/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:15:55,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:15:55,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:15:55,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 05:15:55,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:15:55,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:15:55,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:15:55,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:15:55,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:15:55,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:15:55,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:15:55,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:15:55,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:15:55,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:15:55,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:15:55,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:15:55,706 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:15:55,706 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:15:55,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:15:55,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:15:55,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:15:55,877 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:15:55,877 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:15:55,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2022-03-18 05:15:55,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3593ee6a/bce8fc9aeaf444e6944ae3da6c9549a5/FLAG3a5ab1c6d [2022-03-18 05:15:56,275 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:15:56,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2022-03-18 05:15:56,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3593ee6a/bce8fc9aeaf444e6944ae3da6c9549a5/FLAG3a5ab1c6d [2022-03-18 05:15:56,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3593ee6a/bce8fc9aeaf444e6944ae3da6c9549a5 [2022-03-18 05:15:56,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:15:56,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:15:56,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:15:56,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:15:56,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:15:56,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab92296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56, skipping insertion in model container [2022-03-18 05:15:56,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:15:56,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:15:56,870 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/sqrt1-ll_valuebound10.c[520,533] [2022-03-18 05:15:56,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:15:56,890 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:15:56,909 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/sqrt1-ll_valuebound10.c[520,533] [2022-03-18 05:15:56,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:15:56,921 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:15:56,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56 WrapperNode [2022-03-18 05:15:56,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:15:56,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:15:56,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:15:56,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:15:56,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:15:56,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:15:56,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:15:56,956 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:15:56,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (1/1) ... [2022-03-18 05:15:56,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:15:56,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:15:56,998 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) [2022-03-18 05:15:57,000 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 [2022-03-18 05:15:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:15:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:15:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:15:57,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 05:15:57,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 05:15:57,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:15:57,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:15:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:15:57,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:15:57,122 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:15:57,124 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:15:57,305 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:15:57,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:15:57,311 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:15:57,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:15:57 BoogieIcfgContainer [2022-03-18 05:15:57,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:15:57,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:15:57,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:15:57,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:15:57,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:15:56" (1/3) ... [2022-03-18 05:15:57,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210330a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:15:57, skipping insertion in model container [2022-03-18 05:15:57,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:15:56" (2/3) ... [2022-03-18 05:15:57,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210330a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:15:57, skipping insertion in model container [2022-03-18 05:15:57,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:15:57" (3/3) ... [2022-03-18 05:15:57,345 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c [2022-03-18 05:15:57,349 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:15:57,350 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:15:57,419 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:15:57,427 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 05:15:57,427 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:15:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:15:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:15:57,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:15:57,449 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:15:57,450 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:15:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:15:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-18 05:15:57,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:57,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610335840] [2022-03-18 05:15:57,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:15:57,489 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-18 05:15:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:15:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123896166] [2022-03-18 05:15:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:57,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:15:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:15:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:15:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:15:57,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:15:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123896166] [2022-03-18 05:15:57,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123896166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:57,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:57,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:15:57,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:15:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610335840] [2022-03-18 05:15:57,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610335840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:57,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:57,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:15:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938279220] [2022-03-18 05:15:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:15:57,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 05:15:57,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 05:15:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:15:57,681 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:15:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:15:57,791 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-18 05:15:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 05:15:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:15:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:15:57,799 INFO L225 Difference]: With dead ends: 53 [2022-03-18 05:15:57,799 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 05:15:57,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:15:57,804 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:15:57,805 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:15:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 05:15:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-18 05:15:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 05:15:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-18 05:15:57,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-18 05:15:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:15:57,852 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-18 05:15:57,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:15:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-18 05:15:57,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:15:57,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:15:57,853 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:15:57,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:15:57,854 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:15:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:15:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-18 05:15:57,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:57,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776446014] [2022-03-18 05:15:57,861 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:15:57,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-18 05:15:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:15:57,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836309514] [2022-03-18 05:15:57,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:57,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:15:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:15:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:15:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:15:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:15:57,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836309514] [2022-03-18 05:15:57,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836309514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:57,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:15:57,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:15:57,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776446014] [2022-03-18 05:15:57,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776446014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:57,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:57,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:15:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553033226] [2022-03-18 05:15:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:15:57,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:15:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:15:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:15:57,962 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:15:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:15:58,247 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 05:15:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:15:58,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:15:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:15:58,255 INFO L225 Difference]: With dead ends: 40 [2022-03-18 05:15:58,256 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 05:15:58,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:15:58,261 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:15:58,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 05:15:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 05:15:58,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 05:15:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 05:15:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 05:15:58,278 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-03-18 05:15:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:15:58,279 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 05:15:58,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:15:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 05:15:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 05:15:58,280 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:15:58,280 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:15:58,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:15:58,280 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:15:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:15:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-03-18 05:15:58,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:58,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569949078] [2022-03-18 05:15:58,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:15:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-03-18 05:15:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:15:58,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206673112] [2022-03-18 05:15:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:15:58,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:15:58,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205376166] [2022-03-18 05:15:58,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:15:58,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:15:58,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:15:58,324 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) [2022-03-18 05:15:58,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 05:15:58,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:15:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:15:58,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:15:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:15:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:15:58,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:15:58,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:15:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206673112] [2022-03-18 05:15:58,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:15:58,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205376166] [2022-03-18 05:15:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205376166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:58,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:15:58,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:15:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569949078] [2022-03-18 05:15:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569949078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:58,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:58,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:15:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550380629] [2022-03-18 05:15:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:15:58,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:15:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:58,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:15:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:15:58,535 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:15:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:15:58,606 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-18 05:15:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:15:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 05:15:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:15:58,610 INFO L225 Difference]: With dead ends: 44 [2022-03-18 05:15:58,610 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 05:15:58,611 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:15:58,618 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:15:58,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:15:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 05:15:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-18 05:15:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 05:15:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-03-18 05:15:58,636 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-03-18 05:15:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:15:58,636 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-03-18 05:15:58,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:15:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-03-18 05:15:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:15:58,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:15:58,637 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:15:58,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 05:15:58,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:15:58,838 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:15:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:15:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-03-18 05:15:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:58,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326831617] [2022-03-18 05:15:58,839 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:15:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-03-18 05:15:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:15:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013508346] [2022-03-18 05:15:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:58,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:15:58,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:15:58,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905388371] [2022-03-18 05:15:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:15:58,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:15:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:15:58,858 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) [2022-03-18 05:15:58,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 05:15:58,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:15:58,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:15:58,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:15:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:15:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 05:15:58,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:15:58,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:15:58,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013508346] [2022-03-18 05:15:58,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:15:58,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905388371] [2022-03-18 05:15:58,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905388371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:58,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:58,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:15:58,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:15:58,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326831617] [2022-03-18 05:15:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326831617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:58,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:58,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:15:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007217270] [2022-03-18 05:15:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:15:58,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:15:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:15:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:15:58,997 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:15:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:15:59,034 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-18 05:15:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:15:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 05:15:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:15:59,038 INFO L225 Difference]: With dead ends: 48 [2022-03-18 05:15:59,038 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 05:15:59,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:15:59,043 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:15:59,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:15:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 05:15:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 05:15:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 05:15:59,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-18 05:15:59,062 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-03-18 05:15:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:15:59,062 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-18 05:15:59,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:15:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-18 05:15:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:15:59,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:15:59,063 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:15:59,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 05:15:59,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 05:15:59,280 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:15:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:15:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-03-18 05:15:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:15:59,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2028838873] [2022-03-18 05:15:59,815 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:15:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-03-18 05:15:59,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:15:59,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088578937] [2022-03-18 05:15:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:59,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:15:59,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:15:59,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096473791] [2022-03-18 05:15:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:15:59,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:15:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:15:59,842 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) [2022-03-18 05:15:59,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 05:15:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:15:59,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 05:15:59,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:15:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:15:59,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:15:59,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:15:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088578937] [2022-03-18 05:15:59,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:15:59,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096473791] [2022-03-18 05:15:59,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096473791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:15:59,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:15:59,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:16:34,497 WARN L232 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:16:34,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:16:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2028838873] [2022-03-18 05:16:34,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2028838873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:16:34,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:16:34,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:16:34,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508816335] [2022-03-18 05:16:34,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:16:34,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 05:16:34,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:16:34,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 05:16:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2022-03-18 05:16:34,571 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:16:48,801 WARN L232 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:16:50,914 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 [] [2022-03-18 05:16:52,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:16:55,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:16:57,065 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 [] [2022-03-18 05:16:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:16:57,071 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-03-18 05:16:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:16:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-03-18 05:16:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:16:57,072 INFO L225 Difference]: With dead ends: 57 [2022-03-18 05:16:57,072 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 05:16:57,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=89, Invalid=360, Unknown=13, NotChecked=0, Total=462 [2022-03-18 05:16:57,073 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:16:57,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 129 Invalid, 4 Unknown, 41 Unchecked, 8.2s Time] [2022-03-18 05:16:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 05:16:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 05:16:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:16:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-18 05:16:57,085 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 34 [2022-03-18 05:16:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:16:57,086 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-18 05:16:57,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:16:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-18 05:16:57,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:16:57,088 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:16:57,088 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:16:57,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 05:16:57,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:16:57,298 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:16:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:16:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-03-18 05:16:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:16:57,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2066098747] [2022-03-18 05:16:57,778 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:16:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1515990761, now seen corresponding path program 1 times [2022-03-18 05:16:57,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:16:57,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533520110] [2022-03-18 05:16:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:16:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:16:57,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:16:57,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818751923] [2022-03-18 05:16:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:16:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:16:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:16:57,820 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) [2022-03-18 05:16:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 05:16:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:16:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 05:16:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:16:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:16:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 05:16:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:16:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:16:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533520110] [2022-03-18 05:16:58,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:16:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818751923] [2022-03-18 05:16:58,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818751923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 05:16:58,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 05:16:58,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 05:17:34,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:17:34,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2066098747] [2022-03-18 05:17:34,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2066098747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:17:34,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:17:34,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:17:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825362003] [2022-03-18 05:17:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:17:34,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:17:34,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:17:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:17:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-18 05:17:34,484 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:17:48,786 WARN L232 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:17:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:17:48,933 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-03-18 05:17:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:17:48,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 05:17:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:17:48,934 INFO L225 Difference]: With dead ends: 54 [2022-03-18 05:17:48,934 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 05:17:48,935 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-03-18 05:17:48,935 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:17:48,936 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-18 05:17:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 05:17:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 05:17:48,936 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) [2022-03-18 05:17:48,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 05:17:48,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-03-18 05:17:48,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:17:48,937 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 05:17:48,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:17:48,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 05:17:48,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 05:17:48,941 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 05:17:48,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 05:17:49,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:17:49,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 05:17:55,421 WARN L232 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 44 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:18:09,583 WARN L232 SmtUtils]: Spent 10.06s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:18:26,037 WARN L232 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:18:46,003 WARN L232 SmtUtils]: Spent 19.96s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:18:46,083 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-18 05:18:46,083 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-18 05:18:46,083 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-18 05:18:46,083 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-18 05:18:46,083 INFO L885 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: true [2022-03-18 05:18:46,083 INFO L885 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: true [2022-03-18 05:18:46,083 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: true [2022-03-18 05:18:46,083 INFO L878 garLoopResultBuilder]: At program point L33(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse1 (* main_~a~0 2))) (let ((.cse0 (= main_~t~0 (+ .cse1 1)))) (or (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) .cse0) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse1 (* main_~a~0 main_~a~0) 1) main_~s~0) .cse0)))) [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,084 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,085 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,085 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:18:46,085 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-18 05:18:46,085 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:18:46,085 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:18:46,085 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:18:46,085 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:18:46,085 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:18:46,087 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 05:18:46,088 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 05:18:46,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:18:46 BoogieIcfgContainer [2022-03-18 05:18:46,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 05:18:46,099 INFO L158 Benchmark]: Toolchain (without parser) took 169374.13ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 144.7MB in the beginning and 96.7MB in the end (delta: 48.0MB). Peak memory consumption was 110.4MB. Max. memory is 8.0GB. [2022-03-18 05:18:46,099 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 160.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 05:18:46,100 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.00ms. Allocated memory is still 194.0MB. Free memory was 144.4MB in the beginning and 169.9MB in the end (delta: -25.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-03-18 05:18:46,100 INFO L158 Benchmark]: Boogie Preprocessor took 31.37ms. Allocated memory is still 194.0MB. Free memory was 169.9MB in the beginning and 168.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 05:18:46,100 INFO L158 Benchmark]: RCFGBuilder took 357.08ms. Allocated memory is still 194.0MB. Free memory was 168.3MB in the beginning and 158.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 05:18:46,100 INFO L158 Benchmark]: TraceAbstraction took 168759.13ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 158.1MB in the beginning and 96.7MB in the end (delta: 61.4MB). Peak memory consumption was 124.0MB. Max. memory is 8.0GB. [2022-03-18 05:18:46,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 160.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.00ms. Allocated memory is still 194.0MB. Free memory was 144.4MB in the beginning and 169.9MB in the end (delta: -25.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.37ms. Allocated memory is still 194.0MB. Free memory was 169.9MB in the beginning and 168.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 357.08ms. Allocated memory is still 194.0MB. Free memory was 168.3MB in the beginning and 158.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 168759.13ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 158.1MB in the beginning and 96.7MB in the end (delta: 61.4MB). Peak memory consumption was 124.0MB. 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 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 168.7s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 37.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 56.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 752 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 74 IncrementalHoareTripleChecker+Unchecked, 579 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 400 IncrementalHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 173 mSDtfsCounter, 400 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 99.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, InterpolantAutomatonStates: 42, 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, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 133 PreInvPairs, 191 NumberOfFragments, 293 HoareAnnotationTreeSize, 133 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 1707 FormulaSimplificationTreeSizeReductionInter, 56.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((t == 1 && t * 2 + t * t + 1 == s * 4) && t == a * 2 + 1) || ((s <= n + t && a * 2 + a * a + 1 == s) && t == a * 2 + 1) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && (\old(cond) == 0 || !(cond == 0))) && (!(\old(cond) == 1) || \old(cond) == cond) RESULT: Ultimate proved your program to be correct! [2022-03-18 05:18:46,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...