/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 13:56:42,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 13:56:42,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 13:56:42,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 13:56:42,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 13:56:42,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 13:56:42,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 13:56:42,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 13:56:42,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 13:56:42,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 13:56:42,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 13:56:42,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 13:56:42,591 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 13:56:42,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 13:56:42,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 13:56:42,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 13:56:42,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 13:56:42,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 13:56:42,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 13:56:42,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 13:56:42,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 13:56:42,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-28 13:56:42,617 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 13:56:42,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 13:56:42,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 13:56:42,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 13:56:42,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 13:56:42,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 13:56:42,619 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 13:56:42,620 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 13:56:42,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 13:56:42,620 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-28 13:56:42,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 13:56:42,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 13:56:42,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 13:56:42,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 13:56:42,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 13:56:42,816 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 13:56:42,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2022-04-28 13:56:42,854 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e637aa5d/27685eac559448ba81a3f50b5e3ef251/FLAG6efe18ef2 [2022-04-28 13:56:43,165 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 13:56:43,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound2.c [2022-04-28 13:56:43,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e637aa5d/27685eac559448ba81a3f50b5e3ef251/FLAG6efe18ef2 [2022-04-28 13:56:43,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e637aa5d/27685eac559448ba81a3f50b5e3ef251 [2022-04-28 13:56:43,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 13:56:43,607 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 13:56:43,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 13:56:43,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 13:56:43,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 13:56:43,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ebc7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43, skipping insertion in model container [2022-04-28 13:56:43,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 13:56:43,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 13:56:43,765 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/mannadiv_unwindbound2.c[573,586] [2022-04-28 13:56:43,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 13:56:43,792 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 13:56:43,799 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/mannadiv_unwindbound2.c[573,586] [2022-04-28 13:56:43,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 13:56:43,815 INFO L208 MainTranslator]: Completed translation [2022-04-28 13:56:43,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43 WrapperNode [2022-04-28 13:56:43,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 13:56:43,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 13:56:43,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 13:56:43,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 13:56:43,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 13:56:43,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 13:56:43,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 13:56:43,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 13:56:43,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (1/1) ... [2022-04-28 13:56:43,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 13:56:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:43,881 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 13:56:43,903 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 13:56:43,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 13:56:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 13:56:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 13:56:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 13:56:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 13:56:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 13:56:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 13:56:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 13:56:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 13:56:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 13:56:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 13:56:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 13:56:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 13:56:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 13:56:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 13:56:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 13:56:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 13:56:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 13:56:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 13:56:43,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 13:56:43,970 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 13:56:43,972 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 13:56:44,090 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 13:56:44,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 13:56:44,113 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 13:56:44,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 01:56:44 BoogieIcfgContainer [2022-04-28 13:56:44,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 13:56:44,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 13:56:44,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 13:56:44,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 13:56:44,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 01:56:43" (1/3) ... [2022-04-28 13:56:44,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ec322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 01:56:44, skipping insertion in model container [2022-04-28 13:56:44,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 01:56:43" (2/3) ... [2022-04-28 13:56:44,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ec322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 01:56:44, skipping insertion in model container [2022-04-28 13:56:44,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 01:56:44" (3/3) ... [2022-04-28 13:56:44,139 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound2.c [2022-04-28 13:56:44,156 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 13:56:44,156 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 13:56:44,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 13:56:44,207 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@4ea0df72, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@405fede9 [2022-04-28 13:56:44,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 13:56:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-28 13:56:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-28 13:56:44,223 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:44,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:44,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-04-28 13:56:44,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:44,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179950005] [2022-04-28 13:56:44,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:44,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-04-28 13:56:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967784870] [2022-04-28 13:56:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 13:56:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:44,458 INFO L290 TraceCheckUtils]: 0: Hoare triple {46#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-28 13:56:44,459 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-28 13:56:44,460 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #67#return; {33#true} is VALID [2022-04-28 13:56:44,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-28 13:56:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:44,476 INFO L290 TraceCheckUtils]: 0: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-28 13:56:44,477 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-28 13:56:44,477 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-28 13:56:44,477 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-28 13:56:44,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-28 13:56:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:44,487 INFO L290 TraceCheckUtils]: 0: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-28 13:56:44,488 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-28 13:56:44,488 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-28 13:56:44,489 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#false} {34#false} #61#return; {34#false} is VALID [2022-04-28 13:56:44,490 INFO L272 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {46#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 13:56:44,490 INFO L290 TraceCheckUtils]: 1: Hoare triple {46#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-28 13:56:44,490 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-28 13:56:44,491 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #67#return; {33#true} is VALID [2022-04-28 13:56:44,491 INFO L272 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret7 := main(); {33#true} is VALID [2022-04-28 13:56:44,491 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#true} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {33#true} is VALID [2022-04-28 13:56:44,491 INFO L272 TraceCheckUtils]: 6: Hoare triple {33#true} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {33#true} is VALID [2022-04-28 13:56:44,491 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-28 13:56:44,493 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-28 13:56:44,493 INFO L290 TraceCheckUtils]: 9: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-28 13:56:44,493 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-28 13:56:44,493 INFO L272 TraceCheckUtils]: 11: Hoare triple {34#false} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {33#true} is VALID [2022-04-28 13:56:44,493 INFO L290 TraceCheckUtils]: 12: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-28 13:56:44,494 INFO L290 TraceCheckUtils]: 13: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-28 13:56:44,494 INFO L290 TraceCheckUtils]: 14: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-28 13:56:44,494 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {34#false} {34#false} #61#return; {34#false} is VALID [2022-04-28 13:56:44,494 INFO L290 TraceCheckUtils]: 16: Hoare triple {34#false} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {34#false} is VALID [2022-04-28 13:56:44,495 INFO L290 TraceCheckUtils]: 17: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-28 13:56:44,496 INFO L272 TraceCheckUtils]: 18: Hoare triple {34#false} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {34#false} is VALID [2022-04-28 13:56:44,496 INFO L290 TraceCheckUtils]: 19: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2022-04-28 13:56:44,496 INFO L290 TraceCheckUtils]: 20: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2022-04-28 13:56:44,496 INFO L290 TraceCheckUtils]: 21: Hoare triple {34#false} assume !false; {34#false} is VALID [2022-04-28 13:56:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:44,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 13:56:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967784870] [2022-04-28 13:56:44,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967784870] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:44,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:44,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 13:56:44,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 13:56:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179950005] [2022-04-28 13:56:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179950005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:44,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:44,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 13:56:44,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613979479] [2022-04-28 13:56:44,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 13:56:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-28 13:56:44,508 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 13:56:44,510 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:44,534 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 13:56:44,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 13:56:44,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 13:56:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 13:56:44,557 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:44,701 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-04-28 13:56:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 13:56:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-28 13:56:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 13:56:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2022-04-28 13:56:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2022-04-28 13:56:44,719 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 72 transitions. [2022-04-28 13:56:44,792 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 72 edges. 72 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:44,798 INFO L225 Difference]: With dead ends: 54 [2022-04-28 13:56:44,798 INFO L226 Difference]: Without dead ends: 26 [2022-04-28 13:56:44,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 13:56:44,802 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 13:56:44,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 13:56:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-28 13:56:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-28 13:56:44,822 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 13:56:44,823 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:44,823 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:44,824 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:44,827 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-28 13:56:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-28 13:56:44,827 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:44,827 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:44,827 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 26 states. [2022-04-28 13:56:44,828 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 26 states. [2022-04-28 13:56:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:44,830 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-28 13:56:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-28 13:56:44,831 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:44,831 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:44,831 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 13:56:44,831 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 13:56:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-28 13:56:44,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-04-28 13:56:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 13:56:44,834 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-28 13:56:44,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:44,834 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 29 transitions. [2022-04-28 13:56:44,857 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 13:56:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-28 13:56:44,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-28 13:56:44,858 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:44,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:44,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 13:56:44,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:44,859 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-04-28 13:56:44,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:44,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682005955] [2022-04-28 13:56:44,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-04-28 13:56:44,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:44,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714984048] [2022-04-28 13:56:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:44,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:44,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 13:56:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926772344] [2022-04-28 13:56:44,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 13:56:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:44,881 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 13:56:44,881 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 13:56:44,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 13:56:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 13:56:44,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 13:56:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:44,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 13:56:45,106 INFO L272 TraceCheckUtils]: 0: Hoare triple {259#true} call ULTIMATE.init(); {259#true} is VALID [2022-04-28 13:56:45,107 INFO L290 TraceCheckUtils]: 1: Hoare triple {259#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,107 INFO L290 TraceCheckUtils]: 2: Hoare triple {267#(<= ~counter~0 0)} assume true; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,108 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {267#(<= ~counter~0 0)} {259#true} #67#return; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,108 INFO L272 TraceCheckUtils]: 4: Hoare triple {267#(<= ~counter~0 0)} call #t~ret7 := main(); {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,109 INFO L290 TraceCheckUtils]: 5: Hoare triple {267#(<= ~counter~0 0)} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,109 INFO L272 TraceCheckUtils]: 6: Hoare triple {267#(<= ~counter~0 0)} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,110 INFO L290 TraceCheckUtils]: 7: Hoare triple {267#(<= ~counter~0 0)} ~cond := #in~cond; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,110 INFO L290 TraceCheckUtils]: 8: Hoare triple {267#(<= ~counter~0 0)} assume !(0 == ~cond); {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,111 INFO L290 TraceCheckUtils]: 9: Hoare triple {267#(<= ~counter~0 0)} assume true; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,111 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {267#(<= ~counter~0 0)} {267#(<= ~counter~0 0)} #59#return; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,112 INFO L272 TraceCheckUtils]: 11: Hoare triple {267#(<= ~counter~0 0)} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,112 INFO L290 TraceCheckUtils]: 12: Hoare triple {267#(<= ~counter~0 0)} ~cond := #in~cond; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,113 INFO L290 TraceCheckUtils]: 13: Hoare triple {267#(<= ~counter~0 0)} assume !(0 == ~cond); {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,113 INFO L290 TraceCheckUtils]: 14: Hoare triple {267#(<= ~counter~0 0)} assume true; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,113 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {267#(<= ~counter~0 0)} {267#(<= ~counter~0 0)} #61#return; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,114 INFO L290 TraceCheckUtils]: 16: Hoare triple {267#(<= ~counter~0 0)} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {267#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:45,114 INFO L290 TraceCheckUtils]: 17: Hoare triple {267#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {316#(<= |main_#t~post6| 0)} is VALID [2022-04-28 13:56:45,115 INFO L290 TraceCheckUtils]: 18: Hoare triple {316#(<= |main_#t~post6| 0)} assume !(#t~post6 < 2);havoc #t~post6; {260#false} is VALID [2022-04-28 13:56:45,115 INFO L272 TraceCheckUtils]: 19: Hoare triple {260#false} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {260#false} is VALID [2022-04-28 13:56:45,115 INFO L290 TraceCheckUtils]: 20: Hoare triple {260#false} ~cond := #in~cond; {260#false} is VALID [2022-04-28 13:56:45,116 INFO L290 TraceCheckUtils]: 21: Hoare triple {260#false} assume 0 == ~cond; {260#false} is VALID [2022-04-28 13:56:45,116 INFO L290 TraceCheckUtils]: 22: Hoare triple {260#false} assume !false; {260#false} is VALID [2022-04-28 13:56:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:45,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 13:56:45,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 13:56:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714984048] [2022-04-28 13:56:45,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 13:56:45,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926772344] [2022-04-28 13:56:45,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926772344] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:45,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:45,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 13:56:45,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 13:56:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682005955] [2022-04-28 13:56:45,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682005955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:45,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:45,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 13:56:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45743875] [2022-04-28 13:56:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 13:56:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-28 13:56:45,122 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 13:56:45,122 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:45,137 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 13:56:45,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 13:56:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 13:56:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 13:56:45,140 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:45,208 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-28 13:56:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 13:56:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-28 13:56:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 13:56:45,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-28 13:56:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-28 13:56:45,218 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 38 transitions. [2022-04-28 13:56:45,246 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:45,248 INFO L225 Difference]: With dead ends: 34 [2022-04-28 13:56:45,248 INFO L226 Difference]: Without dead ends: 27 [2022-04-28 13:56:45,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 13:56:45,251 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 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 13:56:45,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 13:56:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-28 13:56:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-28 13:56:45,269 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 13:56:45,269 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:45,269 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:45,270 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:45,274 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-28 13:56:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-28 13:56:45,274 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:45,275 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:45,276 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 27 states. [2022-04-28 13:56:45,277 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 27 states. [2022-04-28 13:56:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:45,279 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-28 13:56:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-28 13:56:45,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:45,280 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:45,281 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 13:56:45,281 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 13:56:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-28 13:56:45,282 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-04-28 13:56:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 13:56:45,282 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-28 13:56:45,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 13:56:45,283 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 31 transitions. [2022-04-28 13:56:45,307 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 13:56:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-28 13:56:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-28 13:56:45,307 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:45,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:45,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-28 13:56:45,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:45,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-04-28 13:56:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:45,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670780835] [2022-04-28 13:56:45,514 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-04-28 13:56:45,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:45,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082884060] [2022-04-28 13:56:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:45,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 13:56:45,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548824257] [2022-04-28 13:56:45,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 13:56:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:45,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:45,529 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 13:56:45,531 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 13:56:45,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 13:56:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 13:56:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-28 13:56:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 13:56:47,961 INFO L272 TraceCheckUtils]: 0: Hoare triple {507#true} call ULTIMATE.init(); {507#true} is VALID [2022-04-28 13:56:47,961 INFO L290 TraceCheckUtils]: 1: Hoare triple {507#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {507#true} is VALID [2022-04-28 13:56:47,961 INFO L290 TraceCheckUtils]: 2: Hoare triple {507#true} assume true; {507#true} is VALID [2022-04-28 13:56:47,962 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {507#true} {507#true} #67#return; {507#true} is VALID [2022-04-28 13:56:47,962 INFO L272 TraceCheckUtils]: 4: Hoare triple {507#true} call #t~ret7 := main(); {507#true} is VALID [2022-04-28 13:56:47,962 INFO L290 TraceCheckUtils]: 5: Hoare triple {507#true} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {507#true} is VALID [2022-04-28 13:56:47,962 INFO L272 TraceCheckUtils]: 6: Hoare triple {507#true} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {507#true} is VALID [2022-04-28 13:56:47,962 INFO L290 TraceCheckUtils]: 7: Hoare triple {507#true} ~cond := #in~cond; {507#true} is VALID [2022-04-28 13:56:47,963 INFO L290 TraceCheckUtils]: 8: Hoare triple {507#true} assume !(0 == ~cond); {507#true} is VALID [2022-04-28 13:56:47,963 INFO L290 TraceCheckUtils]: 9: Hoare triple {507#true} assume true; {507#true} is VALID [2022-04-28 13:56:47,963 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {507#true} {507#true} #59#return; {507#true} is VALID [2022-04-28 13:56:47,963 INFO L272 TraceCheckUtils]: 11: Hoare triple {507#true} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {507#true} is VALID [2022-04-28 13:56:47,963 INFO L290 TraceCheckUtils]: 12: Hoare triple {507#true} ~cond := #in~cond; {507#true} is VALID [2022-04-28 13:56:47,963 INFO L290 TraceCheckUtils]: 13: Hoare triple {507#true} assume !(0 == ~cond); {507#true} is VALID [2022-04-28 13:56:47,964 INFO L290 TraceCheckUtils]: 14: Hoare triple {507#true} assume true; {507#true} is VALID [2022-04-28 13:56:47,964 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {507#true} {507#true} #61#return; {507#true} is VALID [2022-04-28 13:56:47,964 INFO L290 TraceCheckUtils]: 16: Hoare triple {507#true} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} is VALID [2022-04-28 13:56:47,965 INFO L290 TraceCheckUtils]: 17: Hoare triple {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} is VALID [2022-04-28 13:56:47,965 INFO L290 TraceCheckUtils]: 18: Hoare triple {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} assume !!(#t~post6 < 2);havoc #t~post6; {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} is VALID [2022-04-28 13:56:47,966 INFO L272 TraceCheckUtils]: 19: Hoare triple {560#(and (= main_~y2~0 0) (= main_~y1~0 0) (= main_~x1~0 main_~y3~0))} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 + ~y3~0 == ~x1~0 then 1 else 0)); {570#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 13:56:47,967 INFO L290 TraceCheckUtils]: 20: Hoare triple {570#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {574#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 13:56:47,967 INFO L290 TraceCheckUtils]: 21: Hoare triple {574#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {508#false} is VALID [2022-04-28 13:56:47,967 INFO L290 TraceCheckUtils]: 22: Hoare triple {508#false} assume !false; {508#false} is VALID [2022-04-28 13:56:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:47,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 13:56:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 13:56:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082884060] [2022-04-28 13:56:47,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 13:56:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548824257] [2022-04-28 13:56:47,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548824257] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:47,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:47,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 13:56:47,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 13:56:47,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670780835] [2022-04-28 13:56:47,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670780835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:47,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:47,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 13:56:47,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473978749] [2022-04-28 13:56:47,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 13:56:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-28 13:56:47,970 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 13:56:47,970 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-28 13:56:47,987 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 13:56:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 13:56:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:47,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 13:56:47,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 13:56:47,988 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-28 13:56:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:48,119 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-04-28 13:56:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 13:56:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-28 13:56:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 13:56:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-28 13:56:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-28 13:56:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-28 13:56:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-28 13:56:48,122 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 43 transitions. [2022-04-28 13:56:48,153 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:48,157 INFO L225 Difference]: With dead ends: 37 [2022-04-28 13:56:48,157 INFO L226 Difference]: Without dead ends: 35 [2022-04-28 13:56:48,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 13:56:48,164 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 13:56:48,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 13:56:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-28 13:56:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-04-28 13:56:48,188 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 13:56:48,188 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:48,188 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:48,189 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:48,190 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-28 13:56:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-28 13:56:48,191 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:48,191 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:48,204 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 35 states. [2022-04-28 13:56:48,204 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 35 states. [2022-04-28 13:56:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:48,209 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-28 13:56:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-28 13:56:48,209 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:48,210 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:48,210 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 13:56:48,210 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 13:56:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:48,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-28 13:56:48,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-04-28 13:56:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 13:56:48,220 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-28 13:56:48,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-28 13:56:48,221 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 36 transitions. [2022-04-28 13:56:48,255 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 13:56:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-28 13:56:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-28 13:56:48,257 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:48,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:48,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-28 13:56:48,471 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,SelfDestructingSolverStorable2 [2022-04-28 13:56:48,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-04-28 13:56:48,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1697323757] [2022-04-28 13:56:48,473 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-04-28 13:56:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:48,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124128518] [2022-04-28 13:56:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:48,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 13:56:48,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146062248] [2022-04-28 13:56:48,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 13:56:48,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:48,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:48,496 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 13:56:48,497 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 13:56:48,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 13:56:48,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 13:56:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-28 13:56:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 13:56:48,677 INFO L272 TraceCheckUtils]: 0: Hoare triple {790#true} call ULTIMATE.init(); {790#true} is VALID [2022-04-28 13:56:48,678 INFO L290 TraceCheckUtils]: 1: Hoare triple {790#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {790#true} is VALID [2022-04-28 13:56:48,678 INFO L290 TraceCheckUtils]: 2: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:48,678 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {790#true} {790#true} #67#return; {790#true} is VALID [2022-04-28 13:56:48,678 INFO L272 TraceCheckUtils]: 4: Hoare triple {790#true} call #t~ret7 := main(); {790#true} is VALID [2022-04-28 13:56:48,678 INFO L290 TraceCheckUtils]: 5: Hoare triple {790#true} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {790#true} is VALID [2022-04-28 13:56:48,679 INFO L272 TraceCheckUtils]: 6: Hoare triple {790#true} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:48,679 INFO L290 TraceCheckUtils]: 7: Hoare triple {790#true} ~cond := #in~cond; {790#true} is VALID [2022-04-28 13:56:48,679 INFO L290 TraceCheckUtils]: 8: Hoare triple {790#true} assume !(0 == ~cond); {790#true} is VALID [2022-04-28 13:56:48,679 INFO L290 TraceCheckUtils]: 9: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:48,680 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {790#true} {790#true} #59#return; {790#true} is VALID [2022-04-28 13:56:48,680 INFO L272 TraceCheckUtils]: 11: Hoare triple {790#true} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:48,680 INFO L290 TraceCheckUtils]: 12: Hoare triple {790#true} ~cond := #in~cond; {790#true} is VALID [2022-04-28 13:56:48,680 INFO L290 TraceCheckUtils]: 13: Hoare triple {790#true} assume !(0 == ~cond); {790#true} is VALID [2022-04-28 13:56:48,680 INFO L290 TraceCheckUtils]: 14: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:48,681 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {790#true} {790#true} #61#return; {790#true} is VALID [2022-04-28 13:56:48,681 INFO L290 TraceCheckUtils]: 16: Hoare triple {790#true} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {790#true} is VALID [2022-04-28 13:56:48,681 INFO L290 TraceCheckUtils]: 17: Hoare triple {790#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {790#true} is VALID [2022-04-28 13:56:48,681 INFO L290 TraceCheckUtils]: 18: Hoare triple {790#true} assume !!(#t~post6 < 2);havoc #t~post6; {790#true} is VALID [2022-04-28 13:56:48,681 INFO L272 TraceCheckUtils]: 19: Hoare triple {790#true} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 + ~y3~0 == ~x1~0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:48,682 INFO L290 TraceCheckUtils]: 20: Hoare triple {790#true} ~cond := #in~cond; {855#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 13:56:48,683 INFO L290 TraceCheckUtils]: 21: Hoare triple {855#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {859#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 13:56:48,683 INFO L290 TraceCheckUtils]: 22: Hoare triple {859#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {859#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 13:56:48,684 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {859#(not (= |__VERIFIER_assert_#in~cond| 0))} {790#true} #63#return; {866#(= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0)} is VALID [2022-04-28 13:56:48,684 INFO L290 TraceCheckUtils]: 24: Hoare triple {866#(= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0)} assume !(0 != ~y3~0); {870#(= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0)} is VALID [2022-04-28 13:56:48,685 INFO L272 TraceCheckUtils]: 25: Hoare triple {870#(= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0)} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {874#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 13:56:48,686 INFO L290 TraceCheckUtils]: 26: Hoare triple {874#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {878#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 13:56:48,686 INFO L290 TraceCheckUtils]: 27: Hoare triple {878#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {791#false} is VALID [2022-04-28 13:56:48,687 INFO L290 TraceCheckUtils]: 28: Hoare triple {791#false} assume !false; {791#false} is VALID [2022-04-28 13:56:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 13:56:54,994 INFO L290 TraceCheckUtils]: 28: Hoare triple {791#false} assume !false; {791#false} is VALID [2022-04-28 13:56:54,995 INFO L290 TraceCheckUtils]: 27: Hoare triple {878#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {791#false} is VALID [2022-04-28 13:56:54,995 INFO L290 TraceCheckUtils]: 26: Hoare triple {874#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {878#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 13:56:54,996 INFO L272 TraceCheckUtils]: 25: Hoare triple {870#(= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0)} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {874#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 13:56:54,997 INFO L290 TraceCheckUtils]: 24: Hoare triple {897#(or (not (= main_~y3~0 0)) (= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0))} assume !(0 != ~y3~0); {870#(= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0)} is VALID [2022-04-28 13:56:54,998 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {859#(not (= |__VERIFIER_assert_#in~cond| 0))} {790#true} #63#return; {897#(or (not (= main_~y3~0 0)) (= (+ (* main_~x2~0 main_~y1~0) main_~y2~0) main_~x1~0))} is VALID [2022-04-28 13:56:54,998 INFO L290 TraceCheckUtils]: 22: Hoare triple {859#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {859#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 13:56:54,999 INFO L290 TraceCheckUtils]: 21: Hoare triple {910#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {859#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 13:56:54,999 INFO L290 TraceCheckUtils]: 20: Hoare triple {790#true} ~cond := #in~cond; {910#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 13:56:55,000 INFO L272 TraceCheckUtils]: 19: Hoare triple {790#true} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 + ~y3~0 == ~x1~0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:55,000 INFO L290 TraceCheckUtils]: 18: Hoare triple {790#true} assume !!(#t~post6 < 2);havoc #t~post6; {790#true} is VALID [2022-04-28 13:56:55,000 INFO L290 TraceCheckUtils]: 17: Hoare triple {790#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {790#true} is VALID [2022-04-28 13:56:55,000 INFO L290 TraceCheckUtils]: 16: Hoare triple {790#true} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {790#true} is VALID [2022-04-28 13:56:55,000 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {790#true} {790#true} #61#return; {790#true} is VALID [2022-04-28 13:56:55,000 INFO L290 TraceCheckUtils]: 14: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:55,001 INFO L290 TraceCheckUtils]: 13: Hoare triple {790#true} assume !(0 == ~cond); {790#true} is VALID [2022-04-28 13:56:55,001 INFO L290 TraceCheckUtils]: 12: Hoare triple {790#true} ~cond := #in~cond; {790#true} is VALID [2022-04-28 13:56:55,001 INFO L272 TraceCheckUtils]: 11: Hoare triple {790#true} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:55,001 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {790#true} {790#true} #59#return; {790#true} is VALID [2022-04-28 13:56:55,001 INFO L290 TraceCheckUtils]: 9: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:55,002 INFO L290 TraceCheckUtils]: 8: Hoare triple {790#true} assume !(0 == ~cond); {790#true} is VALID [2022-04-28 13:56:55,002 INFO L290 TraceCheckUtils]: 7: Hoare triple {790#true} ~cond := #in~cond; {790#true} is VALID [2022-04-28 13:56:55,002 INFO L272 TraceCheckUtils]: 6: Hoare triple {790#true} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {790#true} is VALID [2022-04-28 13:56:55,002 INFO L290 TraceCheckUtils]: 5: Hoare triple {790#true} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {790#true} is VALID [2022-04-28 13:56:55,002 INFO L272 TraceCheckUtils]: 4: Hoare triple {790#true} call #t~ret7 := main(); {790#true} is VALID [2022-04-28 13:56:55,002 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {790#true} {790#true} #67#return; {790#true} is VALID [2022-04-28 13:56:55,003 INFO L290 TraceCheckUtils]: 2: Hoare triple {790#true} assume true; {790#true} is VALID [2022-04-28 13:56:55,003 INFO L290 TraceCheckUtils]: 1: Hoare triple {790#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {790#true} is VALID [2022-04-28 13:56:55,003 INFO L272 TraceCheckUtils]: 0: Hoare triple {790#true} call ULTIMATE.init(); {790#true} is VALID [2022-04-28 13:56:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:55,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 13:56:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124128518] [2022-04-28 13:56:55,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 13:56:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146062248] [2022-04-28 13:56:55,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146062248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 13:56:55,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 13:56:55,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-28 13:56:55,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 13:56:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1697323757] [2022-04-28 13:56:55,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1697323757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:55,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:55,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-28 13:56:55,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122405621] [2022-04-28 13:56:55,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 13:56:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-28 13:56:55,006 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 13:56:55,006 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-28 13:56:55,035 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-28 13:56:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-28 13:56:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-28 13:56:55,037 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-28 13:56:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:55,219 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-04-28 13:56:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-28 13:56:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-28 13:56:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 13:56:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-28 13:56:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-28 13:56:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-28 13:56:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-28 13:56:55,221 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 35 transitions. [2022-04-28 13:56:55,246 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 13:56:55,247 INFO L225 Difference]: With dead ends: 39 [2022-04-28 13:56:55,247 INFO L226 Difference]: Without dead ends: 34 [2022-04-28 13:56:55,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-28 13:56:55,248 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 13:56:55,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 13:56:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-28 13:56:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-04-28 13:56:55,271 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 13:56:55,271 INFO L82 GeneralOperation]: Start isEquivalent. First operand 34 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:55,271 INFO L74 IsIncluded]: Start isIncluded. First operand 34 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:55,271 INFO L87 Difference]: Start difference. First operand 34 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:55,273 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-28 13:56:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-28 13:56:55,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:55,273 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:55,273 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 34 states. [2022-04-28 13:56:55,273 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 34 states. [2022-04-28 13:56:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:55,276 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-28 13:56:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-28 13:56:55,277 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:55,277 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:55,277 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 13:56:55,277 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 13:56:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 13:56:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-28 13:56:55,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-04-28 13:56:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 13:56:55,278 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-28 13:56:55,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-28 13:56:55,278 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 31 transitions. [2022-04-28 13:56:55,306 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 13:56:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-28 13:56:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-28 13:56:55,307 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:55,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:55,325 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 13:56:55,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:55,515 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-04-28 13:56:55,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102207488] [2022-04-28 13:56:55,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-04-28 13:56:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:55,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898129862] [2022-04-28 13:56:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:55,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 13:56:55,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617337985] [2022-04-28 13:56:55,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 13:56:55,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:55,531 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 13:56:55,532 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 13:56:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 13:56:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 13:56:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 13:56:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 13:56:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 13:56:55,693 INFO L272 TraceCheckUtils]: 0: Hoare triple {1183#true} call ULTIMATE.init(); {1183#true} is VALID [2022-04-28 13:56:55,693 INFO L290 TraceCheckUtils]: 1: Hoare triple {1183#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,695 INFO L290 TraceCheckUtils]: 2: Hoare triple {1191#(<= ~counter~0 0)} assume true; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,696 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1191#(<= ~counter~0 0)} {1183#true} #67#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,696 INFO L272 TraceCheckUtils]: 4: Hoare triple {1191#(<= ~counter~0 0)} call #t~ret7 := main(); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,698 INFO L290 TraceCheckUtils]: 5: Hoare triple {1191#(<= ~counter~0 0)} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,699 INFO L272 TraceCheckUtils]: 6: Hoare triple {1191#(<= ~counter~0 0)} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,699 INFO L290 TraceCheckUtils]: 7: Hoare triple {1191#(<= ~counter~0 0)} ~cond := #in~cond; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,699 INFO L290 TraceCheckUtils]: 8: Hoare triple {1191#(<= ~counter~0 0)} assume !(0 == ~cond); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,700 INFO L290 TraceCheckUtils]: 9: Hoare triple {1191#(<= ~counter~0 0)} assume true; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,700 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1191#(<= ~counter~0 0)} {1191#(<= ~counter~0 0)} #59#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,700 INFO L272 TraceCheckUtils]: 11: Hoare triple {1191#(<= ~counter~0 0)} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,701 INFO L290 TraceCheckUtils]: 12: Hoare triple {1191#(<= ~counter~0 0)} ~cond := #in~cond; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,701 INFO L290 TraceCheckUtils]: 13: Hoare triple {1191#(<= ~counter~0 0)} assume !(0 == ~cond); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,701 INFO L290 TraceCheckUtils]: 14: Hoare triple {1191#(<= ~counter~0 0)} assume true; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,704 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1191#(<= ~counter~0 0)} {1191#(<= ~counter~0 0)} #61#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,704 INFO L290 TraceCheckUtils]: 16: Hoare triple {1191#(<= ~counter~0 0)} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,704 INFO L290 TraceCheckUtils]: 17: Hoare triple {1191#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,705 INFO L290 TraceCheckUtils]: 18: Hoare triple {1240#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,705 INFO L272 TraceCheckUtils]: 19: Hoare triple {1240#(<= ~counter~0 1)} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 + ~y3~0 == ~x1~0 then 1 else 0)); {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,706 INFO L290 TraceCheckUtils]: 20: Hoare triple {1240#(<= ~counter~0 1)} ~cond := #in~cond; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,706 INFO L290 TraceCheckUtils]: 21: Hoare triple {1240#(<= ~counter~0 1)} assume !(0 == ~cond); {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,706 INFO L290 TraceCheckUtils]: 22: Hoare triple {1240#(<= ~counter~0 1)} assume true; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,707 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {1240#(<= ~counter~0 1)} {1240#(<= ~counter~0 1)} #63#return; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,707 INFO L290 TraceCheckUtils]: 24: Hoare triple {1240#(<= ~counter~0 1)} assume !!(0 != ~y3~0); {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,707 INFO L290 TraceCheckUtils]: 25: Hoare triple {1240#(<= ~counter~0 1)} assume 1 + ~y2~0 == ~x2~0;~y1~0 := 1 + ~y1~0;~y2~0 := 0;~y3~0 := ~y3~0 - 1; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,708 INFO L290 TraceCheckUtils]: 26: Hoare triple {1240#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1268#(<= |main_#t~post6| 1)} is VALID [2022-04-28 13:56:55,708 INFO L290 TraceCheckUtils]: 27: Hoare triple {1268#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {1184#false} is VALID [2022-04-28 13:56:55,708 INFO L272 TraceCheckUtils]: 28: Hoare triple {1184#false} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {1184#false} is VALID [2022-04-28 13:56:55,709 INFO L290 TraceCheckUtils]: 29: Hoare triple {1184#false} ~cond := #in~cond; {1184#false} is VALID [2022-04-28 13:56:55,709 INFO L290 TraceCheckUtils]: 30: Hoare triple {1184#false} assume 0 == ~cond; {1184#false} is VALID [2022-04-28 13:56:55,709 INFO L290 TraceCheckUtils]: 31: Hoare triple {1184#false} assume !false; {1184#false} is VALID [2022-04-28 13:56:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:55,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 13:56:55,829 INFO L290 TraceCheckUtils]: 31: Hoare triple {1184#false} assume !false; {1184#false} is VALID [2022-04-28 13:56:55,843 INFO L290 TraceCheckUtils]: 30: Hoare triple {1184#false} assume 0 == ~cond; {1184#false} is VALID [2022-04-28 13:56:55,843 INFO L290 TraceCheckUtils]: 29: Hoare triple {1184#false} ~cond := #in~cond; {1184#false} is VALID [2022-04-28 13:56:55,843 INFO L272 TraceCheckUtils]: 28: Hoare triple {1184#false} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 == ~x1~0 then 1 else 0)); {1184#false} is VALID [2022-04-28 13:56:55,844 INFO L290 TraceCheckUtils]: 27: Hoare triple {1268#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {1184#false} is VALID [2022-04-28 13:56:55,844 INFO L290 TraceCheckUtils]: 26: Hoare triple {1240#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1268#(<= |main_#t~post6| 1)} is VALID [2022-04-28 13:56:55,845 INFO L290 TraceCheckUtils]: 25: Hoare triple {1240#(<= ~counter~0 1)} assume 1 + ~y2~0 == ~x2~0;~y1~0 := 1 + ~y1~0;~y2~0 := 0;~y3~0 := ~y3~0 - 1; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,845 INFO L290 TraceCheckUtils]: 24: Hoare triple {1240#(<= ~counter~0 1)} assume !!(0 != ~y3~0); {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,846 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {1183#true} {1240#(<= ~counter~0 1)} #63#return; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,846 INFO L290 TraceCheckUtils]: 22: Hoare triple {1183#true} assume true; {1183#true} is VALID [2022-04-28 13:56:55,846 INFO L290 TraceCheckUtils]: 21: Hoare triple {1183#true} assume !(0 == ~cond); {1183#true} is VALID [2022-04-28 13:56:55,846 INFO L290 TraceCheckUtils]: 20: Hoare triple {1183#true} ~cond := #in~cond; {1183#true} is VALID [2022-04-28 13:56:55,846 INFO L272 TraceCheckUtils]: 19: Hoare triple {1240#(<= ~counter~0 1)} call __VERIFIER_assert((if ~y1~0 * ~x2~0 + ~y2~0 + ~y3~0 == ~x1~0 then 1 else 0)); {1183#true} is VALID [2022-04-28 13:56:55,847 INFO L290 TraceCheckUtils]: 18: Hoare triple {1240#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,847 INFO L290 TraceCheckUtils]: 17: Hoare triple {1191#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1240#(<= ~counter~0 1)} is VALID [2022-04-28 13:56:55,847 INFO L290 TraceCheckUtils]: 16: Hoare triple {1191#(<= ~counter~0 0)} ~y1~0 := 0;~y2~0 := 0;~y3~0 := ~x1~0; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,848 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1183#true} {1191#(<= ~counter~0 0)} #61#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,848 INFO L290 TraceCheckUtils]: 14: Hoare triple {1183#true} assume true; {1183#true} is VALID [2022-04-28 13:56:55,848 INFO L290 TraceCheckUtils]: 13: Hoare triple {1183#true} assume !(0 == ~cond); {1183#true} is VALID [2022-04-28 13:56:55,848 INFO L290 TraceCheckUtils]: 12: Hoare triple {1183#true} ~cond := #in~cond; {1183#true} is VALID [2022-04-28 13:56:55,848 INFO L272 TraceCheckUtils]: 11: Hoare triple {1191#(<= ~counter~0 0)} call assume_abort_if_not((if 0 != ~x2~0 then 1 else 0)); {1183#true} is VALID [2022-04-28 13:56:55,849 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1183#true} {1191#(<= ~counter~0 0)} #59#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,849 INFO L290 TraceCheckUtils]: 9: Hoare triple {1183#true} assume true; {1183#true} is VALID [2022-04-28 13:56:55,849 INFO L290 TraceCheckUtils]: 8: Hoare triple {1183#true} assume !(0 == ~cond); {1183#true} is VALID [2022-04-28 13:56:55,849 INFO L290 TraceCheckUtils]: 7: Hoare triple {1183#true} ~cond := #in~cond; {1183#true} is VALID [2022-04-28 13:56:55,849 INFO L272 TraceCheckUtils]: 6: Hoare triple {1191#(<= ~counter~0 0)} call assume_abort_if_not((if ~x1~0 >= 0 then 1 else 0)); {1183#true} is VALID [2022-04-28 13:56:55,850 INFO L290 TraceCheckUtils]: 5: Hoare triple {1191#(<= ~counter~0 0)} havoc ~x1~0;havoc ~x2~0;havoc ~y1~0;havoc ~y2~0;havoc ~y3~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x1~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~x2~0 := #t~nondet5;havoc #t~nondet5; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,850 INFO L272 TraceCheckUtils]: 4: Hoare triple {1191#(<= ~counter~0 0)} call #t~ret7 := main(); {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,850 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1191#(<= ~counter~0 0)} {1183#true} #67#return; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,851 INFO L290 TraceCheckUtils]: 2: Hoare triple {1191#(<= ~counter~0 0)} assume true; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,851 INFO L290 TraceCheckUtils]: 1: Hoare triple {1183#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(11, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1191#(<= ~counter~0 0)} is VALID [2022-04-28 13:56:55,851 INFO L272 TraceCheckUtils]: 0: Hoare triple {1183#true} call ULTIMATE.init(); {1183#true} is VALID [2022-04-28 13:56:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 13:56:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 13:56:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898129862] [2022-04-28 13:56:55,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 13:56:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617337985] [2022-04-28 13:56:55,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617337985] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 13:56:55,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 13:56:55,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-28 13:56:55,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 13:56:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102207488] [2022-04-28 13:56:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102207488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 13:56:55,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 13:56:55,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 13:56:55,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489338130] [2022-04-28 13:56:55,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 13:56:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-04-28 13:56:55,853 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 13:56:55,854 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 13:56:55,883 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 13:56:55,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 13:56:55,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 13:56:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-28 13:56:55,884 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 13:56:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:55,974 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-04-28 13:56:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 13:56:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-04-28 13:56:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 13:56:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 13:56:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 45 transitions. [2022-04-28 13:56:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 13:56:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 45 transitions. [2022-04-28 13:56:55,977 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 45 transitions. [2022-04-28 13:56:56,006 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 45 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:56,006 INFO L225 Difference]: With dead ends: 43 [2022-04-28 13:56:56,007 INFO L226 Difference]: Without dead ends: 38 [2022-04-28 13:56:56,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-28 13:56:56,007 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 13:56:56,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 13:56:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-28 13:56:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-28 13:56:56,029 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 13:56:56,029 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:56,029 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:56,029 INFO L87 Difference]: Start difference. First operand 38 states. Second operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:56,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:56,030 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-28 13:56:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-28 13:56:56,031 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:56,031 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:56,031 INFO L74 IsIncluded]: Start isIncluded. First operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 38 states. [2022-04-28 13:56:56,031 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 38 states. [2022-04-28 13:56:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 13:56:56,032 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-28 13:56:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-28 13:56:56,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 13:56:56,033 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 13:56:56,033 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 13:56:56,033 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 13:56:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 13:56:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-04-28 13:56:56,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-04-28 13:56:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 13:56:56,034 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-04-28 13:56:56,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-28 13:56:56,035 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 38 states and 41 transitions. [2022-04-28 13:56:56,069 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 13:56:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-28 13:56:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-28 13:56:56,070 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 13:56:56,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 13:56:56,086 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 13:56:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:56,283 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 13:56:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 13:56:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-04-28 13:56:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 13:56:56,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903430684] [2022-04-28 13:56:56,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 13:56:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-04-28 13:56:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 13:56:56,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843822774] [2022-04-28 13:56:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 13:56:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 13:56:56,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 13:56:56,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458498632] [2022-04-28 13:56:56,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-28 13:56:56,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 13:56:56,296 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 13:56:56,297 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 13:56:56,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-28 13:56:56,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-28 13:56:56,333 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-28 13:56:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-28 13:56:56,365 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-28 13:56:56,365 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-28 13:56:56,365 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-04-28 13:56:56,367 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 13:56:56,402 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 13:56:56,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 13:56:56,590 INFO L356 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2] [2022-04-28 13:56:56,592 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2022-04-28 13:56:56,599 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L13-2 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L29-1 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L29-1 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: L16-2 has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: assume_abort_if_notEXIT has no Hoare annotation [2022-04-28 13:56:56,600 WARN L170 areAnnotationChecker]: assume_abort_if_notEXIT has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L41-2 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L41-2 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L37-1 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L37-1 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L50 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L36-3 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L36-3 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L36-1 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L36-1 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L41 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L41 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2022-04-28 13:56:56,601 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-28 13:56:56,601 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-28 13:56:56,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 01:56:56 BoogieIcfgContainer [2022-04-28 13:56:56,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 13:56:56,603 INFO L158 Benchmark]: Toolchain (without parser) took 12996.28ms. Allocated memory was 218.1MB in the beginning and 297.8MB in the end (delta: 79.7MB). Free memory was 169.6MB in the beginning and 107.3MB in the end (delta: 62.3MB). Peak memory consumption was 141.8MB. Max. memory is 8.0GB. [2022-04-28 13:56:56,603 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 218.1MB. Free memory was 185.7MB in the beginning and 185.6MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 13:56:56,603 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.39ms. Allocated memory is still 218.1MB. Free memory was 169.4MB in the beginning and 195.1MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-28 13:56:56,603 INFO L158 Benchmark]: Boogie Preprocessor took 34.03ms. Allocated memory is still 218.1MB. Free memory was 195.1MB in the beginning and 193.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-28 13:56:56,603 INFO L158 Benchmark]: RCFGBuilder took 263.29ms. Allocated memory is still 218.1MB. Free memory was 193.5MB in the beginning and 182.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-28 13:56:56,604 INFO L158 Benchmark]: TraceAbstraction took 12487.09ms. Allocated memory was 218.1MB in the beginning and 297.8MB in the end (delta: 79.7MB). Free memory was 181.5MB in the beginning and 107.3MB in the end (delta: 74.2MB). Peak memory consumption was 153.9MB. Max. memory is 8.0GB. [2022-04-28 13:56:56,604 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 0.15ms. Allocated memory is still 218.1MB. Free memory was 185.7MB in the beginning and 185.6MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.39ms. Allocated memory is still 218.1MB. Free memory was 169.4MB in the beginning and 195.1MB in the end (delta: -25.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.03ms. Allocated memory is still 218.1MB. Free memory was 195.1MB in the beginning and 193.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 263.29ms. Allocated memory is still 218.1MB. Free memory was 193.5MB in the beginning and 182.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 12487.09ms. Allocated memory was 218.1MB in the beginning and 297.8MB in the end (delta: 79.7MB). Free memory was 181.5MB in the beginning and 107.3MB in the end (delta: 74.2MB). Peak memory consumption was 153.9MB. 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 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<2 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<2) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.4s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 237 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 123 IncrementalHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 129 mSDtfsCounter, 123 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-28 13:56:56,619 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...