/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 02:26:47,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 02:26:47,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 02:26:47,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 02:26:47,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 02:26:47,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 02:26:47,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 02:26:47,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 02:26:47,229 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 02:26:47,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 02:26:47,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 02:26:47,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 02:26:47,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 02:26:47,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 02:26:47,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 02:26:47,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 02:26:47,231 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 02:26:47,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 02:26:47,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 02:26:47,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:47,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 02:26:47,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 02:26:47,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 02:26:47,234 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 02:26:47,234 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 02:26:47,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 02:26:47,234 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 02:26:47,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 02:26:47,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 02:26:47,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 02:26:47,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 02:26:47,455 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 02:26:47,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-03-20 02:26:47,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e58c1da1/e2f25f70b3e44682a3119aee282980a8/FLAGa51a7a253 [2022-03-20 02:26:47,889 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 02:26:47,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound20.c [2022-03-20 02:26:47,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e58c1da1/e2f25f70b3e44682a3119aee282980a8/FLAGa51a7a253 [2022-03-20 02:26:48,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e58c1da1/e2f25f70b3e44682a3119aee282980a8 [2022-03-20 02:26:48,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 02:26:48,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 02:26:48,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:48,309 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 02:26:48,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 02:26:48,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af7a3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48, skipping insertion in model container [2022-03-20 02:26:48,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 02:26:48,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 02:26:48,501 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_unwindbound20.c[520,533] [2022-03-20 02:26:48,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:48,527 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 02:26:48,538 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_unwindbound20.c[520,533] [2022-03-20 02:26:48,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 02:26:48,562 INFO L208 MainTranslator]: Completed translation [2022-03-20 02:26:48,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48 WrapperNode [2022-03-20 02:26:48,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 02:26:48,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 02:26:48,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 02:26:48,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 02:26:48,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 02:26:48,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 02:26:48,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 02:26:48,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 02:26:48,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (1/1) ... [2022-03-20 02:26:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 02:26:48,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:48,628 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) [2022-03-20 02:26:48,646 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 [2022-03-20 02:26:48,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 02:26:48,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 02:26:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 02:26:48,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 02:26:48,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 02:26:48,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 02:26:48,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 02:26:48,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 02:26:48,720 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 02:26:48,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 02:26:48,854 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 02:26:48,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 02:26:48,859 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 02:26:48,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:48 BoogieIcfgContainer [2022-03-20 02:26:48,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 02:26:48,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 02:26:48,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 02:26:48,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 02:26:48,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:26:48" (1/3) ... [2022-03-20 02:26:48,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4c428d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:48, skipping insertion in model container [2022-03-20 02:26:48,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:26:48" (2/3) ... [2022-03-20 02:26:48,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4c428d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:26:48, skipping insertion in model container [2022-03-20 02:26:48,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:26:48" (3/3) ... [2022-03-20 02:26:48,880 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound20.c [2022-03-20 02:26:48,883 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 02:26:48,883 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 02:26:48,941 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 02:26:48,946 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 02:26:48,946 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 02:26:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 02:26:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 02:26:48,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:48,965 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:48,967 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2022-03-20 02:26:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208167321] [2022-03-20 02:26:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:49,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208167321] [2022-03-20 02:26:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208167321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:49,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 02:26:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123996595] [2022-03-20 02:26:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 02:26:49,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 02:26:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:49,141 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,191 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-03-20 02:26:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 02:26:49,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 02:26:49,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,202 INFO L225 Difference]: With dead ends: 47 [2022-03-20 02:26:49,203 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 02:26:49,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 02:26:49,207 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 02:26:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 02:26:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-03-20 02:26:49,232 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-03-20 02:26:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,232 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-03-20 02:26:49,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-03-20 02:26:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 02:26:49,233 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:49,233 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:49,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 02:26:49,234 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:49,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:49,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2022-03-20 02:26:49,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713050058] [2022-03-20 02:26:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:49,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713050058] [2022-03-20 02:26:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713050058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:49,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:49,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 02:26:49,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607468667] [2022-03-20 02:26:49,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:49,348 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,439 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-03-20 02:26:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 02:26:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 02:26:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,440 INFO L225 Difference]: With dead ends: 32 [2022-03-20 02:26:49,440 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 02:26:49,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:49,441 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 02:26:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 02:26:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 02:26:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-03-20 02:26:49,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-03-20 02:26:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,447 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-03-20 02:26:49,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-03-20 02:26:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 02:26:49,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:49,448 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:49,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 02:26:49,449 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:49,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2022-03-20 02:26:49,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:49,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123994681] [2022-03-20 02:26:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:49,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 02:26:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:49,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123994681] [2022-03-20 02:26:49,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123994681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:49,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:49,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 02:26:49,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104113891] [2022-03-20 02:26:49,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 02:26:49,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 02:26:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:49,573 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,742 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-03-20 02:26:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 02:26:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 02:26:49,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,746 INFO L225 Difference]: With dead ends: 36 [2022-03-20 02:26:49,746 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 02:26:49,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 02:26:49,754 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 02:26:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-20 02:26:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 02:26:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-20 02:26:49,790 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-03-20 02:26:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,791 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-20 02:26:49,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 02:26:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-20 02:26:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 02:26:49,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:49,792 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:49,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 02:26:49,792 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2022-03-20 02:26:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:49,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391634511] [2022-03-20 02:26:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:49,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:49,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139765206] [2022-03-20 02:26:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:49,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:49,809 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) [2022-03-20 02:26:49,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 02:26:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:49,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 02:26:49,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:26:49,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391634511] [2022-03-20 02:26:49,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139765206] [2022-03-20 02:26:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139765206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:49,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:49,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:26:49,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270622336] [2022-03-20 02:26:49,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:49,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:49,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:49,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:49,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:49,958 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:26:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:49,989 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 02:26:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-20 02:26:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:49,990 INFO L225 Difference]: With dead ends: 40 [2022-03-20 02:26:49,990 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 02:26:49,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 02:26:49,991 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:49,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 02:26:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 02:26:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-03-20 02:26:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 02:26:49,998 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-03-20 02:26:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:49,998 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 02:26:49,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 02:26:49,998 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 02:26:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 02:26:49,999 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:49,999 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:50,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:50,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:50,218 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2022-03-20 02:26:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:50,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787024544] [2022-03-20 02:26:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:50,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:50,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851224828] [2022-03-20 02:26:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:50,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:50,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:50,236 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) [2022-03-20 02:26:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 02:26:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 02:26:50,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 02:26:50,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787024544] [2022-03-20 02:26:50,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851224828] [2022-03-20 02:26:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851224828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 02:26:50,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 02:26:50,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 02:26:50,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103745178] [2022-03-20 02:26:50,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:50,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:50,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 02:26:50,359 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-20 02:26:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:50,394 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-20 02:26:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 [2022-03-20 02:26:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:50,397 INFO L225 Difference]: With dead ends: 44 [2022-03-20 02:26:50,397 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 02:26:50,397 INFO L912 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 [2022-03-20 02:26:50,398 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 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 [2022-03-20 02:26:50,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 02:26:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 02:26:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 02:26:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-20 02:26:50,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-03-20 02:26:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:50,409 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-20 02:26:50,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2022-03-20 02:26:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-20 02:26:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 02:26:50,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:50,411 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:50,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 02:26:50,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:50,628 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2022-03-20 02:26:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:50,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068481822] [2022-03-20 02:26:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:50,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:50,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:50,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821531225] [2022-03-20 02:26:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:50,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:50,648 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) [2022-03-20 02:26:50,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 02:26:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:50,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 02:26:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:50,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068481822] [2022-03-20 02:26:50,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821531225] [2022-03-20 02:26:50,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821531225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:26:50,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:26:50,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 02:26:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451902378] [2022-03-20 02:26:50,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:50,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:26:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:26:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:50,885 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 02:26:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:50,990 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-20 02:26:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 02:26:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-03-20 02:26:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:50,991 INFO L225 Difference]: With dead ends: 80 [2022-03-20 02:26:50,991 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 02:26:50,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:26:50,992 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:50,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 153 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 02:26:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 02:26:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2022-03-20 02:26:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 02:26:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-03-20 02:26:51,002 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 30 [2022-03-20 02:26:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:51,002 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-03-20 02:26:51,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 02:26:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-03-20 02:26:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 02:26:51,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:51,004 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:51,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:51,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:51,225 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:51,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2022-03-20 02:26:51,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:51,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83004740] [2022-03-20 02:26:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:51,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:51,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782430465] [2022-03-20 02:26:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:51,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:51,242 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) [2022-03-20 02:26:51,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 02:26:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 02:26:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 02:26:51,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 02:26:51,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 02:26:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83004740] [2022-03-20 02:26:51,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782430465] [2022-03-20 02:26:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782430465] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 02:26:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 02:26:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 02:26:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592609579] [2022-03-20 02:26:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 02:26:51,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 02:26:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 02:26:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 02:26:51,444 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-03-20 02:26:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:51,490 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2022-03-20 02:26:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 02:26:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 30 [2022-03-20 02:26:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:51,492 INFO L225 Difference]: With dead ends: 81 [2022-03-20 02:26:51,492 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 02:26:51,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:51,494 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:51,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 02:26:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 02:26:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 02:26:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 02:26:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-03-20 02:26:51,504 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 30 [2022-03-20 02:26:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:51,504 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-03-20 02:26:51,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-03-20 02:26:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-03-20 02:26:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 02:26:51,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 02:26:51,505 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:51,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 02:26:51,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:51,726 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 02:26:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 02:26:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2022-03-20 02:26:51,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 02:26:51,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010180939] [2022-03-20 02:26:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 02:26:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 02:26:51,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 02:26:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535270253] [2022-03-20 02:26:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 02:26:51,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:51,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 02:26:51,745 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 02:26:51,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 02:26:51,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 02:26:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 02:26:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 02:26:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 02:26:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 02:26:51,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 02:26:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 02:26:51,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 02:26:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010180939] [2022-03-20 02:26:51,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 02:26:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535270253] [2022-03-20 02:26:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535270253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 02:26:51,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 02:26:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 02:26:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653962218] [2022-03-20 02:26:51,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 02:26:51,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 02:26:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 02:26:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 02:26:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 02:26:51,956 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:26:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 02:26:52,186 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-20 02:26:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 02:26:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-03-20 02:26:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 02:26:52,187 INFO L225 Difference]: With dead ends: 79 [2022-03-20 02:26:52,187 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 02:26:52,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 02:26:52,188 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 02:26:52,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 02:26:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 02:26:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 02:26:52,189 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) [2022-03-20 02:26:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 02:26:52,189 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-03-20 02:26:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 02:26:52,189 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 02:26:52,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-20 02:26:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 02:26:52,190 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 02:26:52,192 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 02:26:52,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 02:26:52,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 02:26:52,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:52,590 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-20 02:26:52,591 INFO L882 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-03-20 02:26:52,591 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,591 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,591 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2022-03-20 02:26:52,591 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-20 02:26:52,591 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2022-03-20 02:26:52,591 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,591 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,591 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-03-20 02:26:52,592 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 2))) (and (= (+ .cse0 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse0 1)))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,592 INFO L878 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,592 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 02:26:52,592 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 02:26:52,592 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2022-03-20 02:26:52,592 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 02:26:52,592 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 02:26:52,592 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-03-20 02:26:52,593 INFO L882 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-03-20 02:26:52,593 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-03-20 02:26:52,593 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-03-20 02:26:52,593 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-03-20 02:26:52,595 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-03-20 02:26:52,596 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 02:26:52,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 02:26:52 BoogieIcfgContainer [2022-03-20 02:26:52,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 02:26:52,606 INFO L158 Benchmark]: Toolchain (without parser) took 4299.02ms. Allocated memory was 222.3MB in the beginning and 267.4MB in the end (delta: 45.1MB). Free memory was 172.9MB in the beginning and 102.2MB in the end (delta: 70.7MB). Peak memory consumption was 116.8MB. Max. memory is 8.0GB. [2022-03-20 02:26:52,606 INFO L158 Benchmark]: CDTParser took 0.95ms. Allocated memory is still 222.3MB. Free memory is still 189.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 02:26:52,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.77ms. Allocated memory is still 222.3MB. Free memory was 172.7MB in the beginning and 197.8MB in the end (delta: -25.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 02:26:52,607 INFO L158 Benchmark]: Boogie Preprocessor took 29.49ms. Allocated memory is still 222.3MB. Free memory was 197.8MB in the beginning and 196.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 02:26:52,607 INFO L158 Benchmark]: RCFGBuilder took 266.25ms. Allocated memory is still 222.3MB. Free memory was 196.3MB in the beginning and 186.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 02:26:52,607 INFO L158 Benchmark]: TraceAbstraction took 3744.41ms. Allocated memory was 222.3MB in the beginning and 267.4MB in the end (delta: 45.1MB). Free memory was 185.9MB in the beginning and 102.2MB in the end (delta: 83.7MB). Peak memory consumption was 129.7MB. Max. memory is 8.0GB. [2022-03-20 02:26:52,608 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95ms. Allocated memory is still 222.3MB. Free memory is still 189.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 254.77ms. Allocated memory is still 222.3MB. Free memory was 172.7MB in the beginning and 197.8MB in the end (delta: -25.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.49ms. Allocated memory is still 222.3MB. Free memory was 197.8MB in the beginning and 196.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 266.25ms. Allocated memory is still 222.3MB. Free memory was 196.3MB in the beginning and 186.5MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 3744.41ms. Allocated memory was 222.3MB in the beginning and 267.4MB in the end (delta: 45.1MB). Free memory was 185.9MB in the beginning and 102.2MB in the end (delta: 83.7MB). Peak memory consumption was 129.7MB. 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, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 121 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 107 mSDsluCounter, 688 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 464 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 340 IncrementalHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 224 mSDtfsCounter, 340 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 255 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 49, 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, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 47 PreInvPairs, 76 NumberOfFragments, 203 HoareAnnotationTreeSize, 47 FomulaSimplifications, 36 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 879 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 253 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 7 NumberOfNonLiveVariables, 508 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 149/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (a * 2 + a * a + 1 == s && t == a * 2 + 1) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [2022-03-20 02:26:52,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...