/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 06:09:10,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 06:09:10,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 06:09:10,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 06:09:10,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 06:09:10,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 06:09:10,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 06:09:10,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 06:09:10,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 06:09:10,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 06:09:10,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 06:09:10,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 06:09:10,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 06:09:10,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 06:09:10,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 06:09:10,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 06:09:10,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 06:09:10,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 06:09:10,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 06:09:10,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 06:09:10,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 06:09:10,848 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-28 06:09:10,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 06:09:10,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 06:09:10,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 06:09:10,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 06:09:10,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 06:09:10,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-28 06:09:10,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 06:09:10,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 06:09:10,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 06:09:10,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 06:09:10,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 06:09:10,859 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-28 06:09:10,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 06:09:11,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 06:09:11,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 06:09:11,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 06:09:11,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 06:09:11,040 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 06:09:11,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2022-04-28 06:09:11,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f41c2f6d/158200f2bf40478e80e7145f89d4b2ab/FLAG2a0953ef9 [2022-04-28 06:09:11,421 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 06:09:11,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2022-04-28 06:09:11,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f41c2f6d/158200f2bf40478e80e7145f89d4b2ab/FLAG2a0953ef9 [2022-04-28 06:09:11,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f41c2f6d/158200f2bf40478e80e7145f89d4b2ab [2022-04-28 06:09:11,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 06:09:11,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 06:09:11,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 06:09:11,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 06:09:11,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 06:09:11,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1e1e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11, skipping insertion in model container [2022-04-28 06:09:11,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 06:09:11,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 06:09:11,566 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/geo3-ll_unwindbound5.c[525,538] [2022-04-28 06:09:11,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 06:09:11,595 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 06:09:11,607 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/geo3-ll_unwindbound5.c[525,538] [2022-04-28 06:09:11,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 06:09:11,631 INFO L208 MainTranslator]: Completed translation [2022-04-28 06:09:11,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11 WrapperNode [2022-04-28 06:09:11,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 06:09:11,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 06:09:11,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 06:09:11,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 06:09:11,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 06:09:11,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 06:09:11,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 06:09:11,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 06:09:11,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (1/1) ... [2022-04-28 06:09:11,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 06:09:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:11,686 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 06:09:11,702 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 06:09:11,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 06:09:11,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 06:09:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 06:09:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 06:09:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 06:09:11,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 06:09:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 06:09:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 06:09:11,720 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 06:09:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 06:09:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 06:09:11,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 06:09:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 06:09:11,766 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 06:09:11,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 06:09:11,861 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 06:09:11,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 06:09:11,866 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 06:09:11,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 06:09:11 BoogieIcfgContainer [2022-04-28 06:09:11,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 06:09:11,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 06:09:11,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 06:09:11,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 06:09:11,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 06:09:11" (1/3) ... [2022-04-28 06:09:11,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5032b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 06:09:11, skipping insertion in model container [2022-04-28 06:09:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 06:09:11" (2/3) ... [2022-04-28 06:09:11,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5032b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 06:09:11, skipping insertion in model container [2022-04-28 06:09:11,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 06:09:11" (3/3) ... [2022-04-28 06:09:11,872 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound5.c [2022-04-28 06:09:11,880 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 06:09:11,881 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 06:09:11,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 06:09:11,913 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@23cdd22c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f4793c2 [2022-04-28 06:09:11,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 06:09:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 06:09:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-28 06:09:11,937 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:11,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:11,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-28 06:09:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:11,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119635257] [2022-04-28 06:09:11,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 06:09:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-28 06:09:11,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:11,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620887900] [2022-04-28 06:09:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:12,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:12,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83754362] [2022-04-28 06:09:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 06:09:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:12,082 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 06:09:12,123 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 06:09:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 06:09:12,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:09:12,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-28 06:09:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:09:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:09:12,252 INFO L272 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {25#true} is VALID [2022-04-28 06:09:12,252 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-28 06:09:12,253 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-28 06:09:12,253 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-28 06:09:12,253 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} call #t~ret8 := main(); {25#true} is VALID [2022-04-28 06:09:12,253 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {25#true} is VALID [2022-04-28 06:09:12,254 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2022-04-28 06:09:12,255 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {26#false} is VALID [2022-04-28 06:09:12,255 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2022-04-28 06:09:12,255 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2022-04-28 06:09:12,255 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2022-04-28 06:09:12,256 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 06:09:12,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 06:09:12,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:09:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620887900] [2022-04-28 06:09:12,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:09:12,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83754362] [2022-04-28 06:09:12,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83754362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:12,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:12,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-28 06:09:12,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:09:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119635257] [2022-04-28 06:09:12,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119635257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:12,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:12,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-28 06:09:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422566330] [2022-04-28 06:09:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:09:12,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-28 06:09:12,272 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:09:12,274 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 06:09:12,290 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-28 06:09:12,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-28 06:09:12,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-28 06:09:12,316 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 06:09:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,358 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-28 06:09:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-28 06:09:12,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-28 06:09:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:09:12,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 06:09:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 48 transitions. [2022-04-28 06:09:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 06:09:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 48 transitions. [2022-04-28 06:09:12,372 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 2 states and 48 transitions. [2022-04-28 06:09:12,418 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:12,424 INFO L225 Difference]: With dead ends: 38 [2022-04-28 06:09:12,424 INFO L226 Difference]: Without dead ends: 17 [2022-04-28 06:09:12,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-28 06:09:12,428 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 06:09:12,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 06:09:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-28 06:09:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-28 06:09:12,449 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:09:12,449 INFO L82 GeneralOperation]: Start isEquivalent. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 06:09:12,450 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 06:09:12,450 INFO L87 Difference]: Start difference. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 06:09:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,452 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-28 06:09:12,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 06:09:12,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:12,452 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:12,452 INFO L74 IsIncluded]: Start isIncluded. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 17 states. [2022-04-28 06:09:12,453 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 17 states. [2022-04-28 06:09:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,454 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-28 06:09:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 06:09:12,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:12,454 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:12,454 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:09:12,455 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:09:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 06:09:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-28 06:09:12,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-28 06:09:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:09:12,457 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-28 06:09:12,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 06:09:12,458 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 17 states and 19 transitions. [2022-04-28 06:09:12,471 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 06:09:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 06:09:12,472 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:12,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:12,488 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 06:09:12,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-28 06:09:12,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-28 06:09:12,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:12,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173456403] [2022-04-28 06:09:12,690 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 06:09:12,690 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-28 06:09:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029223962] [2022-04-28 06:09:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:12,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:12,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:12,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365898854] [2022-04-28 06:09:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 06:09:12,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:12,736 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 06:09:12,737 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 06:09:12,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 06:09:12,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:09:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 06:09:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:09:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:09:12,860 INFO L272 TraceCheckUtils]: 0: Hoare triple {203#true} call ULTIMATE.init(); {203#true} is VALID [2022-04-28 06:09:12,861 INFO L290 TraceCheckUtils]: 1: Hoare triple {203#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {211#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:12,862 INFO L290 TraceCheckUtils]: 2: Hoare triple {211#(<= ~counter~0 0)} assume true; {211#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:12,862 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {211#(<= ~counter~0 0)} {203#true} #54#return; {211#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:12,863 INFO L272 TraceCheckUtils]: 4: Hoare triple {211#(<= ~counter~0 0)} call #t~ret8 := main(); {211#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:12,863 INFO L290 TraceCheckUtils]: 5: Hoare triple {211#(<= ~counter~0 0)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {211#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:12,863 INFO L290 TraceCheckUtils]: 6: Hoare triple {211#(<= ~counter~0 0)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {227#(<= |main_#t~post7| 0)} is VALID [2022-04-28 06:09:12,864 INFO L290 TraceCheckUtils]: 7: Hoare triple {227#(<= |main_#t~post7| 0)} assume !(#t~post7 < 5);havoc #t~post7; {204#false} is VALID [2022-04-28 06:09:12,864 INFO L272 TraceCheckUtils]: 8: Hoare triple {204#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {204#false} is VALID [2022-04-28 06:09:12,864 INFO L290 TraceCheckUtils]: 9: Hoare triple {204#false} ~cond := #in~cond; {204#false} is VALID [2022-04-28 06:09:12,864 INFO L290 TraceCheckUtils]: 10: Hoare triple {204#false} assume 0 == ~cond; {204#false} is VALID [2022-04-28 06:09:12,865 INFO L290 TraceCheckUtils]: 11: Hoare triple {204#false} assume !false; {204#false} is VALID [2022-04-28 06:09:12,865 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 06:09:12,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 06:09:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:09:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029223962] [2022-04-28 06:09:12,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:09:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365898854] [2022-04-28 06:09:12,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365898854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:12,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:12,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 06:09:12,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:09:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173456403] [2022-04-28 06:09:12,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173456403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:12,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:12,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 06:09:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158645805] [2022-04-28 06:09:12,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:09:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-04-28 06:09:12,867 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:09:12,867 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 06:09:12,876 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 06:09:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 06:09:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 06:09:12,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 06:09:12,877 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 06:09:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,913 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-28 06:09:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 06:09:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-04-28 06:09:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:09:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 06:09:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 06:09:12,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 06:09:12,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 06:09:12,916 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-28 06:09:12,935 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 06:09:12,936 INFO L225 Difference]: With dead ends: 26 [2022-04-28 06:09:12,936 INFO L226 Difference]: Without dead ends: 19 [2022-04-28 06:09:12,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 06:09:12,937 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 06:09:12,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 06:09:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-28 06:09:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-28 06:09:12,943 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:09:12,943 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 06:09:12,943 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 06:09:12,944 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 06:09:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,945 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 06:09:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 06:09:12,945 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:12,945 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:12,945 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 19 states. [2022-04-28 06:09:12,946 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 19 states. [2022-04-28 06:09:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:12,947 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 06:09:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 06:09:12,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:12,947 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:12,947 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:09:12,947 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:09:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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 06:09:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-28 06:09:12,948 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-28 06:09:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:09:12,949 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-28 06:09:12,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 06:09:12,949 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 21 transitions. [2022-04-28 06:09:12,964 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 06:09:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 06:09:12,964 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:12,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:12,985 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 06:09:13,171 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,SelfDestructingSolverStorable1 [2022-04-28 06:09:13,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-28 06:09:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:13,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2005305355] [2022-04-28 06:09:13,173 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 06:09:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-28 06:09:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:13,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351700122] [2022-04-28 06:09:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:13,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:13,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001184493] [2022-04-28 06:09:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 06:09:13,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:13,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:13,185 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 06:09:13,186 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 06:09:13,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 06:09:13,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:09:13,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-28 06:09:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:09:13,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:09:13,312 INFO L272 TraceCheckUtils]: 0: Hoare triple {370#true} call ULTIMATE.init(); {370#true} is VALID [2022-04-28 06:09:13,312 INFO L290 TraceCheckUtils]: 1: Hoare triple {370#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {370#true} is VALID [2022-04-28 06:09:13,312 INFO L290 TraceCheckUtils]: 2: Hoare triple {370#true} assume true; {370#true} is VALID [2022-04-28 06:09:13,313 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {370#true} {370#true} #54#return; {370#true} is VALID [2022-04-28 06:09:13,313 INFO L272 TraceCheckUtils]: 4: Hoare triple {370#true} call #t~ret8 := main(); {370#true} is VALID [2022-04-28 06:09:13,313 INFO L290 TraceCheckUtils]: 5: Hoare triple {370#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:13,314 INFO L290 TraceCheckUtils]: 6: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:13,314 INFO L290 TraceCheckUtils]: 7: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 5);havoc #t~post7; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:13,315 INFO L272 TraceCheckUtils]: 8: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {400#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 06:09:13,316 INFO L290 TraceCheckUtils]: 9: Hoare triple {400#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {404#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:09:13,316 INFO L290 TraceCheckUtils]: 10: Hoare triple {404#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {371#false} is VALID [2022-04-28 06:09:13,316 INFO L290 TraceCheckUtils]: 11: Hoare triple {371#false} assume !false; {371#false} is VALID [2022-04-28 06:09:13,316 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 06:09:13,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 06:09:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:09:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351700122] [2022-04-28 06:09:13,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:09:13,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001184493] [2022-04-28 06:09:13,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001184493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:13,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:13,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 06:09:13,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:09:13,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2005305355] [2022-04-28 06:09:13,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2005305355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:13,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:13,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 06:09:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813092253] [2022-04-28 06:09:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:09:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-28 06:09:13,319 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:09:13,319 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 06:09:13,328 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 06:09:13,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 06:09:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 06:09:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 06:09:13,329 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 06:09:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:13,408 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 06:09:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 06:09:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-04-28 06:09:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:09:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 06:09:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 06:09:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 06:09:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 06:09:13,411 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-28 06:09:13,433 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:13,434 INFO L225 Difference]: With dead ends: 28 [2022-04-28 06:09:13,434 INFO L226 Difference]: Without dead ends: 25 [2022-04-28 06:09:13,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 06:09:13,435 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 06:09:13,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 06:09:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-28 06:09:13,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-28 06:09:13,444 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:09:13,444 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 06:09:13,444 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 06:09:13,445 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 06:09:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:13,446 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 06:09:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 06:09:13,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:13,446 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:13,446 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 25 states. [2022-04-28 06:09:13,446 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 25 states. [2022-04-28 06:09:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:13,447 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 06:09:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 06:09:13,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:13,448 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:13,448 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:09:13,448 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:09:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 06:09:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-28 06:09:13,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-28 06:09:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:09:13,449 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-28 06:09:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 06:09:13,449 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 27 transitions. [2022-04-28 06:09:13,475 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 06:09:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 06:09:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 06:09:13,476 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:13,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:13,509 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 06:09:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:13,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-28 06:09:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920578078] [2022-04-28 06:09:17,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 06:09:17,781 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 06:09:17,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 06:09:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 2 times [2022-04-28 06:09:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692056061] [2022-04-28 06:09:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:17,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:17,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818157836] [2022-04-28 06:09:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 06:09:17,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:17,791 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 06:09:17,792 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 06:09:17,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 06:09:17,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:09:17,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 06:09:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:09:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:09:17,927 INFO L272 TraceCheckUtils]: 0: Hoare triple {568#true} call ULTIMATE.init(); {568#true} is VALID [2022-04-28 06:09:17,928 INFO L290 TraceCheckUtils]: 1: Hoare triple {568#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {576#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:17,928 INFO L290 TraceCheckUtils]: 2: Hoare triple {576#(<= ~counter~0 0)} assume true; {576#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:17,928 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {576#(<= ~counter~0 0)} {568#true} #54#return; {576#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:17,929 INFO L272 TraceCheckUtils]: 4: Hoare triple {576#(<= ~counter~0 0)} call #t~ret8 := main(); {576#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:17,929 INFO L290 TraceCheckUtils]: 5: Hoare triple {576#(<= ~counter~0 0)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {576#(<= ~counter~0 0)} is VALID [2022-04-28 06:09:17,930 INFO L290 TraceCheckUtils]: 6: Hoare triple {576#(<= ~counter~0 0)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,930 INFO L290 TraceCheckUtils]: 7: Hoare triple {592#(<= ~counter~0 1)} assume !!(#t~post7 < 5);havoc #t~post7; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,931 INFO L272 TraceCheckUtils]: 8: Hoare triple {592#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,931 INFO L290 TraceCheckUtils]: 9: Hoare triple {592#(<= ~counter~0 1)} ~cond := #in~cond; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,931 INFO L290 TraceCheckUtils]: 10: Hoare triple {592#(<= ~counter~0 1)} assume !(0 == ~cond); {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,932 INFO L290 TraceCheckUtils]: 11: Hoare triple {592#(<= ~counter~0 1)} assume true; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,932 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {592#(<= ~counter~0 1)} {592#(<= ~counter~0 1)} #50#return; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,933 INFO L290 TraceCheckUtils]: 13: Hoare triple {592#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {592#(<= ~counter~0 1)} is VALID [2022-04-28 06:09:17,933 INFO L290 TraceCheckUtils]: 14: Hoare triple {592#(<= ~counter~0 1)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {617#(<= |main_#t~post7| 1)} is VALID [2022-04-28 06:09:17,933 INFO L290 TraceCheckUtils]: 15: Hoare triple {617#(<= |main_#t~post7| 1)} assume !(#t~post7 < 5);havoc #t~post7; {569#false} is VALID [2022-04-28 06:09:17,934 INFO L272 TraceCheckUtils]: 16: Hoare triple {569#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {569#false} is VALID [2022-04-28 06:09:17,934 INFO L290 TraceCheckUtils]: 17: Hoare triple {569#false} ~cond := #in~cond; {569#false} is VALID [2022-04-28 06:09:17,934 INFO L290 TraceCheckUtils]: 18: Hoare triple {569#false} assume 0 == ~cond; {569#false} is VALID [2022-04-28 06:09:17,934 INFO L290 TraceCheckUtils]: 19: Hoare triple {569#false} assume !false; {569#false} is VALID [2022-04-28 06:09:17,934 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 06:09:17,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 06:09:18,038 INFO L290 TraceCheckUtils]: 19: Hoare triple {569#false} assume !false; {569#false} is VALID [2022-04-28 06:09:18,038 INFO L290 TraceCheckUtils]: 18: Hoare triple {569#false} assume 0 == ~cond; {569#false} is VALID [2022-04-28 06:09:18,038 INFO L290 TraceCheckUtils]: 17: Hoare triple {569#false} ~cond := #in~cond; {569#false} is VALID [2022-04-28 06:09:18,038 INFO L272 TraceCheckUtils]: 16: Hoare triple {569#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {569#false} is VALID [2022-04-28 06:09:18,038 INFO L290 TraceCheckUtils]: 15: Hoare triple {645#(< |main_#t~post7| 5)} assume !(#t~post7 < 5);havoc #t~post7; {569#false} is VALID [2022-04-28 06:09:18,039 INFO L290 TraceCheckUtils]: 14: Hoare triple {649#(< ~counter~0 5)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {645#(< |main_#t~post7| 5)} is VALID [2022-04-28 06:09:18,039 INFO L290 TraceCheckUtils]: 13: Hoare triple {649#(< ~counter~0 5)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {649#(< ~counter~0 5)} is VALID [2022-04-28 06:09:18,040 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {568#true} {649#(< ~counter~0 5)} #50#return; {649#(< ~counter~0 5)} is VALID [2022-04-28 06:09:18,040 INFO L290 TraceCheckUtils]: 11: Hoare triple {568#true} assume true; {568#true} is VALID [2022-04-28 06:09:18,040 INFO L290 TraceCheckUtils]: 10: Hoare triple {568#true} assume !(0 == ~cond); {568#true} is VALID [2022-04-28 06:09:18,040 INFO L290 TraceCheckUtils]: 9: Hoare triple {568#true} ~cond := #in~cond; {568#true} is VALID [2022-04-28 06:09:18,040 INFO L272 TraceCheckUtils]: 8: Hoare triple {649#(< ~counter~0 5)} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {568#true} is VALID [2022-04-28 06:09:18,040 INFO L290 TraceCheckUtils]: 7: Hoare triple {649#(< ~counter~0 5)} assume !!(#t~post7 < 5);havoc #t~post7; {649#(< ~counter~0 5)} is VALID [2022-04-28 06:09:18,041 INFO L290 TraceCheckUtils]: 6: Hoare triple {674#(< ~counter~0 4)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {649#(< ~counter~0 5)} is VALID [2022-04-28 06:09:18,041 INFO L290 TraceCheckUtils]: 5: Hoare triple {674#(< ~counter~0 4)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {674#(< ~counter~0 4)} is VALID [2022-04-28 06:09:18,042 INFO L272 TraceCheckUtils]: 4: Hoare triple {674#(< ~counter~0 4)} call #t~ret8 := main(); {674#(< ~counter~0 4)} is VALID [2022-04-28 06:09:18,042 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {674#(< ~counter~0 4)} {568#true} #54#return; {674#(< ~counter~0 4)} is VALID [2022-04-28 06:09:18,042 INFO L290 TraceCheckUtils]: 2: Hoare triple {674#(< ~counter~0 4)} assume true; {674#(< ~counter~0 4)} is VALID [2022-04-28 06:09:18,043 INFO L290 TraceCheckUtils]: 1: Hoare triple {568#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {674#(< ~counter~0 4)} is VALID [2022-04-28 06:09:18,043 INFO L272 TraceCheckUtils]: 0: Hoare triple {568#true} call ULTIMATE.init(); {568#true} is VALID [2022-04-28 06:09:18,043 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 06:09:18,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:09:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692056061] [2022-04-28 06:09:18,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:09:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818157836] [2022-04-28 06:09:18,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818157836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 06:09:18,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 06:09:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-28 06:09:18,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:09:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920578078] [2022-04-28 06:09:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920578078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:18,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:18,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 06:09:18,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738192948] [2022-04-28 06:09:18,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:09:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2022-04-28 06:09:18,045 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:09:18,045 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 06:09:18,057 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 06:09:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:18,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 06:09:18,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-28 06:09:18,058 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 06:09:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:18,112 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-28 06:09:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 06:09:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 20 [2022-04-28 06:09:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:09:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 06:09:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-28 06:09:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 06:09:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-28 06:09:18,115 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 36 transitions. [2022-04-28 06:09:18,136 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:18,137 INFO L225 Difference]: With dead ends: 34 [2022-04-28 06:09:18,137 INFO L226 Difference]: Without dead ends: 27 [2022-04-28 06:09:18,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 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 06:09:18,137 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 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 06:09:18,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 06:09:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-28 06:09:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-28 06:09:18,149 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:09:18,149 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 06:09:18,149 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 06:09:18,150 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 06:09:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:18,151 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-28 06:09:18,151 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 06:09:18,151 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:18,151 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:18,151 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 27 states. [2022-04-28 06:09:18,151 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 27 states. [2022-04-28 06:09:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:18,152 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-28 06:09:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 06:09:18,153 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:18,153 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:18,153 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:09:18,153 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:09:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 06:09:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-04-28 06:09:18,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-04-28 06:09:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:09:18,154 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-04-28 06:09:18,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 06:09:18,154 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 29 transitions. [2022-04-28 06:09:18,175 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 29 edges. 29 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 06:09:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 06:09:18,176 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:18,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:18,192 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 06:09:18,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:18,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2022-04-28 06:09:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:18,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688071350] [2022-04-28 06:09:20,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 06:09:20,461 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 06:09:20,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 06:09:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 2 times [2022-04-28 06:09:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:20,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153184993] [2022-04-28 06:09:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:20,475 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:20,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603890615] [2022-04-28 06:09:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 06:09:20,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:20,482 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 06:09:20,483 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 06:09:20,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 06:09:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:09:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-28 06:09:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:09:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:09:20,779 INFO L272 TraceCheckUtils]: 0: Hoare triple {873#true} call ULTIMATE.init(); {873#true} is VALID [2022-04-28 06:09:20,780 INFO L290 TraceCheckUtils]: 1: Hoare triple {873#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {873#true} is VALID [2022-04-28 06:09:20,780 INFO L290 TraceCheckUtils]: 2: Hoare triple {873#true} assume true; {873#true} is VALID [2022-04-28 06:09:20,780 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {873#true} {873#true} #54#return; {873#true} is VALID [2022-04-28 06:09:20,780 INFO L272 TraceCheckUtils]: 4: Hoare triple {873#true} call #t~ret8 := main(); {873#true} is VALID [2022-04-28 06:09:20,780 INFO L290 TraceCheckUtils]: 5: Hoare triple {873#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,781 INFO L290 TraceCheckUtils]: 6: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,781 INFO L290 TraceCheckUtils]: 7: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 5);havoc #t~post7; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,781 INFO L272 TraceCheckUtils]: 8: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {873#true} is VALID [2022-04-28 06:09:20,782 INFO L290 TraceCheckUtils]: 9: Hoare triple {873#true} ~cond := #in~cond; {906#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:09:20,782 INFO L290 TraceCheckUtils]: 10: Hoare triple {906#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:09:20,782 INFO L290 TraceCheckUtils]: 11: Hoare triple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:09:20,783 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #50#return; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,784 INFO L290 TraceCheckUtils]: 13: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,784 INFO L290 TraceCheckUtils]: 14: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,784 INFO L290 TraceCheckUtils]: 15: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 5);havoc #t~post7; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-28 06:09:20,809 INFO L272 TraceCheckUtils]: 16: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {930#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 06:09:20,809 INFO L290 TraceCheckUtils]: 17: Hoare triple {930#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {934#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:09:20,810 INFO L290 TraceCheckUtils]: 18: Hoare triple {934#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {874#false} is VALID [2022-04-28 06:09:20,810 INFO L290 TraceCheckUtils]: 19: Hoare triple {874#false} assume !false; {874#false} is VALID [2022-04-28 06:09:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 06:09:20,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 06:09:42,398 INFO L290 TraceCheckUtils]: 19: Hoare triple {874#false} assume !false; {874#false} is VALID [2022-04-28 06:09:42,398 INFO L290 TraceCheckUtils]: 18: Hoare triple {934#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {874#false} is VALID [2022-04-28 06:09:42,399 INFO L290 TraceCheckUtils]: 17: Hoare triple {930#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {934#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:09:42,399 INFO L272 TraceCheckUtils]: 16: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {930#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 06:09:42,400 INFO L290 TraceCheckUtils]: 15: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(#t~post7 < 5);havoc #t~post7; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:09:42,400 INFO L290 TraceCheckUtils]: 14: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:09:42,425 INFO L290 TraceCheckUtils]: 13: Hoare triple {960#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:09:42,428 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} {873#true} #50#return; {960#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} is VALID [2022-04-28 06:09:42,429 INFO L290 TraceCheckUtils]: 11: Hoare triple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:09:42,431 INFO L290 TraceCheckUtils]: 10: Hoare triple {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:09:42,431 INFO L290 TraceCheckUtils]: 9: Hoare triple {873#true} ~cond := #in~cond; {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 06:09:42,431 INFO L272 TraceCheckUtils]: 8: Hoare triple {873#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {873#true} is VALID [2022-04-28 06:09:42,432 INFO L290 TraceCheckUtils]: 7: Hoare triple {873#true} assume !!(#t~post7 < 5);havoc #t~post7; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L290 TraceCheckUtils]: 6: Hoare triple {873#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L290 TraceCheckUtils]: 5: Hoare triple {873#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L272 TraceCheckUtils]: 4: Hoare triple {873#true} call #t~ret8 := main(); {873#true} is VALID [2022-04-28 06:09:42,432 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {873#true} {873#true} #54#return; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L290 TraceCheckUtils]: 2: Hoare triple {873#true} assume true; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L290 TraceCheckUtils]: 1: Hoare triple {873#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {873#true} is VALID [2022-04-28 06:09:42,432 INFO L272 TraceCheckUtils]: 0: Hoare triple {873#true} call ULTIMATE.init(); {873#true} is VALID [2022-04-28 06:09:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 06:09:42,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:09:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153184993] [2022-04-28 06:09:42,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:09:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603890615] [2022-04-28 06:09:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603890615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 06:09:42,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 06:09:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-28 06:09:42,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:09:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [688071350] [2022-04-28 06:09:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [688071350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:09:42,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:09:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-28 06:09:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782323191] [2022-04-28 06:09:42,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:09:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 20 [2022-04-28 06:09:42,434 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:09:42,434 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 06:09:42,463 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:42,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-28 06:09:42,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:42,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-28 06:09:42,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-28 06:09:42,464 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 06:09:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:43,186 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-28 06:09:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-28 06:09:43,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 20 [2022-04-28 06:09:43,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:09:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 06:09:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-28 06:09:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 06:09:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-28 06:09:43,189 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 36 transitions. [2022-04-28 06:09:43,241 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:43,241 INFO L225 Difference]: With dead ends: 36 [2022-04-28 06:09:43,241 INFO L226 Difference]: Without dead ends: 33 [2022-04-28 06:09:43,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-28 06:09:43,242 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-28 06:09:43,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-28 06:09:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-28 06:09:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-28 06:09:43,257 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:09:43,257 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 06:09:43,257 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 06:09:43,257 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 06:09:43,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:43,258 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 06:09:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 06:09:43,259 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:43,259 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:43,259 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 33 states. [2022-04-28 06:09:43,259 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 33 states. [2022-04-28 06:09:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:09:43,260 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 06:09:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 06:09:43,260 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:09:43,260 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:09:43,260 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:09:43,260 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:09:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 06:09:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-28 06:09:43,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-04-28 06:09:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:09:43,261 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-28 06:09:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 06:09:43,262 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 35 transitions. [2022-04-28 06:09:43,302 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:09:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 06:09:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-28 06:09:43,303 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 06:09:43,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 06:09:43,320 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 06:09:43,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:43,504 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 06:09:43,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 06:09:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 3 times [2022-04-28 06:09:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 06:09:43,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [56964063] [2022-04-28 06:09:45,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 06:09:45,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 06:09:45,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 06:09:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 4 times [2022-04-28 06:09:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 06:09:45,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307734902] [2022-04-28 06:09:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 06:09:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 06:09:45,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 06:09:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181963827] [2022-04-28 06:09:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-28 06:09:45,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:09:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 06:09:45,820 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 06:09:45,820 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 06:10:01,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-28 06:10:01,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 06:10:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-28 06:10:01,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 06:10:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 06:10:11,647 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:10:18,979 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:10:31,013 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:10:41,565 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (= c_main_~z~0 0)) (.cse0 (+ (* (- 1) c_main_~a~0) c_main_~x~0))) (or (and (= (mod .cse0 c_main_~z~0) 0) (let ((.cse1 (= c_main_~az~0 0)) (.cse2 (let ((.cse3 (div .cse0 c_main_~z~0))) (+ (* .cse3 c_main_~z~0) (* (- 1) .cse3) c_main_~a~0)))) (or (and (= (mod c_main_~y~0 c_main_~z~0) 0) .cse1 (= .cse2 0)) (and (= (* (div .cse2 c_main_~az~0) c_main_~z~0) c_main_~y~0) (not .cse1) (= (mod .cse2 c_main_~az~0) 0)))) (not .cse4)) (and (= c_main_~y~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ c_main_~a~0 (* v_main_~x~0_29 c_main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 c_main_~az~0)))) .cse4 (= 0 .cse0)))) is different from false [2022-04-28 06:11:24,950 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse0 (+ (* (- 1) c_main_~a~0) c_main_~x~0))) (or (and (= c_main_~y~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ c_main_~a~0 (* v_main_~x~0_29 c_main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 c_main_~az~0)))) (= 0 .cse0)) (and (= (mod .cse0 c_main_~z~0) 0) (let ((.cse1 (let ((.cse2 (div .cse0 c_main_~z~0))) (+ (* .cse2 c_main_~z~0) (* (- 1) .cse2) c_main_~a~0)))) (or (and (= (mod c_main_~y~0 c_main_~z~0) 0) (= .cse1 0)) (and (= (* (div .cse1 c_main_~az~0) c_main_~z~0) c_main_~y~0) (not (= c_main_~az~0 0))))) (not (= c_main_~z~0 0))))) (= (+ (* c_main_~x~0 c_main_~z~0) c_main_~a~0) (+ (* c_main_~y~0 c_main_~az~0) c_main_~x~0))) is different from false [2022-04-28 06:11:39,154 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:11:47,897 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:11:53,910 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:11:58,959 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 06:12:50,338 WARN L232 SmtUtils]: Spent 37.10s on a formula simplification. DAG size of input: 57 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-28 06:13:11,447 INFO L272 TraceCheckUtils]: 0: Hoare triple {1211#true} call ULTIMATE.init(); {1211#true} is VALID [2022-04-28 06:13:11,447 INFO L290 TraceCheckUtils]: 1: Hoare triple {1211#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1211#true} is VALID [2022-04-28 06:13:11,447 INFO L290 TraceCheckUtils]: 2: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1211#true} {1211#true} #54#return; {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L272 TraceCheckUtils]: 4: Hoare triple {1211#true} call #t~ret8 := main(); {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L290 TraceCheckUtils]: 5: Hoare triple {1211#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L290 TraceCheckUtils]: 6: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L290 TraceCheckUtils]: 7: Hoare triple {1211#true} assume !!(#t~post7 < 5);havoc #t~post7; {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L272 TraceCheckUtils]: 8: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-28 06:13:11,448 INFO L290 TraceCheckUtils]: 9: Hoare triple {1211#true} ~cond := #in~cond; {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:13:11,449 INFO L290 TraceCheckUtils]: 10: Hoare triple {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:11,449 INFO L290 TraceCheckUtils]: 11: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:11,450 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1211#true} #50#return; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:13:13,458 WARN L290 TraceCheckUtils]: 13: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is UNKNOWN [2022-04-28 06:13:13,460 INFO L290 TraceCheckUtils]: 14: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is VALID [2022-04-28 06:13:13,476 INFO L290 TraceCheckUtils]: 15: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} assume !!(#t~post7 < 5);havoc #t~post7; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is VALID [2022-04-28 06:13:13,476 INFO L272 TraceCheckUtils]: 16: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-28 06:13:13,477 INFO L290 TraceCheckUtils]: 17: Hoare triple {1211#true} ~cond := #in~cond; {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:13:13,477 INFO L290 TraceCheckUtils]: 18: Hoare triple {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:13,477 INFO L290 TraceCheckUtils]: 19: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:13,480 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} #50#return; {1280#(and (or (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (or (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))))) (and (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))} is VALID [2022-04-28 06:13:15,482 WARN L290 TraceCheckUtils]: 21: Hoare triple {1280#(and (or (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (or (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))))) (and (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} is UNKNOWN [2022-04-28 06:13:15,484 INFO L290 TraceCheckUtils]: 22: Hoare triple {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} is VALID [2022-04-28 06:13:15,486 INFO L290 TraceCheckUtils]: 23: Hoare triple {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} assume !(#t~post7 < 5);havoc #t~post7; {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} is VALID [2022-04-28 06:13:15,600 INFO L272 TraceCheckUtils]: 24: Hoare triple {1284#(or (and (= (* main_~a~0 main_~z~0) 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))) (= main_~az~0 0))) (not (= main_~z~0 0))))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 06:13:15,601 INFO L290 TraceCheckUtils]: 25: Hoare triple {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1298#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:13:15,601 INFO L290 TraceCheckUtils]: 26: Hoare triple {1298#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1212#false} is VALID [2022-04-28 06:13:15,601 INFO L290 TraceCheckUtils]: 27: Hoare triple {1212#false} assume !false; {1212#false} is VALID [2022-04-28 06:13:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2022-04-28 06:13:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 06:13:26,644 INFO L290 TraceCheckUtils]: 27: Hoare triple {1212#false} assume !false; {1212#false} is VALID [2022-04-28 06:13:26,645 INFO L290 TraceCheckUtils]: 26: Hoare triple {1298#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1212#false} is VALID [2022-04-28 06:13:26,645 INFO L290 TraceCheckUtils]: 25: Hoare triple {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1298#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 06:13:26,646 INFO L272 TraceCheckUtils]: 24: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 06:13:26,646 INFO L290 TraceCheckUtils]: 23: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !(#t~post7 < 5);havoc #t~post7; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:13:26,647 INFO L290 TraceCheckUtils]: 22: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:13:26,682 INFO L290 TraceCheckUtils]: 21: Hoare triple {1323#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-28 06:13:26,685 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1211#true} #50#return; {1323#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} is VALID [2022-04-28 06:13:26,685 INFO L290 TraceCheckUtils]: 19: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:26,685 INFO L290 TraceCheckUtils]: 18: Hoare triple {1336#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 17: Hoare triple {1211#true} ~cond := #in~cond; {1336#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 06:13:26,686 INFO L272 TraceCheckUtils]: 16: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 15: Hoare triple {1211#true} assume !!(#t~post7 < 5);havoc #t~post7; {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 14: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 13: Hoare triple {1211#true} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1211#true} {1211#true} #50#return; {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 11: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 10: Hoare triple {1211#true} assume !(0 == ~cond); {1211#true} is VALID [2022-04-28 06:13:26,686 INFO L290 TraceCheckUtils]: 9: Hoare triple {1211#true} ~cond := #in~cond; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L272 TraceCheckUtils]: 8: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L290 TraceCheckUtils]: 7: Hoare triple {1211#true} assume !!(#t~post7 < 5);havoc #t~post7; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L290 TraceCheckUtils]: 6: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L290 TraceCheckUtils]: 5: Hoare triple {1211#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L272 TraceCheckUtils]: 4: Hoare triple {1211#true} call #t~ret8 := main(); {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1211#true} {1211#true} #54#return; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L290 TraceCheckUtils]: 2: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L290 TraceCheckUtils]: 1: Hoare triple {1211#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);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L272 TraceCheckUtils]: 0: Hoare triple {1211#true} call ULTIMATE.init(); {1211#true} is VALID [2022-04-28 06:13:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 06:13:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 06:13:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307734902] [2022-04-28 06:13:26,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 06:13:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181963827] [2022-04-28 06:13:26,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181963827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 06:13:26,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 06:13:26,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2022-04-28 06:13:26,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 06:13:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [56964063] [2022-04-28 06:13:26,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [56964063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 06:13:26,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 06:13:26,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-28 06:13:26,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168561393] [2022-04-28 06:13:26,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 06:13:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-28 06:13:26,689 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 06:13:26,689 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 06:13:32,748 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 22 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-28 06:13:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-28 06:13:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 06:13:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-28 06:13:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=67, Unknown=3, NotChecked=34, Total=132 [2022-04-28 06:13:32,749 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 06:13:38,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 06:13:40,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 06:14:42,458 WARN L232 SmtUtils]: Spent 56.38s on a formula simplification. DAG size of input: 66 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-28 06:14:45,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 06:14:47,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 06:14:49,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 06:14:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:14:53,094 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 06:14:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-28 06:14:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-28 06:14:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 06:14:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 06:14:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 32 transitions. [2022-04-28 06:14:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 06:14:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 32 transitions. [2022-04-28 06:14:53,096 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 11 states and 32 transitions. [2022-04-28 06:15:03,401 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 28 inductive. 0 not inductive. 4 times theorem prover too weak to decide inductivity. [2022-04-28 06:15:03,401 INFO L225 Difference]: With dead ends: 33 [2022-04-28 06:15:03,402 INFO L226 Difference]: Without dead ends: 0 [2022-04-28 06:15:03,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 105.2s TimeCoverageRelationStatistics Valid=46, Invalid=114, Unknown=4, NotChecked=46, Total=210 [2022-04-28 06:15:03,402 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-04-28 06:15:03,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 91 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 4 Unknown, 35 Unchecked, 11.5s Time] [2022-04-28 06:15:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-28 06:15:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-28 06:15:03,403 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 06:15:03,403 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 06:15:03,403 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 06:15:03,403 INFO L87 Difference]: Start difference. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 06:15:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:15:03,403 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 06:15:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 06:15:03,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:15:03,403 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:15:03,403 INFO L74 IsIncluded]: Start isIncluded. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 06:15:03,403 INFO L87 Difference]: Start difference. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 06:15:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 06:15:03,404 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:15:03,404 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 06:15:03,404 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 06:15:03,404 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 06:15:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 06:15:03,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-04-28 06:15:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 06:15:03,404 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 06:15:03,404 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 06:15:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 06:15:03,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 06:15:03,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 06:15:03,414 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 06:15:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 06:15:03,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-28 06:15:37,215 WARN L232 SmtUtils]: Spent 33.56s on a formula simplification. DAG size of input: 87 DAG size of output: 72 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-28 06:16:44,285 WARN L232 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 86 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-28 06:17:13,537 WARN L232 SmtUtils]: Spent 29.24s on a formula simplification. DAG size of input: 87 DAG size of output: 74 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-28 06:17:19,092 WARN L232 SmtUtils]: Spent 5.54s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-28 06:18:08,571 WARN L232 SmtUtils]: Spent 49.44s on a formula simplification. DAG size of input: 83 DAG size of output: 67 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-28 06:18:08,600 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-28 06:18:08,601 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point L34-1(lines 34 43) the Hoare annotation is: (let ((.cse12 (* main_~a~0 main_~z~0))) (let ((.cse0 (= .cse12 main_~az~0))) (or (and (<= ~counter~0 1) (= main_~y~0 1) (<= |main_#t~post7| 0) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse0) (let ((.cse11 (* (- 1) main_~a~0))) (let ((.cse3 (+ .cse11 main_~x~0))) (let ((.cse4 (div .cse3 main_~z~0))) (let ((.cse5 (* .cse4 main_~z~0))) (let ((.cse6 (+ (* (- 1) .cse4) main_~a~0 .cse5))) (let ((.cse9 (div .cse6 main_~az~0))) (let ((.cse7 (= main_~az~0 0)) (.cse8 (= (* .cse9 main_~z~0) main_~y~0)) (.cse2 (= main_~y~0 0))) (and (let ((.cse1 (= main_~z~0 0))) (or (and .cse1 .cse2 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse3 main_~z~0)) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse4 (+ main_~a~0 .cse5))) (and (= (mod .cse6 main_~az~0) 0) (not .cse7) .cse8)) (not .cse1)))) (or (and (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) .cse7) (and (= .cse9 (* main_~z~0 (div (let ((.cse10 (div (+ .cse4 .cse11) main_~z~0))) (+ (* (- 1) .cse10) main_~a~0 (* main_~z~0 .cse10))) main_~az~0))) .cse8) .cse2))))))))) (not (<= |old(~counter~0)| 0)) (and (<= |main_#t~post7| 1) (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse12 main_~a~0)) .cse0)))) [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse12 (* main_~a~0 main_~z~0))) (let ((.cse11 (= .cse12 main_~az~0))) (or (let ((.cse10 (* (- 1) main_~a~0))) (let ((.cse2 (+ .cse10 main_~x~0))) (let ((.cse3 (div .cse2 main_~z~0))) (let ((.cse4 (* .cse3 main_~z~0))) (let ((.cse5 (+ (* (- 1) .cse3) main_~a~0 .cse4))) (let ((.cse8 (div .cse5 main_~az~0))) (let ((.cse6 (= main_~az~0 0)) (.cse7 (= (* .cse8 main_~z~0) main_~y~0)) (.cse1 (= main_~y~0 0))) (and (let ((.cse0 (= main_~z~0 0))) (or (and .cse0 .cse1 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse2 main_~z~0)) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse3 (+ main_~a~0 .cse4))) (and (= (mod .cse5 main_~az~0) 0) (not .cse6) .cse7)) (not .cse0)))) (or (and (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) .cse6) (and (= .cse8 (* main_~z~0 (div (let ((.cse9 (div (+ .cse3 .cse10) main_~z~0))) (+ (* (- 1) .cse9) main_~a~0 (* main_~z~0 .cse9))) main_~az~0))) .cse7) .cse1))))))))) (not (<= |old(~counter~0)| 0)) (and (= main_~y~0 1) (<= ~counter~0 0) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse11) (and (= main_~z~0 main_~y~0) (<= ~counter~0 1) (= main_~x~0 (+ .cse12 main_~a~0)) .cse11)))) [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (let ((.cse2 (* main_~a~0 main_~z~0))) (let ((.cse0 (= main_~a~0 main_~x~0)) (.cse1 (= .cse2 main_~az~0))) (or (and (= main_~y~0 1) .cse0 .cse1) (and (= .cse2 0) (= main_~y~0 0) .cse0) (not (<= |old(~counter~0)| 0)) (and (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse2 main_~a~0)) .cse1) (let ((.cse7 (* (- 1) main_~a~0))) (let ((.cse3 (+ .cse7 main_~x~0))) (and (= 0 (mod .cse3 main_~z~0)) (let ((.cse6 (div .cse3 main_~z~0))) (let ((.cse10 (* .cse6 main_~z~0)) (.cse9 (= main_~az~0 0))) (or (let ((.cse8 (+ (* (- 1) .cse6) main_~a~0 .cse10))) (let ((.cse4 (div .cse8 main_~az~0))) (and (= .cse4 (* main_~z~0 (div (let ((.cse5 (div (+ .cse6 .cse7) main_~z~0))) (+ (* (- 1) .cse5) main_~a~0 (* main_~z~0 .cse5))) main_~az~0))) (= (mod .cse8 main_~az~0) 0) (not .cse9) (= (* .cse4 main_~z~0) main_~y~0)))) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= .cse6 (+ main_~a~0 .cse10)) .cse9)))) (not (= main_~z~0 0)))))))) [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2022-04-28 06:18:08,601 INFO L902 garLoopResultBuilder]: At program point mainEXIT(lines 22 46) the Hoare annotation is: true [2022-04-28 06:18:08,601 INFO L902 garLoopResultBuilder]: At program point mainFINAL(lines 22 46) the Hoare annotation is: true [2022-04-28 06:18:08,601 INFO L902 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: true [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse11 (* main_~a~0 main_~z~0))) (let ((.cse12 (= .cse11 main_~az~0))) (or (let ((.cse10 (* (- 1) main_~a~0))) (let ((.cse2 (+ .cse10 main_~x~0))) (let ((.cse3 (div .cse2 main_~z~0))) (let ((.cse4 (* .cse3 main_~z~0))) (let ((.cse5 (+ (* (- 1) .cse3) main_~a~0 .cse4))) (let ((.cse8 (div .cse5 main_~az~0))) (let ((.cse6 (= main_~az~0 0)) (.cse7 (= (* .cse8 main_~z~0) main_~y~0)) (.cse1 (= main_~y~0 0))) (and (let ((.cse0 (= main_~z~0 0))) (or (and .cse0 .cse1 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse2 main_~z~0)) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse3 (+ main_~a~0 .cse4))) (and (= (mod .cse5 main_~az~0) 0) (not .cse6) .cse7)) (not .cse0)))) (or (and (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) .cse6) (and (= .cse8 (* main_~z~0 (div (let ((.cse9 (div (+ .cse3 .cse10) main_~z~0))) (+ (* (- 1) .cse9) main_~a~0 (* main_~z~0 .cse9))) main_~az~0))) .cse7) .cse1))))))))) (not (<= |old(~counter~0)| 0)) (and (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse11 main_~a~0)) .cse12) (and (<= ~counter~0 1) (= main_~y~0 1) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse12)))) [2022-04-28 06:18:08,601 INFO L895 garLoopResultBuilder]: At program point L35-1(lines 34 43) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~z~0))) (let ((.cse1 (= .cse0 main_~az~0))) (or (and (= .cse0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)) (not (<= |old(~counter~0)| 0)) (and (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse0 main_~a~0)) .cse1) (and (<= ~counter~0 1) (= main_~y~0 1) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse1) (let ((.cse6 (* (- 1) main_~a~0))) (let ((.cse2 (+ .cse6 main_~x~0))) (and (= 0 (mod .cse2 main_~z~0)) (let ((.cse5 (div .cse2 main_~z~0))) (let ((.cse9 (* .cse5 main_~z~0)) (.cse8 (= main_~az~0 0))) (or (let ((.cse7 (+ (* (- 1) .cse5) main_~a~0 .cse9))) (let ((.cse3 (div .cse7 main_~az~0))) (and (= .cse3 (* main_~z~0 (div (let ((.cse4 (div (+ .cse5 .cse6) main_~z~0))) (+ (* (- 1) .cse4) main_~a~0 (* main_~z~0 .cse4))) main_~az~0))) (= (mod .cse7 main_~az~0) 0) (not .cse8) (= (* .cse3 main_~z~0) main_~y~0)))) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= .cse5 (+ main_~a~0 .cse9)) .cse8)))) (not (= main_~z~0 0)))))))) [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 06:18:08,602 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 06:18:08,602 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 06:18:08,602 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-28 06:18:08,602 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 06:18:08,602 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 06:18:08,602 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-28 06:18:08,604 INFO L356 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2] [2022-04-28 06:18:08,605 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 06:18:08,607 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-28 06:18:08,608 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-28 06:18:08,618 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-28 06:18:08,619 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-28 06:18:08,619 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-28 06:18:08,624 WARN L170 areAnnotationChecker]: L12-2 has no Hoare annotation [2022-04-28 06:18:13,466 INFO L163 areAnnotationChecker]: CFG has 26 edges. 25 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-28 06:18:13,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 06:18:13 BoogieIcfgContainer [2022-04-28 06:18:13,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 06:18:13,480 INFO L158 Benchmark]: Toolchain (without parser) took 542044.87ms. Allocated memory was 173.0MB in the beginning and 222.3MB in the end (delta: 49.3MB). Free memory was 123.7MB in the beginning and 142.7MB in the end (delta: -19.0MB). Peak memory consumption was 99.9MB. Max. memory is 8.0GB. [2022-04-28 06:18:13,481 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 06:18:13,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.28ms. Allocated memory is still 173.0MB. Free memory was 123.4MB in the beginning and 148.0MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-28 06:18:13,481 INFO L158 Benchmark]: Boogie Preprocessor took 33.05ms. Allocated memory is still 173.0MB. Free memory was 148.0MB in the beginning and 146.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-28 06:18:13,481 INFO L158 Benchmark]: RCFGBuilder took 201.23ms. Allocated memory is still 173.0MB. Free memory was 146.5MB in the beginning and 135.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-28 06:18:13,481 INFO L158 Benchmark]: TraceAbstraction took 541611.71ms. Allocated memory was 173.0MB in the beginning and 222.3MB in the end (delta: 49.3MB). Free memory was 135.0MB in the beginning and 142.7MB in the end (delta: -7.7MB). Peak memory consumption was 112.9MB. Max. memory is 8.0GB. [2022-04-28 06:18:13,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.28ms. Allocated memory is still 173.0MB. Free memory was 123.4MB in the beginning and 148.0MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.05ms. Allocated memory is still 173.0MB. Free memory was 148.0MB in the beginning and 146.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 201.23ms. Allocated memory is still 173.0MB. Free memory was 146.5MB in the beginning and 135.5MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 541611.71ms. Allocated memory was 173.0MB in the beginning and 222.3MB in the end (delta: 49.3MB). Free memory was 135.0MB in the beginning and 142.7MB in the end (delta: -7.7MB). Peak memory consumption was 112.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 536.7s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 91.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 185.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 11.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 347 SdHoareTripleChecker+Invalid, 11.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 239 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 138 IncrementalHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 108 mSDtfsCounter, 138 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 105.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=5, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 76 PreInvPairs, 120 NumberOfFragments, 1251 HoareAnnotationTreeSize, 76 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 634 FormulaSimplificationTreeSizeReductionInter, 184.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((z == 0 && y == 0) && a == x) || ((0 == (-1 * a + x) % z && ((y % z == 0 && (-1 * a + x) / z == a + (-1 * a + x) / z * z) || (((-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) % az == 0 && !(az == 0)) && (-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az * z == y))) && !(z == 0))) && (((y / z % z == 0 && az == 0) || ((-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az == z * ((-1 * (((-1 * a + x) / z + -1 * a) / z) + a + z * (((-1 * a + x) / z + -1 * a) / z)) / az) && (-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az * z == y)) || y == 0)) || !(\old(counter) <= 0)) || (((y == 1 && counter <= 0) && y * az + x == z * x + a) && a * z == az)) || (((z == y && counter <= 1) && x == a * z + a) && a * z == az) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-28 06:18:13,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...