/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 04:16:31,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 04:16:31,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 04:16:31,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 04:16:31,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 04:16:31,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 04:16:31,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 04:16:31,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 04:16:31,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 04:16:31,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 04:16:31,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 04:16:31,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 04:16:31,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 04:16:31,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 04:16:31,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 04:16:31,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 04:16:31,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 04:16:31,783 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 04:16:31,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 04:16:31,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:16:31,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 04:16:31,784 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 04:16:31,785 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 04:16:31,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 04:16:31,785 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 04:16:31,785 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 04:16:31,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 04:16:31,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 04:16:31,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 04:16:31,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 04:16:32,002 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 04:16:32,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c [2022-03-18 04:16:32,063 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e91d603d/f16d3afdb9eb4db49ef2a0dfd6d16426/FLAG86061ddc8 [2022-03-18 04:16:32,442 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 04:16:32,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c [2022-03-18 04:16:32,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e91d603d/f16d3afdb9eb4db49ef2a0dfd6d16426/FLAG86061ddc8 [2022-03-18 04:16:32,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e91d603d/f16d3afdb9eb4db49ef2a0dfd6d16426 [2022-03-18 04:16:32,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 04:16:32,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 04:16:32,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 04:16:32,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 04:16:32,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 04:16:32,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215646d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32, skipping insertion in model container [2022-03-18 04:16:32,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 04:16:32,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 04:16:32,602 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c[537,550] [2022-03-18 04:16:32,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:16:32,647 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 04:16:32,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c[537,550] [2022-03-18 04:16:32,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:16:32,669 INFO L208 MainTranslator]: Completed translation [2022-03-18 04:16:32,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32 WrapperNode [2022-03-18 04:16:32,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 04:16:32,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 04:16:32,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 04:16:32,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 04:16:32,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 04:16:32,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 04:16:32,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 04:16:32,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 04:16:32,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (1/1) ... [2022-03-18 04:16:32,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:16:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:32,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 04:16:32,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 04:16:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 04:16:32,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 04:16:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 04:16:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 04:16:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 04:16:32,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 04:16:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 04:16:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 04:16:32,801 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 04:16:32,802 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 04:16:32,883 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 04:16:32,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 04:16:32,888 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 04:16:32,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:16:32 BoogieIcfgContainer [2022-03-18 04:16:32,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 04:16:32,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 04:16:32,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 04:16:32,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 04:16:32,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:16:32" (1/3) ... [2022-03-18 04:16:32,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591f2bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:16:32, skipping insertion in model container [2022-03-18 04:16:32,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:16:32" (2/3) ... [2022-03-18 04:16:32,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591f2bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:16:32, skipping insertion in model container [2022-03-18 04:16:32,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:16:32" (3/3) ... [2022-03-18 04:16:32,916 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound1.c [2022-03-18 04:16:32,920 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 04:16:32,920 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 04:16:32,959 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 04:16:32,964 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 04:16:32,965 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 04:16:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:16:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 04:16:32,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:32,986 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:32,987 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-03-18 04:16:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:33,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858570419] [2022-03-18 04:16:33,019 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:33,019 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 2 times [2022-03-18 04:16:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146857149] [2022-03-18 04:16:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:33,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:33,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 04:16:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 04:16:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:33,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 04:16:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 04:16:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:16:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:33,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146857149] [2022-03-18 04:16:33,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146857149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:33,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:33,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:16:33,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858570419] [2022-03-18 04:16:33,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858570419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:33,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:33,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:16:33,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884157362] [2022-03-18 04:16:33,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:33,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 04:16:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:33,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 04:16:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:16:33,278 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:16:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:33,369 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-18 04:16:33,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 04:16:33,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-18 04:16:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:33,378 INFO L225 Difference]: With dead ends: 57 [2022-03-18 04:16:33,378 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 04:16:33,388 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:16:33,393 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:33,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 04:16:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 04:16:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 04:16:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-18 04:16:33,438 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-18 04:16:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:33,439 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-18 04:16:33,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 04:16:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-18 04:16:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 04:16:33,443 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:33,444 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:33,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 04:16:33,444 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:33,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-03-18 04:16:33,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:33,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [230633416] [2022-03-18 04:16:33,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 2 times [2022-03-18 04:16:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:33,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193485021] [2022-03-18 04:16:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:33,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:33,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035767850] [2022-03-18 04:16:33,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:33,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:33,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:16:33,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 04:16:33,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 04:16:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:33,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 04:16:33,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:33,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:16:33,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193485021] [2022-03-18 04:16:33,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035767850] [2022-03-18 04:16:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035767850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:33,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:16:33,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [230633416] [2022-03-18 04:16:33,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [230633416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:33,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:33,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:16:33,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676651281] [2022-03-18 04:16:33,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:33,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:16:33,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:16:33,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 04:16:33,738 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:16:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:33,793 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-18 04:16:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 04:16:33,793 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), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-18 04:16:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:33,795 INFO L225 Difference]: With dead ends: 39 [2022-03-18 04:16:33,795 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 04:16:33,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 04:16:33,796 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:33,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 04:16:33,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-18 04:16:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:16:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-18 04:16:33,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-18 04:16:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:33,807 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-18 04:16:33,807 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), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:16:33,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-18 04:16:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 04:16:33,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:33,808 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:33,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 04:16:34,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:34,020 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-03-18 04:16:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:34,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243651871] [2022-03-18 04:16:34,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 2 times [2022-03-18 04:16:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:34,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200439446] [2022-03-18 04:16:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:34,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:34,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616214749] [2022-03-18 04:16:34,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:34,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:34,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:34,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:16:34,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 04:16:34,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:16:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 04:16:34,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:16:34,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:16:34,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:34,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200439446] [2022-03-18 04:16:34,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:34,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616214749] [2022-03-18 04:16:34,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616214749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:34,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:34,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 04:16:34,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:34,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243651871] [2022-03-18 04:16:34,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243651871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:34,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:34,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 04:16:34,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738671388] [2022-03-18 04:16:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:34,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 04:16:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 04:16:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 04:16:34,198 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:34,249 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-18 04:16:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 04:16:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-18 04:16:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:34,251 INFO L225 Difference]: With dead ends: 43 [2022-03-18 04:16:34,251 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 04:16:34,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 04:16:34,253 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:34,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:16:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 04:16:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-18 04:16:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:16:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-18 04:16:34,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-18 04:16:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:34,262 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-18 04:16:34,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 04:16:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-18 04:16:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 04:16:34,264 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:16:34,264 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:16:34,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 04:16:34,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 04:16:34,480 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:16:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:16:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-03-18 04:16:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [80253858] [2022-03-18 04:16:34,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:16:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 2 times [2022-03-18 04:16:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:16:34,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209484445] [2022-03-18 04:16:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:16:34,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:16:34,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:16:34,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515616011] [2022-03-18 04:16:34,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:16:34,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:34,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:16:34,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:16:34,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 04:16:34,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:16:34,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:16:34,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 04:16:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:16:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 04:16:34,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:16:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 04:16:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:16:41,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209484445] [2022-03-18 04:16:41,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:16:41,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515616011] [2022-03-18 04:16:41,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515616011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:16:41,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:16:41,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-18 04:16:41,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:16:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [80253858] [2022-03-18 04:16:41,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [80253858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:16:41,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:16:41,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 04:16:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947850444] [2022-03-18 04:16:41,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:16:41,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 04:16:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:16:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 04:16:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-18 04:16:41,861 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 04:16:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:16:42,047 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-18 04:16:42,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 04:16:42,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2022-03-18 04:16:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:16:42,048 INFO L225 Difference]: With dead ends: 44 [2022-03-18 04:16:42,049 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 04:16:42,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-18 04:16:42,056 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:16:42,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:16:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 04:16:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 04:16:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 04:16:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 04:16:42,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-03-18 04:16:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:16:42,059 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 04:16:42,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 04:16:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 04:16:42,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 04:16:42,062 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 04:16:42,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 04:16:42,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:16:42,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 04:16:42,535 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2022-03-18 04:16:42,535 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 6) no Hoare annotation was computed. [2022-03-18 04:16:42,535 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 6) no Hoare annotation was computed. [2022-03-18 04:16:42,535 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-18 04:16:42,535 INFO L878 garLoopResultBuilder]: At program point L10(line 10) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-18 04:16:42,535 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 04:16:42,535 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 1) (<= 0 main_~b~0)) [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-18 04:16:42,536 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (<= main_~b~0 1))) (or (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) .cse0 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (and (= main_~a~0 main_~z~0) .cse0 (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (and (= main_~a~0 main_~z~0) (<= main_~b~0 1) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)) [2022-03-18 04:16:42,537 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (<= main_~b~0 1) (<= 1 main_~b~0)) [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L39(lines 39 42) the Hoare annotation is: (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 1) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0)) [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L39-2(lines 39 42) the Hoare annotation is: (and (= main_~b~0 (+ main_~y~0 1)) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (<= main_~b~0 1) (<= 1 main_~b~0) (= main_~a~0 main_~x~0)) [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= main_~b~0 1))) (or (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) .cse0 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (and (= main_~a~0 main_~z~0) .cse0 (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-18 04:16:42,537 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 45) the Hoare annotation is: (let ((.cse0 (<= main_~b~0 1))) (or (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) .cse0 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0)) (and (= main_~a~0 main_~z~0) .cse0 (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-18 04:16:42,538 INFO L878 garLoopResultBuilder]: At program point L14(lines 14 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 04:16:42,539 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:16:42,539 INFO L878 garLoopResultBuilder]: At program point L13-2(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:16:42,539 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-18 04:16:42,539 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 04:16:42,542 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2] [2022-03-18 04:16:42,543 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 04:16:42,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:16:42 BoogieIcfgContainer [2022-03-18 04:16:42,557 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 04:16:42,557 INFO L158 Benchmark]: Toolchain (without parser) took 10093.90ms. Allocated memory was 180.4MB in the beginning and 228.6MB in the end (delta: 48.2MB). Free memory was 131.5MB in the beginning and 100.8MB in the end (delta: 30.6MB). Peak memory consumption was 79.4MB. Max. memory is 8.0GB. [2022-03-18 04:16:42,557 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 147.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 04:16:42,558 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.88ms. Allocated memory was 180.4MB in the beginning and 228.6MB in the end (delta: 48.2MB). Free memory was 131.2MB in the beginning and 206.1MB in the end (delta: -74.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-03-18 04:16:42,558 INFO L158 Benchmark]: Boogie Preprocessor took 22.12ms. Allocated memory is still 228.6MB. Free memory was 206.1MB in the beginning and 204.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 04:16:42,558 INFO L158 Benchmark]: RCFGBuilder took 196.79ms. Allocated memory is still 228.6MB. Free memory was 204.5MB in the beginning and 194.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 04:16:42,559 INFO L158 Benchmark]: TraceAbstraction took 9657.34ms. Allocated memory is still 228.6MB. Free memory was 193.5MB in the beginning and 100.8MB in the end (delta: 92.7MB). Peak memory consumption was 93.2MB. Max. memory is 8.0GB. [2022-03-18 04:16:42,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 147.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.88ms. Allocated memory was 180.4MB in the beginning and 228.6MB in the end (delta: 48.2MB). Free memory was 131.2MB in the beginning and 206.1MB in the end (delta: -74.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.12ms. Allocated memory is still 228.6MB. Free memory was 206.1MB in the beginning and 204.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 196.79ms. Allocated memory is still 228.6MB. Free memory was 204.5MB in the beginning and 194.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 9657.34ms. Allocated memory is still 228.6MB. Free memory was 193.5MB in the beginning and 100.8MB in the end (delta: 92.7MB). Peak memory consumption was 93.2MB. 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: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 392 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 294 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 234 IncrementalHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 98 mSDtfsCounter, 234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 90 PreInvPairs, 126 NumberOfFragments, 290 HoareAnnotationTreeSize, 90 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 32 FomulaSimplificationsInter, 109 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((z + y * x == b * a && b <= 1) && b == y) && 1 <= y) && a == x) || ((((a == z && b <= 1) && a * 2 == x) && 1 <= b) && (-1 + b) / 2 == y) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-18 04:16:42,578 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...