/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:49:29,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:49:29,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:49:29,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:49:29,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:49:29,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:49:29,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:49:29,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:49:29,975 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:49:29,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:49:29,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:49:29,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:49:29,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:49:29,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:49:29,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:49:29,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:49:29,977 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:49:29,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:49:29,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:49:29,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:49:29,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:49:29,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:49:29,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:49:29,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:49:29,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:49:29,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:49:30,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:49:30,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:49:30,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:49:30,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:49:30,193 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:49:30,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-01-09 22:49:30,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f3c757d/b14a2cd8cbeb4984983ff91cfd706e29/FLAG6b17498e3 [2022-01-09 22:49:30,622 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:49:30,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-01-09 22:49:30,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f3c757d/b14a2cd8cbeb4984983ff91cfd706e29/FLAG6b17498e3 [2022-01-09 22:49:30,643 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f3c757d/b14a2cd8cbeb4984983ff91cfd706e29 [2022-01-09 22:49:30,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:49:30,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:49:30,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:49:30,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:49:30,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:49:30,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39300f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30, skipping insertion in model container [2022-01-09 22:49:30,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:49:30,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:49:30,808 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-01-09 22:49:30,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:49:30,827 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:49:30,836 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-01-09 22:49:30,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:49:30,854 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:49:30,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30 WrapperNode [2022-01-09 22:49:30,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:49:30,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:49:30,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:49:30,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:49:30,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,880 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-01-09 22:49:30,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:49:30,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:49:30,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:49:30,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:49:30,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:49:30,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:49:30,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:49:30,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:49:30,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (1/1) ... [2022-01-09 22:49:30,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:49:30,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:30,937 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) [2022-01-09 22:49:30,963 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 [2022-01-09 22:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-09 22:49:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-09 22:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:49:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:49:30,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:49:30,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:49:31,001 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:49:31,002 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:49:31,096 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:49:31,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:49:31,105 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:49:31,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:49:31 BoogieIcfgContainer [2022-01-09 22:49:31,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:49:31,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:49:31,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:49:31,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:49:31,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:49:30" (1/3) ... [2022-01-09 22:49:31,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e3eeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:49:31, skipping insertion in model container [2022-01-09 22:49:31,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:49:30" (2/3) ... [2022-01-09 22:49:31,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34e3eeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:49:31, skipping insertion in model container [2022-01-09 22:49:31,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:49:31" (3/3) ... [2022-01-09 22:49:31,111 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2022-01-09 22:49:31,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:49:31,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:49:31,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:49:31,173 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:49:31,174 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:49:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:49:31,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 22:49:31,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:31,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:31,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:31,191 INFO L85 PathProgramCache]: Analyzing trace with hash -861605892, now seen corresponding path program 1 times [2022-01-09 22:49:31,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:31,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194497948] [2022-01-09 22:49:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:31,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-09 22:49:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-09 22:49:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-09 22:49:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:49:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:31,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194497948] [2022-01-09 22:49:31,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194497948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:49:31,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:49:31,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:49:31,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835233850] [2022-01-09 22:49:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:49:31,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:49:31,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:49:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:49:31,335 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 22:49:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:31,347 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-01-09 22:49:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:49:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-09 22:49:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:31,352 INFO L225 Difference]: With dead ends: 51 [2022-01-09 22:49:31,352 INFO L226 Difference]: Without dead ends: 23 [2022-01-09 22:49:31,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:49:31,356 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:31,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:49:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-09 22:49:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-09 22:49:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:49:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-09 22:49:31,378 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 24 [2022-01-09 22:49:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-09 22:49:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 22:49:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-09 22:49:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 22:49:31,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:31,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:31,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:49:31,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2010313222, now seen corresponding path program 1 times [2022-01-09 22:49:31,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:31,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695985652] [2022-01-09 22:49:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:31,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:31,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:31,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144257525] [2022-01-09 22:49:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:31,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:31,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:31,404 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) [2022-01-09 22:49:31,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:49:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:49:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:49:31,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:49:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:31,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695985652] [2022-01-09 22:49:31,596 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:31,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144257525] [2022-01-09 22:49:31,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144257525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:49:31,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:49:31,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:49:31,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531323921] [2022-01-09 22:49:31,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:49:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:49:31,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:49:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:49:31,605 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:49:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:31,658 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-09 22:49:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:49:31,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-09 22:49:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:31,660 INFO L225 Difference]: With dead ends: 35 [2022-01-09 22:49:31,660 INFO L226 Difference]: Without dead ends: 33 [2022-01-09 22:49:31,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:49:31,662 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:31,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:49:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-09 22:49:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-09 22:49:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:49:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-09 22:49:31,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2022-01-09 22:49:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:31,683 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-09 22:49:31,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:49:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-09 22:49:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 22:49:31,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:31,686 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:31,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:49:31,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:31,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash -895979555, now seen corresponding path program 1 times [2022-01-09 22:49:31,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:31,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079812016] [2022-01-09 22:49:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:31,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:31,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:31,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28333402] [2022-01-09 22:49:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:31,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:31,916 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) [2022-01-09 22:49:31,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:49:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:49:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:49:32,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:49:32,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079812016] [2022-01-09 22:49:32,028 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:32,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28333402] [2022-01-09 22:49:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28333402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:49:32,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:49:32,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-09 22:49:32,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067615560] [2022-01-09 22:49:32,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:49:32,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 22:49:32,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 22:49:32,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:49:32,030 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-09 22:49:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:32,085 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-09 22:49:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:49:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-09 22:49:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:32,086 INFO L225 Difference]: With dead ends: 39 [2022-01-09 22:49:32,087 INFO L226 Difference]: Without dead ends: 32 [2022-01-09 22:49:32,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:49:32,089 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:32,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:49:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-09 22:49:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-01-09 22:49:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:49:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-09 22:49:32,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 30 [2022-01-09 22:49:32,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:32,097 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-09 22:49:32,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-09 22:49:32,097 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-09 22:49:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 22:49:32,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:32,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:32,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:49:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-09 22:49:32,311 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1371702355, now seen corresponding path program 1 times [2022-01-09 22:49:32,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:32,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426227399] [2022-01-09 22:49:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:32,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:32,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:32,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716315364] [2022-01-09 22:49:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:32,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:32,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:32,328 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) [2022-01-09 22:49:32,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:49:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 22:49:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:49:34,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:49:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:49:44,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426227399] [2022-01-09 22:49:44,497 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:44,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716315364] [2022-01-09 22:49:44,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716315364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:49:44,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:49:44,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-01-09 22:49:44,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527107252] [2022-01-09 22:49:44,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:49:44,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:49:44,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:49:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-01-09 22:49:44,500 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 22:49:49,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:49:51,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:49:53,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:49:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:53,304 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-01-09 22:49:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:49:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-01-09 22:49:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:53,306 INFO L225 Difference]: With dead ends: 48 [2022-01-09 22:49:53,306 INFO L226 Difference]: Without dead ends: 46 [2022-01-09 22:49:53,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=70, Invalid=270, Unknown=2, NotChecked=0, Total=342 [2022-01-09 22:49:53,307 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:53,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 172 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-01-09 22:49:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-09 22:49:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-09 22:49:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:49:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-01-09 22:49:53,311 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 33 [2022-01-09 22:49:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:53,312 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-01-09 22:49:53,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 22:49:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-01-09 22:49:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 22:49:53,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:53,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:53,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:49:53,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:53,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 403305007, now seen corresponding path program 1 times [2022-01-09 22:49:53,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:53,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496134325] [2022-01-09 22:49:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:53,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:53,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:53,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768785773] [2022-01-09 22:49:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:53,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:53,557 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) [2022-01-09 22:49:53,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:49:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:53,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 22:49:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:49:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:49:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:49:54,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496134325] [2022-01-09 22:49:54,857 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768785773] [2022-01-09 22:49:54,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768785773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:49:54,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:49:54,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-01-09 22:49:54,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728825157] [2022-01-09 22:49:54,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:49:54,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 22:49:54,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 22:49:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:49:54,859 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-09 22:49:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:55,522 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-01-09 22:49:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 22:49:55,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-01-09 22:49:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:55,526 INFO L225 Difference]: With dead ends: 73 [2022-01-09 22:49:55,526 INFO L226 Difference]: Without dead ends: 66 [2022-01-09 22:49:55,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:49:55,527 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:55,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 104 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:49:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-09 22:49:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-01-09 22:49:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 22:49:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-01-09 22:49:55,533 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2022-01-09 22:49:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-01-09 22:49:55,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-09 22:49:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-01-09 22:49:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 22:49:55,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:55,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:55,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:49:55,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:55,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 685673296, now seen corresponding path program 1 times [2022-01-09 22:49:55,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392908695] [2022-01-09 22:49:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:55,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:55,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:55,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241440847] [2022-01-09 22:49:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:55,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:55,758 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) [2022-01-09 22:49:55,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:49:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 22:49:55,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 22:49:55,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:49:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 22:49:55,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392908695] [2022-01-09 22:49:55,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241440847] [2022-01-09 22:49:55,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241440847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:49:55,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:49:55,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-09 22:49:55,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098450837] [2022-01-09 22:49:55,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:49:55,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:49:55,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:49:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:49:55,976 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 22:49:57,983 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:49:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:58,051 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-01-09 22:49:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 22:49:58,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-09 22:49:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:58,052 INFO L225 Difference]: With dead ends: 61 [2022-01-09 22:49:58,052 INFO L226 Difference]: Without dead ends: 54 [2022-01-09 22:49:58,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:49:58,052 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:58,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 109 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-09 22:49:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-09 22:49:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-09 22:49:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 22:49:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-09 22:49:58,058 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 39 [2022-01-09 22:49:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:58,058 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-09 22:49:58,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 22:49:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-09 22:49:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-09 22:49:58,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:58,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:58,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:49:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:58,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -662815268, now seen corresponding path program 1 times [2022-01-09 22:49:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488666202] [2022-01-09 22:49:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:58,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:58,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:58,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002181560] [2022-01-09 22:49:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:58,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:58,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:58,296 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:49:58,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:49:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-09 22:49:58,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:50:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 22:50:04,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:50:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 22:50:07,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:50:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488666202] [2022-01-09 22:50:07,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:50:07,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002181560] [2022-01-09 22:50:07,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002181560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:50:07,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:50:07,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-09 22:50:07,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365190111] [2022-01-09 22:50:07,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:50:07,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 22:50:07,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:50:07,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 22:50:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:50:07,880 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-09 22:50:11,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:50:13,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:50:21,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:50:26,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:50:26,934 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2022-01-09 22:50:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-09 22:50:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2022-01-09 22:50:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:50:26,935 INFO L225 Difference]: With dead ends: 79 [2022-01-09 22:50:26,935 INFO L226 Difference]: Without dead ends: 77 [2022-01-09 22:50:26,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=124, Invalid=475, Unknown=1, NotChecked=0, Total=600 [2022-01-09 22:50:26,936 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-01-09 22:50:26,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 219 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 243 Invalid, 3 Unknown, 27 Unchecked, 7.9s Time] [2022-01-09 22:50:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-09 22:50:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2022-01-09 22:50:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-09 22:50:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-01-09 22:50:26,942 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 42 [2022-01-09 22:50:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:50:26,942 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-01-09 22:50:26,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-09 22:50:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-01-09 22:50:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 22:50:26,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:50:26,943 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:50:26,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:50:27,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:50:27,144 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:50:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:50:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1448142086, now seen corresponding path program 2 times [2022-01-09 22:50:27,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:50:27,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819147031] [2022-01-09 22:50:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:50:27,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:50:27,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:50:27,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552588203] [2022-01-09 22:50:27,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:50:27,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:50:27,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:50:27,154 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:50:27,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 22:50:27,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:50:27,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:50:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 22:50:27,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:50:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:50:27,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:50:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:50:28,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:50:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819147031] [2022-01-09 22:50:28,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:50:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552588203] [2022-01-09 22:50:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552588203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:50:28,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:50:28,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2022-01-09 22:50:28,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689024620] [2022-01-09 22:50:28,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:50:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-09 22:50:28,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:50:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-09 22:50:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-09 22:50:28,174 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-09 22:50:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:50:28,550 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2022-01-09 22:50:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 22:50:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 60 [2022-01-09 22:50:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:50:28,552 INFO L225 Difference]: With dead ends: 103 [2022-01-09 22:50:28,552 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 22:50:28,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2022-01-09 22:50:28,553 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:50:28,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 209 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-01-09 22:50:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-09 22:50:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-01-09 22:50:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-09 22:50:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-09 22:50:28,559 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 60 [2022-01-09 22:50:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:50:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-09 22:50:28,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-09 22:50:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-09 22:50:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 22:50:28,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:50:28,561 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:50:28,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 22:50:28,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:50:28,767 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:50:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:50:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash 602841912, now seen corresponding path program 3 times [2022-01-09 22:50:28,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:50:28,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154794977] [2022-01-09 22:50:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:50:28,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:50:28,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:50:28,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372989013] [2022-01-09 22:50:28,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:50:28,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:50:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:50:28,780 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:50:28,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 22:50:28,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-09 22:50:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:50:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-09 22:50:28,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:50:31,384 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 22:50:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-09 22:50:32,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:50:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 22:50:34,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:50:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154794977] [2022-01-09 22:50:34,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:50:34,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372989013] [2022-01-09 22:50:34,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372989013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:50:34,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:50:34,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-01-09 22:50:34,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219692710] [2022-01-09 22:50:34,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:50:34,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 22:50:34,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:50:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 22:50:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=268, Unknown=1, NotChecked=0, Total=342 [2022-01-09 22:50:34,264 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-09 22:50:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:50:35,295 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-01-09 22:50:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 22:50:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2022-01-09 22:50:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:50:35,296 INFO L225 Difference]: With dead ends: 87 [2022-01-09 22:50:35,296 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 22:50:35,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=129, Invalid=470, Unknown=1, NotChecked=0, Total=600 [2022-01-09 22:50:35,297 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:50:35,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 107 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-01-09 22:50:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 22:50:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-09 22:50:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 22:50:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-01-09 22:50:35,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 60 [2022-01-09 22:50:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:50:35,302 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-01-09 22:50:35,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-09 22:50:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-01-09 22:50:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 22:50:35,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:50:35,303 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:50:35,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 22:50:35,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-09 22:50:35,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:50:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:50:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash 743390522, now seen corresponding path program 2 times [2022-01-09 22:50:35,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:50:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912425087] [2022-01-09 22:50:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:50:35,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:50:35,526 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:50:35,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347855381] [2022-01-09 22:50:35,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:50:35,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:50:35,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:50:35,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:50:35,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 22:50:35,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:50:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:50:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 22:50:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:50:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:50:35,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:50:35,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:50:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912425087] [2022-01-09 22:50:35,810 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:50:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347855381] [2022-01-09 22:50:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347855381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:50:35,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:50:35,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-09 22:50:35,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600238772] [2022-01-09 22:50:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:50:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:50:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:50:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:50:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:50:35,811 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-09 22:50:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:50:35,974 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-01-09 22:50:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:50:35,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 60 [2022-01-09 22:50:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:50:35,975 INFO L225 Difference]: With dead ends: 49 [2022-01-09 22:50:35,975 INFO L226 Difference]: Without dead ends: 0 [2022-01-09 22:50:35,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:50:35,976 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:50:35,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:50:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-09 22:50:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-09 22:50:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:50:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-09 22:50:35,977 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2022-01-09 22:50:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:50:35,977 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-09 22:50:35,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-09 22:50:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-09 22:50:35,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-09 22:50:35,979 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-09 22:50:35,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 22:50:36,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 22:50:36,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-09 22:50:41,253 WARN L228 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 139 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-01-09 22:50:44,714 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-09 22:50:44,715 INFO L861 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-01-09 22:50:44,715 INFO L854 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~b~0#1| 10)) [2022-01-09 22:50:44,715 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-01-09 22:50:44,715 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-01-09 22:50:44,715 INFO L861 garLoopResultBuilder]: At program point L48(lines 20 49) the Hoare annotation is: true [2022-01-09 22:50:44,715 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-01-09 22:50:44,715 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 10))) (or (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse2 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~y~0#1| 4) (exists ((|aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| Int) (|aux_div_v_ULTIMATE.start_main_~y~0#1_44_41| Int)) (let ((.cse4 (* |aux_div_v_ULTIMATE.start_main_~y~0#1_44_41| 2))) (and (= (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (let ((.cse3 (div |ULTIMATE.start_main_~x~0#1| 2))) (+ (* |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse3) |ULTIMATE.start_main_~z~0#1| (* 2 (* .cse3 |aux_div_v_ULTIMATE.start_main_~y~0#1_44_41|))))) (< 0 (+ |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse4 1)) (not (= |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| 1)) (= |ULTIMATE.start_main_~y~0#1| (div (+ |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse4) 2)) (<= 0 |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41|) (< |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| 2)))) .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0)) (and (< |ULTIMATE.start_main_~y~0#1| 2) .cse0 .cse5 (< 0 (+ |ULTIMATE.start_main_~y~0#1| 1))) (and (< 0 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1 (< |ULTIMATE.start_main_~y~0#1| 3)))) [2022-01-09 22:50:44,715 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-09 22:50:44,715 INFO L854 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2022-01-09 22:50:44,715 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse0 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse5 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 10))) (or (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse2 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))) (and (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (and (<= |ULTIMATE.start_main_~y~0#1| 4) (exists ((|aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| Int) (|aux_div_v_ULTIMATE.start_main_~y~0#1_44_41| Int)) (let ((.cse4 (* |aux_div_v_ULTIMATE.start_main_~y~0#1_44_41| 2))) (and (= (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) (let ((.cse3 (div |ULTIMATE.start_main_~x~0#1| 2))) (+ (* |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse3) |ULTIMATE.start_main_~z~0#1| (* 2 (* .cse3 |aux_div_v_ULTIMATE.start_main_~y~0#1_44_41|))))) (< 0 (+ |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse4 1)) (not (= |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| 1)) (= |ULTIMATE.start_main_~y~0#1| (div (+ |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| .cse4) 2)) (<= 0 |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41|) (< |aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41| 2)))) .cse0 (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0)) (and (< |ULTIMATE.start_main_~y~0#1| 2) .cse0 .cse5 (< 0 (+ |ULTIMATE.start_main_~y~0#1| 1))) (and (< 0 |ULTIMATE.start_main_~y~0#1|) .cse0 .cse5 .cse1 (< |ULTIMATE.start_main_~y~0#1| 3)))) [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-01-09 22:50:44,716 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-01-09 22:50:44,717 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-01-09 22:50:44,719 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-01-09 22:50:44,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-09 22:50:44,724 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,725 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,730 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,731 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,731 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,731 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 10:50:44 BoogieIcfgContainer [2022-01-09 22:50:44,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-09 22:50:44,732 INFO L158 Benchmark]: Toolchain (without parser) took 74084.68ms. Allocated memory was 203.4MB in the beginning and 329.3MB in the end (delta: 125.8MB). Free memory was 146.9MB in the beginning and 166.2MB in the end (delta: -19.3MB). Peak memory consumption was 106.9MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,732 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-09 22:50:44,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.02ms. Allocated memory was 203.4MB in the beginning and 329.3MB in the end (delta: 125.8MB). Free memory was 146.7MB in the beginning and 300.5MB in the end (delta: -153.8MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.42ms. Allocated memory is still 329.3MB. Free memory was 300.5MB in the beginning and 299.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,733 INFO L158 Benchmark]: Boogie Preprocessor took 18.16ms. Allocated memory is still 329.3MB. Free memory was 299.5MB in the beginning and 298.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,733 INFO L158 Benchmark]: RCFGBuilder took 206.54ms. Allocated memory is still 329.3MB. Free memory was 298.4MB in the beginning and 286.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,733 INFO L158 Benchmark]: TraceAbstraction took 73624.63ms. Allocated memory is still 329.3MB. Free memory was 286.3MB in the beginning and 166.2MB in the end (delta: 120.2MB). Peak memory consumption was 119.7MB. Max. memory is 8.0GB. [2022-01-09 22:50:44,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 163.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.02ms. Allocated memory was 203.4MB in the beginning and 329.3MB in the end (delta: 125.8MB). Free memory was 146.7MB in the beginning and 300.5MB in the end (delta: -153.8MB). Peak memory consumption was 6.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.42ms. Allocated memory is still 329.3MB. Free memory was 300.5MB in the beginning and 299.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.16ms. Allocated memory is still 329.3MB. Free memory was 299.5MB in the beginning and 298.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 206.54ms. Allocated memory is still 329.3MB. Free memory was 298.4MB in the beginning and 286.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 73624.63ms. Allocated memory is still 329.3MB. Free memory was 286.3MB in the beginning and 166.2MB in the end (delta: 120.2MB). Peak memory consumption was 119.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 73.6s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 32.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 8.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 214 SdHoareTripleChecker+Valid, 19.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 205 mSDsluCounter, 1326 SdHoareTripleChecker+Invalid, 19.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 66 IncrementalHoareTripleChecker+Unchecked, 1102 mSDsCounter, 131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1191 IncrementalHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 131 mSolverCounterUnsat, 224 mSDtfsCounter, 1191 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 533 SyntacticMatches, 13 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 29.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=8, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 47 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 33 PreInvPairs, 61 NumberOfFragments, 320 HoareAnnotationTreeSize, 33 FomulaSimplifications, 117 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2549 FormulaSimplificationTreeSizeReductionInter, 8.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 405 NumberOfCodeBlocks, 396 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 656 ConstructedInterpolants, 4 QuantifiedInterpolants, 3519 SizeOfPredicates, 33 NumberOfNonLiveVariables, 974 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 568/616 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,743 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,744 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] [2022-01-09 22:50:44,745 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41,QUANTIFIED] Derived loop invariant: ((((((((y == b / 2 && 1 <= b) && b <= 10) && x == 2 * a) && z == 0) && !(b % 2 == 1)) || ((((b == y && 1 <= b) && b <= 10) && z == 0) && a == x)) || (((y <= 4 && (\exists aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 : int, aux_div_v_ULTIMATE.start_main_~y~0#1_44_41 : int :: ((((a * b == aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 * (x / 2) + z + 2 * (x / 2 * aux_div_v_ULTIMATE.start_main_~y~0#1_44_41) && 0 < aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 + aux_div_v_ULTIMATE.start_main_~y~0#1_44_41 * 2 + 1) && !(aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 == 1)) && y == (aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 + aux_div_v_ULTIMATE.start_main_~y~0#1_44_41 * 2) / 2) && 0 <= aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41) && aux_mod_v_ULTIMATE.start_main_~y~0#1_44_41 < 2)) && 1 <= b) && x % 2 == 0)) || (((y < 2 && 1 <= b) && z + x * y == a * b) && 0 < y + 1)) || ((((0 < y && 1 <= b) && z + x * y == a * b) && b <= 10) && y < 3) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-01-09 22:50:44,768 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...