/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/hard2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:35:45,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:35:45,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:35:45,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 03:35:45,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:35:45,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:35:45,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:35:45,745 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 03:35:45,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:35:45,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:35:45,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:35:45,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:35:45,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:35:45,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:35:45,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:35:45,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:35:45,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:35:45,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:35:45,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:35:45,758 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:35:45,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:35:45,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:35:45,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:35:45,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:35:45,977 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:35:45,977 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:35:45,978 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c [2022-03-18 03:35:46,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dcf1ad12/56b4d640856c4262ab0ab89854a5f85f/FLAGa2f4307fb [2022-03-18 03:35:46,370 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:35:46,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound1.c [2022-03-18 03:35:46,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dcf1ad12/56b4d640856c4262ab0ab89854a5f85f/FLAGa2f4307fb [2022-03-18 03:35:46,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dcf1ad12/56b4d640856c4262ab0ab89854a5f85f [2022-03-18 03:35:46,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:35:46,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:35:46,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:35:46,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:35:46,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:35:46,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216e8eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46, skipping insertion in model container [2022-03-18 03:35:46,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:35:46,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:35:46,535 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/hard2_unwindbound1.c[526,539] [2022-03-18 03:35:46,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:35:46,551 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:35:46,558 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/hard2_unwindbound1.c[526,539] [2022-03-18 03:35:46,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:35:46,569 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:35:46,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46 WrapperNode [2022-03-18 03:35:46,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:35:46,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:35:46,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:35:46,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:35:46,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:35:46,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:35:46,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:35:46,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:35:46,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (1/1) ... [2022-03-18 03:35:46,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:35:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:35:46,629 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 03:35:46,631 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 03:35:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:35:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:35:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:35:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:35:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:35:46,656 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:35:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:35:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:35:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:35:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:35:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:35:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:35:46,703 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:35:46,704 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:35:46,834 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:35:46,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:35:46,838 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 03:35:46,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:35:46 BoogieIcfgContainer [2022-03-18 03:35:46,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:35:46,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:35:46,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:35:46,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:35:46,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:35:46" (1/3) ... [2022-03-18 03:35:46,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136e76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:35:46, skipping insertion in model container [2022-03-18 03:35:46,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:35:46" (2/3) ... [2022-03-18 03:35:46,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136e76b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:35:46, skipping insertion in model container [2022-03-18 03:35:46,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:35:46" (3/3) ... [2022-03-18 03:35:46,848 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound1.c [2022-03-18 03:35:46,851 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:35:46,851 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:35:46,885 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:35:46,896 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 03:35:46,897 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:35:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 03:35:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:35:46,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:46,912 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:46,913 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-18 03:35:46,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:46,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249100931] [2022-03-18 03:35:46,929 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-18 03:35:46,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:46,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636099927] [2022-03-18 03:35:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:46,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:35:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:35:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:47,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636099927] [2022-03-18 03:35:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636099927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:35:47,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249100931] [2022-03-18 03:35:47,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249100931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:35:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096422510] [2022-03-18 03:35:47,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:47,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:35:47,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:35:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:35:47,070 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2022-03-18 03:35:47,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:47,137 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-18 03:35:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:35:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2022-03-18 03:35:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:47,143 INFO L225 Difference]: With dead ends: 57 [2022-03-18 03:35:47,143 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 03:35:47,146 INFO L911 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 [2022-03-18 03:35:47,148 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:47,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:35:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 03:35:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 03:35:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:35:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-18 03:35:47,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-18 03:35:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:47,181 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-18 03:35:47,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2022-03-18 03:35:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-18 03:35:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:35:47,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:47,182 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:47,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:35:47,183 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-18 03:35:47,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574533568] [2022-03-18 03:35:47,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-18 03:35:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441621206] [2022-03-18 03:35:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:35:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:35:47,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441621206] [2022-03-18 03:35:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441621206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:35:47,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:47,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574533568] [2022-03-18 03:35:47,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574533568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:35:47,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406967073] [2022-03-18 03:35:47,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:47,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:35:47,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:35:47,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:35:47,269 INFO L87 Difference]: Start difference. First operand 26 states and 36 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) [2022-03-18 03:35:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:47,409 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-18 03:35:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:35:47,411 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 [2022-03-18 03:35:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:47,412 INFO L225 Difference]: With dead ends: 41 [2022-03-18 03:35:47,412 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 03:35:47,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:35:47,413 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:47,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:35:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 03:35:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-18 03:35:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:35:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 03:35:47,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-18 03:35:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:47,421 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 03:35:47,421 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) [2022-03-18 03:35:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 03:35:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 03:35:47,422 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:47,422 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:47,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 03:35:47,422 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-18 03:35:47,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056794971] [2022-03-18 03:35:47,431 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:47,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-18 03:35:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:47,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408404567] [2022-03-18 03:35:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:47,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:35:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:35:47,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408404567] [2022-03-18 03:35:47,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408404567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:35:47,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:47,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056794971] [2022-03-18 03:35:47,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056794971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:35:47,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597627826] [2022-03-18 03:35:47,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:47,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:35:47,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:35:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:35:47,511 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-18 03:35:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:47,572 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-18 03:35:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 03:35:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-18 03:35:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:47,575 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:35:47,575 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 03:35:47,576 INFO L911 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 [2022-03-18 03:35:47,578 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:47,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:35:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 03:35:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 03:35:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:35:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 03:35:47,585 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-18 03:35:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:47,585 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 03:35:47,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-18 03:35:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 03:35:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 03:35:47,586 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:47,586 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:47,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 03:35:47,586 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-18 03:35:47,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218148122] [2022-03-18 03:35:47,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-18 03:35:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192056846] [2022-03-18 03:35:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:35:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 03:35:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:35:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192056846] [2022-03-18 03:35:47,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192056846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:35:47,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218148122] [2022-03-18 03:35:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218148122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:47,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:47,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:35:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369960410] [2022-03-18 03:35:47,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:47,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:35:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:35:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:35:47,651 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:35:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:47,756 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-18 03:35:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:35:47,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 03:35:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:47,759 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:35:47,759 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 03:35:47,761 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:35:47,764 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:47,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:35:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 03:35:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-18 03:35:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:35:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-18 03:35:47,780 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-18 03:35:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:47,781 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-18 03:35:47,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:35:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-18 03:35:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 03:35:47,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:47,781 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:47,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 03:35:47,782 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-18 03:35:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:47,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282546776] [2022-03-18 03:35:47,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-18 03:35:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:47,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656917359] [2022-03-18 03:35:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:47,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:35:47,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311824899] [2022-03-18 03:35:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:35:47,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:35:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:35:47,794 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 03:35:47,795 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 03:35:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:35:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:35:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 03:35:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:35:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:35:48,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:35:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656917359] [2022-03-18 03:35:48,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:35:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311824899] [2022-03-18 03:35:48,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311824899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:48,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:48,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:35:48,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:48,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282546776] [2022-03-18 03:35:48,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282546776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:48,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:48,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:35:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136152194] [2022-03-18 03:35:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:48,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:35:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:35:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:35:48,041 INFO L87 Difference]: Start difference. First operand 36 states and 44 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) [2022-03-18 03:35:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:48,072 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-18 03:35:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:35:48,072 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 [2022-03-18 03:35:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:48,073 INFO L225 Difference]: With dead ends: 65 [2022-03-18 03:35:48,073 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 03:35:48,074 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:35:48,074 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:48,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:35:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 03:35:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 03:35:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:35:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 03:35:48,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-18 03:35:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:48,085 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 03:35:48,085 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) [2022-03-18 03:35:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 03:35:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 03:35:48,086 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:48,086 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:48,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 03:35:48,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:35:48,304 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-18 03:35:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:48,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538123721] [2022-03-18 03:35:48,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:35:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-18 03:35:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:48,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093945018] [2022-03-18 03:35:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:48,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:48,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:35:48,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676818380] [2022-03-18 03:35:48,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:35:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:35:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:35:48,313 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 03:35:48,314 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 03:35:48,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:35:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:35:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:35:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:35:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:35:48,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:35:48,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093945018] [2022-03-18 03:35:48,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:35:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676818380] [2022-03-18 03:35:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676818380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:48,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:48,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:35:48,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:48,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538123721] [2022-03-18 03:35:48,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538123721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:48,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:48,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:35:48,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779428166] [2022-03-18 03:35:48,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:48,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:35:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:35:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:35:48,450 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:35:48,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:48,487 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-03-18 03:35:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:35:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 03:35:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:48,488 INFO L225 Difference]: With dead ends: 64 [2022-03-18 03:35:48,488 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 03:35:48,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 03:35:48,489 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:48,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:35:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 03:35:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 03:35:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:35:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-03-18 03:35:48,496 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 30 [2022-03-18 03:35:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:48,496 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-03-18 03:35:48,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:35:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-03-18 03:35:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 03:35:48,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:48,497 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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 03:35:48,516 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 03:35:48,714 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,SelfDestructingSolverStorable5 [2022-03-18 03:35:48,715 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-18 03:35:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814000111] [2022-03-18 03:35:49,206 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:35:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash -861149586, now seen corresponding path program 1 times [2022-03-18 03:35:49,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:35:49,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915915247] [2022-03-18 03:35:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:49,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:35:49,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:35:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695738860] [2022-03-18 03:35:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:35:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:35:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:35:49,232 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 03:35:49,233 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 03:35:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:35:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:35:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:35:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:35:49,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:35:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:35:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915915247] [2022-03-18 03:35:49,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:35:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695738860] [2022-03-18 03:35:49,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695738860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:49,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:49,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:35:50,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:35:50,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814000111] [2022-03-18 03:35:50,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814000111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:35:50,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:35:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:35:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936590394] [2022-03-18 03:35:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:35:50,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:35:50,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:50,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:35:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:35:50,990 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:35:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:35:54,079 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-18 03:35:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 03:35:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-03-18 03:35:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:35:54,081 INFO L225 Difference]: With dead ends: 90 [2022-03-18 03:35:54,081 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 03:35:54,082 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2022-03-18 03:35:54,082 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 03:35:54,083 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 271 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 03:35:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 03:35:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 03:35:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:35:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-18 03:35:54,089 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-18 03:35:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:35:54,090 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-18 03:35:54,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:35:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-18 03:35:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 03:35:54,090 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:35:54,090 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:35:54,111 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 03:35:54,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:35:54,296 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:35:54,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:35:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-18 03:35:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:35:54,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250139912] [2022-03-18 03:37:09,068 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:37:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash 449890654, now seen corresponding path program 1 times [2022-03-18 03:37:09,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:37:09,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504062017] [2022-03-18 03:37:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:09,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:37:09,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:37:09,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749622780] [2022-03-18 03:37:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:37:09,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:37:09,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 03:37:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:37:09,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:37:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:37:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:37:09,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:37:09,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:37:09,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504062017] [2022-03-18 03:37:09,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:37:09,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749622780] [2022-03-18 03:37:09,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749622780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:09,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:09,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:37:09,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:37:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250139912] [2022-03-18 03:37:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250139912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:09,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:09,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:37:09,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054182006] [2022-03-18 03:37:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:37:09,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:37:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:37:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:37:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:37:09,481 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:37:09,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:37:09,702 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-03-18 03:37:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 03:37:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-18 03:37:09,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:37:09,704 INFO L225 Difference]: With dead ends: 105 [2022-03-18 03:37:09,704 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 03:37:09,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-18 03:37:09,705 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 03:37:09,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 274 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 03:37:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 03:37:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 03:37:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:37:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-18 03:37:09,717 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-18 03:37:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:37:09,720 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-18 03:37:09,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:37:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-18 03:37:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 03:37:09,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:37:09,723 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:37:09,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 03:37:09,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:09,926 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:37:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:37:09,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2022-03-18 03:37:09,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:37:09,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [397911316] [2022-03-18 03:37:14,547 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:37:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 237971182, now seen corresponding path program 1 times [2022-03-18 03:37:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:37:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012682350] [2022-03-18 03:37:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:37:14,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:37:14,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5335758] [2022-03-18 03:37:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:14,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:14,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:37:14,554 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) [2022-03-18 03:37:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 03:37:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:37:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:37:14,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:37:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:37:14,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:37:14,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:37:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012682350] [2022-03-18 03:37:14,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:37:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5335758] [2022-03-18 03:37:14,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5335758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:14,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:14,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:37:15,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:37:15,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [397911316] [2022-03-18 03:37:15,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [397911316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:15,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:15,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 03:37:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858066071] [2022-03-18 03:37:15,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:37:15,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 03:37:15,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:37:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 03:37:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:37:15,092 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 03:37:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:37:15,569 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2022-03-18 03:37:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 03:37:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2022-03-18 03:37:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:37:15,570 INFO L225 Difference]: With dead ends: 105 [2022-03-18 03:37:15,570 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 03:37:15,571 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-03-18 03:37:15,572 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 03:37:15,572 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 03:37:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 03:37:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-03-18 03:37:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:37:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-03-18 03:37:15,581 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 55 [2022-03-18 03:37:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:37:15,581 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-03-18 03:37:15,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 03:37:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-03-18 03:37:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 03:37:15,582 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:37:15,583 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:37:15,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 03:37:15,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:15,800 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:37:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:37:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1879054090, now seen corresponding path program 2 times [2022-03-18 03:37:15,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:37:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541480080] [2022-03-18 03:37:52,104 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:37:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash -473974562, now seen corresponding path program 1 times [2022-03-18 03:37:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:37:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443715931] [2022-03-18 03:37:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:37:52,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:37:52,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110003893] [2022-03-18 03:37:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:37:52,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:37:52,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:37:52,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 03:37:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:37:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:37:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:37:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:37:52,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:37:52,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:37:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443715931] [2022-03-18 03:37:52,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:37:52,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110003893] [2022-03-18 03:37:52,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110003893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:52,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:52,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:37:53,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:37:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541480080] [2022-03-18 03:37:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541480080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:37:53,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:37:53,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 03:37:53,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41682489] [2022-03-18 03:37:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:37:53,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 03:37:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:37:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 03:37:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:37:53,924 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:37:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:37:54,079 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-03-18 03:37:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 03:37:54,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-03-18 03:37:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:37:54,079 INFO L225 Difference]: With dead ends: 77 [2022-03-18 03:37:54,079 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 03:37:54,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-18 03:37:54,081 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:37:54,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:37:54,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 03:37:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 03:37:54,081 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 03:37:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 03:37:54,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-03-18 03:37:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:37:54,082 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 03:37:54,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:37:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 03:37:54,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 03:37:54,084 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 03:37:54,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 03:37:54,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:37:54,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 03:37:57,807 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-18 03:37:57,807 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-18 03:37:57,807 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-18 03:37:57,807 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:37:57,807 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-18 03:37:57,808 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:37:57,808 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:37:57,808 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,808 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 61) the Hoare annotation is: true [2022-03-18 03:37:57,808 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (not (<= |old(~counter~0)| 0)) [2022-03-18 03:37:57,808 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 23 61) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,808 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,808 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 61) the Hoare annotation is: true [2022-03-18 03:37:57,808 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,809 INFO L878 garLoopResultBuilder]: At program point L44-2(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,809 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:37:57,809 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= ~counter~0 (+ |main_#t~post5| 1)) (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:37:57,809 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 42) the Hoare annotation is: (let ((.cse1 (= main_~A~0 main_~r~0)) (.cse2 (= main_~q~0 0))) (or (not (<= |old(~counter~0)| 0)) (let ((.cse0 (* main_~B~0 (div main_~p~0 2)))) (and (<= 1 main_~B~0) (= (* 2 .cse0) main_~d~0) .cse1 (<= ~counter~0 1) .cse2 (= (mod main_~p~0 2) 0) (<= .cse0 main_~r~0))) (and (= ~counter~0 |old(~counter~0)|) .cse1 .cse2 (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)))) [2022-03-18 03:37:57,809 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 61) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,809 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:37:57,810 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|)) [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:37:57,810 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 03:37:57,810 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:37:57,811 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 03:37:57,811 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 03:37:57,811 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:37:57,811 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:37:57,811 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 03:37:57,811 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:37:57,811 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:37:57,811 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:37:57,813 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 03:37:57,814 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 03:37:57,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 03:37:57 BoogieIcfgContainer [2022-03-18 03:37:57,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 03:37:57,831 INFO L158 Benchmark]: Toolchain (without parser) took 131446.85ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 121.1MB in the beginning and 79.0MB in the end (delta: 42.2MB). Peak memory consumption was 77.1MB. Max. memory is 8.0GB. [2022-03-18 03:37:57,831 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 172.0MB. Free memory was 137.8MB in the beginning and 137.6MB in the end (delta: 136.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 03:37:57,832 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.06ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 120.9MB in the beginning and 183.0MB in the end (delta: -62.1MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2022-03-18 03:37:57,832 INFO L158 Benchmark]: Boogie Preprocessor took 29.80ms. Allocated memory is still 206.6MB. Free memory was 183.0MB in the beginning and 181.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 03:37:57,832 INFO L158 Benchmark]: RCFGBuilder took 238.97ms. Allocated memory is still 206.6MB. Free memory was 181.9MB in the beginning and 170.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 03:37:57,832 INFO L158 Benchmark]: TraceAbstraction took 130989.73ms. Allocated memory is still 206.6MB. Free memory was 170.4MB in the beginning and 79.0MB in the end (delta: 91.4MB). Peak memory consumption was 91.9MB. Max. memory is 8.0GB. [2022-03-18 03:37:57,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 172.0MB. Free memory was 137.8MB in the beginning and 137.6MB in the end (delta: 136.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.06ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 120.9MB in the beginning and 183.0MB in the end (delta: -62.1MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.80ms. Allocated memory is still 206.6MB. Free memory was 183.0MB in the beginning and 181.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.97ms. Allocated memory is still 206.6MB. Free memory was 181.9MB in the beginning and 170.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 130989.73ms. Allocated memory is still 206.6MB. Free memory was 170.4MB in the beginning and 79.0MB in the end (delta: 91.4MB). Peak memory consumption was 91.9MB. 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: 17]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130.9s, OverallIterations: 10, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 213 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 188 mSDsluCounter, 1410 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1088 mSDsCounter, 142 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1403 IncrementalHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 142 mSolverCounterUnsat, 322 mSDtfsCounter, 1403 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 344 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=9, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 22 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 385 PreInvPairs, 460 NumberOfFragments, 565 HoareAnnotationTreeSize, 385 FomulaSimplifications, 308 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 736 FormulaSimplificationTreeSizeReductionInter, 3.4s 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: (!(\old(counter) <= 0) || ((((((1 <= B && 2 * (B * (p / 2)) == d) && A == r) && counter <= 1) && q == 0) && p % 2 == 0) && B * (p / 2) <= r)) || (((((counter == \old(counter) && A == r) && q == 0) && B == 1) && B == d) && p == 1) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (((!(1 <= \old(cond)) || 1 <= cond) && (((!(\old(cond) == 1) || !(q == 0)) || \old(cond) == cond) || !(counter <= 1))) && (((!(\old(cond) == 1) || \old(cond) == cond) || !(A == r)) || !(counter <= 1))) && (((((!(\old(cond) == 1) || \old(cond) == cond) || !(B == d)) || !(counter <= 1)) || !(p == 1)) || !(B == 1)) RESULT: Ultimate proved your program to be correct! [2022-03-18 03:37:57,865 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...