/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/prod4br-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:48:37,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:48:37,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:48:37,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:48:37,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:48:37,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:48:37,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:48:37,121 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 22:48:37,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:48:37,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:48:37,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:48:37,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:48:37,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:48:37,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:48:37,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:48:37,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:48:37,146 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:48:37,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:48:37,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:48:37,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:48:37,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:48:37,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:48:37,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:48:37,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:48:37,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:48:37,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:48:37,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:48:37,316 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:48:37,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c [2022-01-09 22:48:37,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902fbbfa4/b1b974fb4ec84b689c7750323f5287ea/FLAGdee2b810f [2022-01-09 22:48:37,709 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:48:37,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c [2022-01-09 22:48:37,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902fbbfa4/b1b974fb4ec84b689c7750323f5287ea/FLAGdee2b810f [2022-01-09 22:48:37,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902fbbfa4/b1b974fb4ec84b689c7750323f5287ea [2022-01-09 22:48:37,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:48:37,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:48:37,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:48:37,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:48:37,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:48:37,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:37,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e4e0106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37, skipping insertion in model container [2022-01-09 22:48:37,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:37,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:48:37,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:48:37,896 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/prod4br-ll_valuebound20.c[524,537] [2022-01-09 22:48:37,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:48:37,929 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:48:37,938 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/prod4br-ll_valuebound20.c[524,537] [2022-01-09 22:48:37,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:48:37,966 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:48:37,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37 WrapperNode [2022-01-09 22:48:37,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:48:37,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:48:37,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:48:37,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:48:37,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:37,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,003 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-01-09 22:48:38,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:48:38,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:48:38,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:48:38,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:48:38,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:48:38,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:48:38,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:48:38,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:48:38,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (1/1) ... [2022-01-09 22:48:38,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:48:38,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:38,048 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 22:48:38,057 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 22:48:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:48:38,076 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-09 22:48:38,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-09 22:48:38,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:48:38,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:48:38,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:48:38,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:48:38,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:48:38,112 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:48:38,113 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:48:38,237 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:48:38,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:48:38,240 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:48:38,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:48:38 BoogieIcfgContainer [2022-01-09 22:48:38,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:48:38,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:48:38,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:48:38,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:48:38,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:48:37" (1/3) ... [2022-01-09 22:48:38,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73402de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:48:38, skipping insertion in model container [2022-01-09 22:48:38,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:48:37" (2/3) ... [2022-01-09 22:48:38,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73402de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:48:38, skipping insertion in model container [2022-01-09 22:48:38,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:48:38" (3/3) ... [2022-01-09 22:48:38,263 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound20.c [2022-01-09 22:48:38,266 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:48:38,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:48:38,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:48:38,295 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 22:48:38,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:48:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:48:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 22:48:38,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:38,315 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 22:48:38,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1472905330, now seen corresponding path program 1 times [2022-01-09 22:48:38,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:38,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731341546] [2022-01-09 22:48:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:38,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:38,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-09 22:48:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:38,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-09 22:48:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:38,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-09 22:48:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:38,487 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 22:48:38,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731341546] [2022-01-09 22:48:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731341546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:38,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:38,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:48:38,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146596860] [2022-01-09 22:48:38,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:38,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:48:38,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:48:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:48:38,519 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 22:48:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:38,537 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-01-09 22:48:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:48:38,539 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 22:48:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:38,544 INFO L225 Difference]: With dead ends: 55 [2022-01-09 22:48:38,544 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 22:48:38,546 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 22:48:38,549 INFO L933 BasicCegarLoop]: 36 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, 36 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 22:48:38,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 22:48:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-09 22:48:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 22:48:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-09 22:48:38,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 24 [2022-01-09 22:48:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:38,574 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-09 22:48:38,574 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 22:48:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-09 22:48:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 22:48:38,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:38,576 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 22:48:38,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:48:38,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash 324198000, now seen corresponding path program 1 times [2022-01-09 22:48:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:38,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197795161] [2022-01-09 22:48:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:38,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:38,606 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199045861] [2022-01-09 22:48:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:38,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:38,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:38,608 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 22:48:38,610 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 22:48:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:38,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:48:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:38,789 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 22:48:38,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:48:38,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197795161] [2022-01-09 22:48:38,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199045861] [2022-01-09 22:48:38,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199045861] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:48:38,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:48:38,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:48:38,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894522340] [2022-01-09 22:48:38,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:48:38,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:48:38,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:38,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:48:38,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:48:38,792 INFO L87 Difference]: Start difference. First operand 25 states and 32 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 22:48:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:38,862 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-01-09 22:48:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:48:38,863 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 22:48:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:38,864 INFO L225 Difference]: With dead ends: 39 [2022-01-09 22:48:38,865 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 22:48:38,865 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 22:48:38,867 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:38,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:48:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 22:48:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-01-09 22:48:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:48:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-01-09 22:48:38,882 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 24 [2022-01-09 22:48:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:38,882 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-01-09 22:48:38,882 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 22:48:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-01-09 22:48:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 22:48:38,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:38,883 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 22:48:38,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 22:48:39,091 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 22:48:39,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash 693549193, now seen corresponding path program 1 times [2022-01-09 22:48:39,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:39,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359947727] [2022-01-09 22:48:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:39,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:39,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:39,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763103691] [2022-01-09 22:48:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:39,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:39,107 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 22:48:39,109 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 22:48:39,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 22:48:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:39,229 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-09 22:48:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:48:39,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:48:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:48:39,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:39,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359947727] [2022-01-09 22:48:39,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:39,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763103691] [2022-01-09 22:48:39,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763103691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:48:39,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:48:39,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-01-09 22:48:39,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629988156] [2022-01-09 22:48:39,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:48:39,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 22:48:39,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:39,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 22:48:39,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:48:39,580 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 22:48:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:48:40,582 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-01-09 22:48:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 22:48:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-01-09 22:48:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:48:40,584 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:48:40,584 INFO L226 Difference]: Without dead ends: 43 [2022-01-09 22:48:40,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:48:40,585 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 22:48:40,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-09 22:48:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-09 22:48:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-09 22:48:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 22:48:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-01-09 22:48:40,590 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 30 [2022-01-09 22:48:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:48:40,591 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-01-09 22:48:40,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 22:48:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-01-09 22:48:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-09 22:48:40,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:48:40,592 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] [2022-01-09 22:48:40,613 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 22:48:40,809 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 22:48:40,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:48:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:48:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1087866724, now seen corresponding path program 1 times [2022-01-09 22:48:40,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:48:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967637775] [2022-01-09 22:48:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:40,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:48:40,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:48:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742921298] [2022-01-09 22:48:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:48:40,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:48:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:48:40,820 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 22:48:40,821 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 22:48:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:48:40,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-09 22:48:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:48:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:48:45,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:48:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 22:48:53,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:48:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967637775] [2022-01-09 22:48:53,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:48:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742921298] [2022-01-09 22:48:53,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742921298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:48:53,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:48:53,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-01-09 22:48:53,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256417314] [2022-01-09 22:48:53,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:48:53,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-09 22:48:53,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:48:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-09 22:48:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-09 22:48:53,117 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-09 22:49:20,373 WARN L228 SmtUtils]: Spent 25.72s on a formula simplification. DAG size of input: 61 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-09 22:49:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:21,233 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2022-01-09 22:49:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 22:49:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-01-09 22:49:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:21,234 INFO L225 Difference]: With dead ends: 64 [2022-01-09 22:49:21,235 INFO L226 Difference]: Without dead ends: 60 [2022-01-09 22:49:21,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-09 22:49:21,236 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:21,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 149 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-09 22:49:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-09 22:49:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2022-01-09 22:49:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 22:49:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-01-09 22:49:21,263 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 32 [2022-01-09 22:49:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:21,263 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-01-09 22:49:21,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-09 22:49:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-01-09 22:49:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-09 22:49:21,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:21,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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 22:49:21,282 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 22:49:21,466 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 22:49:21,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash 420635516, now seen corresponding path program 1 times [2022-01-09 22:49:21,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20641532] [2022-01-09 22:49:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:21,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:21,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:21,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994275009] [2022-01-09 22:49:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:21,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:21,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:21,477 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 22:49:21,478 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 22:49:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:21,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-09 22:49:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:49:21,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:49:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:49:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20641532] [2022-01-09 22:49:21,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994275009] [2022-01-09 22:49:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994275009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:49:21,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:49:21,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-09 22:49:21,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935754434] [2022-01-09 22:49:21,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:49:21,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 22:49:21,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:21,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 22:49:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:49:21,855 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-09 22:49:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:21,943 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-01-09 22:49:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:49:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 43 [2022-01-09 22:49:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:21,946 INFO L225 Difference]: With dead ends: 55 [2022-01-09 22:49:21,946 INFO L226 Difference]: Without dead ends: 45 [2022-01-09 22:49:21,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:49:21,947 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 154 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:49:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-09 22:49:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-01-09 22:49:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 22:49:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-09 22:49:21,953 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 43 [2022-01-09 22:49:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:21,954 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-09 22:49:21,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-01-09 22:49:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-09 22:49:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 22:49:21,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:49:21,955 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:49:21,979 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 22:49:22,170 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 22:49:22,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:49:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:49:22,171 INFO L85 PathProgramCache]: Analyzing trace with hash 97606081, now seen corresponding path program 1 times [2022-01-09 22:49:22,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:49:22,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49720151] [2022-01-09 22:49:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:22,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:49:22,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:49:22,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8737046] [2022-01-09 22:49:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:49:22,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:49:22,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:49:22,186 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 22:49:22,187 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 22:49:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:49:22,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:49:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:49:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-09 22:49:22,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:49:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 22:49:22,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:49:22,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49720151] [2022-01-09 22:49:22,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:49:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8737046] [2022-01-09 22:49:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8737046] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-09 22:49:22,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:49:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-01-09 22:49:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036086412] [2022-01-09 22:49:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:49:22,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:49:22,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:49:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:49:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:49:22,428 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 22:49:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:49:22,591 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-01-09 22:49:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:49:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2022-01-09 22:49:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:49:22,591 INFO L225 Difference]: With dead ends: 45 [2022-01-09 22:49:22,591 INFO L226 Difference]: Without dead ends: 0 [2022-01-09 22:49:22,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:49:22,592 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:49:22,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 103 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:49:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-09 22:49:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-09 22:49:22,593 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 22:49:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-09 22:49:22,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2022-01-09 22:49:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:49:22,593 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-09 22:49:22,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 22:49:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-09 22:49:22,593 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-09 22:49:22,595 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-09 22:49:22,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-09 22:49:22,810 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 22:49:22,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-09 22:49:23,406 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-09 22:49:23,406 INFO L858 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2022-01-09 22:49:23,406 INFO L858 garLoopResultBuilder]: For program point L58(line 58) no Hoare annotation was computed. [2022-01-09 22:49:23,406 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 54) no Hoare annotation was computed. [2022-01-09 22:49:23,406 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 54) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|))) (or (and .cse0 (<= 0 |ULTIMATE.start_main_~x~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~p~0#1|) .cse1 (<= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0)))) [2022-01-09 22:49:23,407 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L861 garLoopResultBuilder]: At program point L59(lines 19 60) the Hoare annotation is: true [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (or (= (mod |ULTIMATE.start_main_~y~0#1| 2) 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (let ((.cse0 (div |ULTIMATE.start_main_~x~0#1| 2))) (+ (* 4 (* .cse0 (div |ULTIMATE.start_main_~y~0#1| 2))) (* .cse0 4)))) (<= 0 |ULTIMATE.start_main_~y~0#1|) (not (<= (mod |ULTIMATE.start_main_~x~0#1| 2) 0))) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|))) (or (and .cse0 (<= 0 |ULTIMATE.start_main_~x~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|) 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~p~0#1|) .cse1 (<= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~a~0#1| 0)))) [2022-01-09 22:49:23,407 INFO L861 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-01-09 22:49:23,407 INFO L858 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L858 garLoopResultBuilder]: For program point L47(lines 47 54) no Hoare annotation was computed. [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~p~0#1|)) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2022-01-09 22:49:23,407 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= (+ |ULTIMATE.start_main_~q~0#1| (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~p~0#1|)) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L35-1(lines 34 55) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-01-09 22:49:23,408 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-01-09 22:49:23,410 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-01-09 22:49:23,411 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-09 22:49:23,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.01 10:49:23 BoogieIcfgContainer [2022-01-09 22:49:23,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-09 22:49:23,419 INFO L158 Benchmark]: Toolchain (without parser) took 45695.88ms. Allocated memory was 197.1MB in the beginning and 254.8MB in the end (delta: 57.7MB). Free memory was 147.6MB in the beginning and 92.8MB in the end (delta: 54.8MB). Peak memory consumption was 114.0MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,419 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory was 163.9MB in the beginning and 163.7MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-09 22:49:23,419 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.97ms. Allocated memory is still 197.1MB. Free memory was 147.3MB in the beginning and 173.5MB in the end (delta: -26.3MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,419 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.01ms. Allocated memory is still 197.1MB. Free memory was 173.5MB in the beginning and 171.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,420 INFO L158 Benchmark]: Boogie Preprocessor took 18.82ms. Allocated memory is still 197.1MB. Free memory was 171.4MB in the beginning and 170.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,420 INFO L158 Benchmark]: RCFGBuilder took 218.51ms. Allocated memory is still 197.1MB. Free memory was 170.4MB in the beginning and 159.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,420 INFO L158 Benchmark]: TraceAbstraction took 45176.08ms. Allocated memory was 197.1MB in the beginning and 254.8MB in the end (delta: 57.7MB). Free memory was 158.8MB in the beginning and 92.8MB in the end (delta: 66.1MB). Peak memory consumption was 125.3MB. Max. memory is 8.0GB. [2022-01-09 22:49:23,421 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 197.1MB. Free memory was 163.9MB in the beginning and 163.7MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.97ms. Allocated memory is still 197.1MB. Free memory was 147.3MB in the beginning and 173.5MB in the end (delta: -26.3MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.01ms. Allocated memory is still 197.1MB. Free memory was 173.5MB in the beginning and 171.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.82ms. Allocated memory is still 197.1MB. Free memory was 171.4MB in the beginning and 170.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 218.51ms. Allocated memory is still 197.1MB. Free memory was 170.4MB in the beginning and 159.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 45176.08ms. Allocated memory was 197.1MB in the beginning and 254.8MB in the end (delta: 57.7MB). Free memory was 158.8MB in the beginning and 92.8MB in the end (delta: 66.1MB). Peak memory consumption was 125.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45.1s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 29.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 131 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 124 mSDsluCounter, 635 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 564 IncrementalHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 146 mSDtfsCounter, 564 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 344 GetRequests, 275 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 26 PreInvPairs, 41 NumberOfFragments, 182 HoareAnnotationTreeSize, 26 FomulaSimplifications, 296 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 1292 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 198 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 1761 SizeOfPredicates, 23 NumberOfNonLiveVariables, 494 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 183/216 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: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((0 <= x && 1 <= y) && q + a * b * p == x * y) && 0 <= a) && x <= 20 RESULT: Ultimate proved your program to be correct! [2022-01-09 22:49:23,439 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...