:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:21,026 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-28 11:44:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-04-28 11:44:21,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:21,026 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:21,027 INFO L74 IsIncluded]: Start isIncluded. First operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) Second operand 53 states. [2022-04-28 11:44:21,027 INFO L87 Difference]: Start difference. First operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) Second operand 53 states. [2022-04-28 11:44:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 11:44:21,029 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-28 11:44:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-04-28 11:44:21,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 11:44:21,029 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 11:44:21,029 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 11:44:21,029 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 11:44:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 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) [2022-04-28 11:44:21,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-04-28 11:44:21,031 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2022-04-28 11:44:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 11:44:21,033 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-04-28 11:44:21,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 11:44:21,033 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 47 states and 55 transitions. [2022-04-28 11:44:21,092 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 11:44:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-04-28 11:44:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-28 11:44:21,093 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 11:44:21,093 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 11:44:21,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-28 11:44:21,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:21,311 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 11:44:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 11:44:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 1 times [2022-04-28 11:44:21,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 11:44:21,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [357093957] [2022-04-28 11:44:21,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 11:44:21,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 11:44:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 2 times [2022-04-28 11:44:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 11:44:21,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135473415] [2022-04-28 11:44:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 11:44:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 11:44:21,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 11:44:21,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505092050] [2022-04-28 11:44:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 11:44:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 11:44:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 11:44:21,339 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) [2022-04-28 11:44:21,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process