/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:30:31,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:30:32,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:30:32,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 23:30:32,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:30:32,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:30:32,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:30:32,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 23:30:32,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:30:32,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:30:32,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:30:32,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:30:32,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:30:32,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:30:32,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:30:32,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:30:32,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:30:32,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:30:32,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:30:32,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:30:32,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:30:32,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:30:32,088 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:30:32,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:30:32,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:30:32,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:30:32,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:30:32,281 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:30:32,283 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:30:32,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2022-04-06 23:30:32,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72aa44d7/13a9e063e65f4855bf1c4afecc292a9a/FLAG25b3c79f7 [2022-04-06 23:30:32,678 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:30:32,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2022-04-06 23:30:32,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72aa44d7/13a9e063e65f4855bf1c4afecc292a9a/FLAG25b3c79f7 [2022-04-06 23:30:32,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e72aa44d7/13a9e063e65f4855bf1c4afecc292a9a [2022-04-06 23:30:32,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:30:32,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:30:32,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:30:32,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:30:32,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:30:32,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38138bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32, skipping insertion in model container [2022-04-06 23:30:32,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:30:32,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:30:32,841 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_valuebound5.c[526,539] [2022-04-06 23:30:32,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:30:32,854 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:30:32,861 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_valuebound5.c[526,539] [2022-04-06 23:30:32,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:30:32,872 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:30:32,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32 WrapperNode [2022-04-06 23:30:32,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:30:32,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:30:32,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:30:32,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:30:32,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:30:32,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:30:32,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:30:32,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:30:32,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (1/1) ... [2022-04-06 23:30:32,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:30:32,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:32,926 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) [2022-04-06 23:30:32,927 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 [2022-04-06 23:30:32,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:30:32,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:30:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:30:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:30:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:30:32,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:30:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:30:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:30:32,994 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:30:32,995 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:30:33,068 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:30:33,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:30:33,072 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:30:33,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:30:33 BoogieIcfgContainer [2022-04-06 23:30:33,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:30:33,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:30:33,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:30:33,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:30:33,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:30:32" (1/3) ... [2022-04-06 23:30:33,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa56e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:30:33, skipping insertion in model container [2022-04-06 23:30:33,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:30:32" (2/3) ... [2022-04-06 23:30:33,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa56e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:30:33, skipping insertion in model container [2022-04-06 23:30:33,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:30:33" (3/3) ... [2022-04-06 23:30:33,080 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2022-04-06 23:30:33,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:30:33,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:30:33,108 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:30:33,113 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 [2022-04-06 23:30:33,113 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:30:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:30:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:30:33,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:33,126 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:33,127 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-04-06 23:30:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217731560] [2022-04-06 23:30:33,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:30:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-04-06 23:30:33,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:33,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430277110] [2022-04-06 23:30:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:30:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:30:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:30:33,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430277110] [2022-04-06 23:30:33,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430277110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:30:33,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:33,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217731560] [2022-04-06 23:30:33,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217731560] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:30:33,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101791851] [2022-04-06 23:30:33,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:33,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:30:33,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:30:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:30:33,318 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:30:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:33,373 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-04-06 23:30:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:30:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:30:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:33,380 INFO L225 Difference]: With dead ends: 61 [2022-04-06 23:30:33,380 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 23:30:33,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:30:33,384 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:33,385 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:30:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 23:30:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 23:30:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:30:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-04-06 23:30:33,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-04-06 23:30:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:33,412 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-04-06 23:30:33,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:30:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-04-06 23:30:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:30:33,412 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:33,413 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:33,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:30:33,413 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:33,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-04-06 23:30:33,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842459247] [2022-04-06 23:30:33,415 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:30:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-04-06 23:30:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632392117] [2022-04-06 23:30:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:30:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:30:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:30:33,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:33,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632392117] [2022-04-06 23:30:33,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632392117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:33,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:33,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842459247] [2022-04-06 23:30:33,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842459247] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928583140] [2022-04-06 23:30:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:33,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:30:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:30:33,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:30:33,496 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:30:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:33,650 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 23:30:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:30:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:30:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:33,654 INFO L225 Difference]: With dead ends: 43 [2022-04-06 23:30:33,655 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 23:30:33,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:30:33,656 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:33,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 23:30:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 23:30:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:30:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 23:30:33,686 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-04-06 23:30:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:33,686 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 23:30:33,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:30:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 23:30:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 23:30:33,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:33,687 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:33,688 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:30:33,688 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:33,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-04-06 23:30:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286204334] [2022-04-06 23:30:33,689 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:30:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-04-06 23:30:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:33,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256658742] [2022-04-06 23:30:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:33,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:30:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:30:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 23:30:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:30:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:30:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256658742] [2022-04-06 23:30:33,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256658742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:33,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:33,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286204334] [2022-04-06 23:30:33,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286204334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:33,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:33,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894998406] [2022-04-06 23:30:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:33,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:30:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:30:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:30:33,796 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:30:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:33,913 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 23:30:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:30:33,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 [2022-04-06 23:30:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:33,916 INFO L225 Difference]: With dead ends: 47 [2022-04-06 23:30:33,916 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 23:30:33,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:30:33,920 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:33,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 23:30:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-04-06 23:30:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:30:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-04-06 23:30:33,941 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-04-06 23:30:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:33,942 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-04-06 23:30:33,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:30:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-04-06 23:30:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 23:30:33,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:33,943 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:33,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 23:30:33,945 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-04-06 23:30:33,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:33,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [904043100] [2022-04-06 23:30:33,947 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:30:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-04-06 23:30:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150911134] [2022-04-06 23:30:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:33,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:33,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064527983] [2022-04-06 23:30:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:33,975 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) [2022-04-06 23:30:33,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 23:30:34,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:30:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 23:30:34,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:30:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150911134] [2022-04-06 23:30:34,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064527983] [2022-04-06 23:30:34,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064527983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:34,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:34,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:30:34,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:34,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [904043100] [2022-04-06 23:30:34,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [904043100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:34,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:34,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:30:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960489420] [2022-04-06 23:30:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:34,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:30:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:30:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:30:34,168 INFO L87 Difference]: Start difference. First operand 38 states and 44 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) [2022-04-06 23:30:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:34,216 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 23:30:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:30:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 23:30:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:34,218 INFO L225 Difference]: With dead ends: 66 [2022-04-06 23:30:34,218 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 23:30:34,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:30:34,219 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:34,219 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:30:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 23:30:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 23:30:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:30:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-04-06 23:30:34,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-04-06 23:30:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:34,227 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-04-06 23:30:34,227 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) [2022-04-06 23:30:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-04-06 23:30:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 23:30:34,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:34,228 INFO L499 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, 1, 1, 1, 1] [2022-04-06 23:30:34,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 23:30:34,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:34,438 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:34,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:34,439 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-04-06 23:30:34,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:34,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458264817] [2022-04-06 23:30:34,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:30:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-04-06 23:30:34,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:34,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594799999] [2022-04-06 23:30:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:34,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:34,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:34,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503590824] [2022-04-06 23:30:34,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:34,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:34,448 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) [2022-04-06 23:30:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 23:30:34,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:30:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:30:34,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:30:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594799999] [2022-04-06 23:30:34,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503590824] [2022-04-06 23:30:34,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503590824] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:34,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:34,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:30:34,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458264817] [2022-04-06 23:30:34,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458264817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:34,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:34,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:30:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128114813] [2022-04-06 23:30:34,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:34,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:30:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:30:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:30:34,576 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:30:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:34,618 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-04-06 23:30:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:30:34,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 23:30:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:34,621 INFO L225 Difference]: With dead ends: 65 [2022-04-06 23:30:34,621 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 23:30:34,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:30:34,622 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:34,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:30:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 23:30:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 23:30:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 23:30:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-04-06 23:30:34,643 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-04-06 23:30:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:34,643 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-04-06 23:30:34,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:30:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-04-06 23:30:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 23:30:34,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:34,645 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:34,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 23:30:34,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:34,863 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-04-06 23:30:34,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450294876] [2022-04-06 23:30:34,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:34,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-04-06 23:30:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:34,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949234995] [2022-04-06 23:30:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:34,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562143396] [2022-04-06 23:30:34,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:34,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:34,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:34,903 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) [2022-04-06 23:30:34,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 23:30:34,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:30:34,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:30:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 23:30:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949234995] [2022-04-06 23:30:35,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562143396] [2022-04-06 23:30:35,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562143396] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:30:35,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:30:35,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 23:30:35,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450294876] [2022-04-06 23:30:35,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450294876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:35,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:35,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:30:35,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199894530] [2022-04-06 23:30:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:35,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:30:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:30:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:30:35,164 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:30:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:35,263 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 23:30:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:30:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-04-06 23:30:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:35,268 INFO L225 Difference]: With dead ends: 69 [2022-04-06 23:30:35,268 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 23:30:35,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:30:35,269 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:35,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 23:30:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 23:30:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 23:30:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 23:30:35,276 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-04-06 23:30:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:35,276 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 23:30:35,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:30:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 23:30:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 23:30:35,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:35,278 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:35,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 23:30:35,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:35,491 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-04-06 23:30:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:35,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113567952] [2022-04-06 23:30:35,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:35,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:35,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-04-06 23:30:35,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981030796] [2022-04-06 23:30:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:35,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:35,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:35,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791081684] [2022-04-06 23:30:35,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:35,503 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) [2022-04-06 23:30:35,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 23:30:35,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:35,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:30:35,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:30:35,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:30:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981030796] [2022-04-06 23:30:36,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791081684] [2022-04-06 23:30:36,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791081684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:30:36,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:30:36,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 23:30:36,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:36,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113567952] [2022-04-06 23:30:36,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113567952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:36,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:36,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:30:36,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473885594] [2022-04-06 23:30:36,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:36,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:30:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:30:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:30:36,503 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:30:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:36,639 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-04-06 23:30:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:30:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-04-06 23:30:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:36,641 INFO L225 Difference]: With dead ends: 130 [2022-04-06 23:30:36,641 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 23:30:36,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:30:36,642 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:36,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 23:30:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 23:30:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:30:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-04-06 23:30:36,652 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-04-06 23:30:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:36,652 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-04-06 23:30:36,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:30:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-04-06 23:30:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 23:30:36,653 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:36,653 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:36,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 23:30:36,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:36,867 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-04-06 23:30:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1719540310] [2022-04-06 23:30:36,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:36,871 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-04-06 23:30:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:36,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564224634] [2022-04-06 23:30:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:36,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:36,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916451176] [2022-04-06 23:30:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:30:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:36,878 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) [2022-04-06 23:30:36,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 23:30:36,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:30:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:30:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:30:37,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:30:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564224634] [2022-04-06 23:30:37,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916451176] [2022-04-06 23:30:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916451176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:30:37,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:30:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 23:30:37,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:37,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1719540310] [2022-04-06 23:30:37,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1719540310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:37,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:37,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888780482] [2022-04-06 23:30:37,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:37,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:30:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:30:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:30:37,739 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:30:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:37,817 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-04-06 23:30:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:30:37,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-04-06 23:30:37,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:37,818 INFO L225 Difference]: With dead ends: 126 [2022-04-06 23:30:37,818 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 23:30:37,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:30:37,819 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:37,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 23:30:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 23:30:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:30:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-04-06 23:30:37,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-04-06 23:30:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:37,828 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-04-06 23:30:37,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:30:37,829 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-04-06 23:30:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 23:30:37,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:37,830 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:37,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 23:30:38,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:38,048 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:38,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-04-06 23:30:38,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:38,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [666536007] [2022-04-06 23:30:38,051 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:38,051 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-04-06 23:30:38,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93538049] [2022-04-06 23:30:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:38,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:38,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671108447] [2022-04-06 23:30:38,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:38,059 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) [2022-04-06 23:30:38,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 23:30:38,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 23:30:38,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 23:30:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 23:30:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93538049] [2022-04-06 23:30:38,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671108447] [2022-04-06 23:30:38,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671108447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:30:38,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:30:38,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 23:30:38,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:38,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [666536007] [2022-04-06 23:30:38,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [666536007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:38,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:38,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:30:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966988517] [2022-04-06 23:30:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:38,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:30:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:30:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:30:38,653 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:30:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:38,836 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-04-06 23:30:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:30:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 23:30:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:38,837 INFO L225 Difference]: With dead ends: 109 [2022-04-06 23:30:38,837 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 23:30:38,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:30:38,838 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:38,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:30:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 23:30:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 23:30:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:30:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-04-06 23:30:38,846 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-04-06 23:30:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:38,846 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-04-06 23:30:38,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:30:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-04-06 23:30:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 23:30:38,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:38,847 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:38,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 23:30:39,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:39,060 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-04-06 23:30:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909742367] [2022-04-06 23:30:39,063 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:39,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-04-06 23:30:39,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:39,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653549941] [2022-04-06 23:30:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:39,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:39,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:39,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38865220] [2022-04-06 23:30:39,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:30:39,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:39,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:39,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:30:39,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 23:30:39,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 23:30:39,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 23:30:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:39,364 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:30:39,375 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:30:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 23:30:39,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:58,095 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse4 (= (mod c_main_~p~0 2) 0)) (.cse8 (< c_main_~p~0 0)) (.cse9 (div c_main_~p~0 2))) (let ((.cse7 (< c_main_~d~0 0)) (.cse6 (= (mod c_main_~d~0 2) 0)) (.cse3 (* (+ c_main_~q~0 .cse9 1) c_main_~B~0)) (.cse5 (not .cse8)) (.cse0 (* (- 1) (div c_main_~d~0 2))) (.cse1 (* (+ c_main_~q~0 .cse9) c_main_~B~0)) (.cse2 (and (not .cse4) .cse8))) (and (or (and (or (= c_main_~A~0 (+ (- 1) c_main_~r~0 .cse0 .cse1)) .cse2) (or (= c_main_~A~0 (+ (- 1) .cse3 c_main_~r~0 .cse0)) .cse4 .cse5)) .cse6 (not .cse7)) (or (and .cse7 (not .cse6)) (and (or (= (+ .cse3 c_main_~r~0 .cse0) c_main_~A~0) .cse4 .cse5) (or (= c_main_~A~0 (+ c_main_~r~0 .cse0 .cse1)) .cse2)))))) (not (= (* c_main_~p~0 c_main_~B~0) c_main_~d~0))) is different from true [2022-04-06 23:31:30,997 WARN L232 SmtUtils]: Spent 7.31s on a formula simplification that was a NOOP. DAG size: 4 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 23:31:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 195 trivial. 8 not checked. [2022-04-06 23:31:55,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653549941] [2022-04-06 23:31:55,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38865220] [2022-04-06 23:31:55,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38865220] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:55,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:55,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 23:31:55,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909742367] [2022-04-06 23:31:55,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909742367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:55,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:55,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:31:55,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386589123] [2022-04-06 23:31:55,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:55,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:31:55,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:31:55,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=162, Unknown=1, NotChecked=26, Total=240 [2022-04-06 23:31:55,357 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:55,527 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-04-06 23:31:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:31:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-04-06 23:31:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:55,528 INFO L225 Difference]: With dead ends: 106 [2022-04-06 23:31:55,528 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 23:31:55,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=211, Unknown=1, NotChecked=30, Total=306 [2022-04-06 23:31:55,529 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:55,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 23:31:55,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-04-06 23:31:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:31:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 23:31:55,538 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-04-06 23:31:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:55,538 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 23:31:55,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 23:31:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 23:31:55,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:55,539 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:55,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 23:31:55,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:55,757 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-04-06 23:31:55,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:55,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423386704] [2022-04-06 23:31:55,759 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:55,759 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-04-06 23:31:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:55,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663663003] [2022-04-06 23:31:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:55,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:55,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370181537] [2022-04-06 23:31:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:31:55,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:55,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:31:55,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 23:31:55,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:31:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 23:31:55,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 23:31:56,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 23:31:56,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663663003] [2022-04-06 23:31:56,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370181537] [2022-04-06 23:31:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370181537] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:56,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:56,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 23:31:56,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:56,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423386704] [2022-04-06 23:31:56,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423386704] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:56,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:56,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:31:56,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795204700] [2022-04-06 23:31:56,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:56,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:31:56,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:31:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:31:56,908 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 23:31:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:57,044 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2022-04-06 23:31:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:31:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 86 [2022-04-06 23:31:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:57,047 INFO L225 Difference]: With dead ends: 170 [2022-04-06 23:31:57,047 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 23:31:57,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:31:57,050 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:57,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 23:31:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 23:31:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.141025641025641) internal successors, (89), 82 states have internal predecessors, (89), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:31:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-04-06 23:31:57,068 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 86 [2022-04-06 23:31:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:57,069 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-04-06 23:31:57,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 23:31:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-04-06 23:31:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 23:31:57,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:57,071 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:57,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 23:31:57,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 23:31:57,288 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-04-06 23:31:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93364509] [2022-04-06 23:31:57,290 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:57,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:57,291 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-04-06 23:31:57,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:57,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974849404] [2022-04-06 23:31:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:57,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:57,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858071348] [2022-04-06 23:31:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:31:57,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:57,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:57,298 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:31:57,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 23:31:57,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:31:57,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 23:31:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:31:57,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 19 refuted. 5 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:32:19,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:19,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974849404] [2022-04-06 23:32:19,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:19,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858071348] [2022-04-06 23:32:19,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858071348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:19,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:19,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 23:32:19,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:19,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93364509] [2022-04-06 23:32:19,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93364509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:19,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:19,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:32:19,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28235885] [2022-04-06 23:32:19,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:19,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:32:19,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:19,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:32:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-04-06 23:32:19,833 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:32:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:20,088 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-04-06 23:32:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:32:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2022-04-06 23:32:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:20,090 INFO L225 Difference]: With dead ends: 164 [2022-04-06 23:32:20,090 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 23:32:20,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=64, Invalid=207, Unknown=1, NotChecked=0, Total=272 [2022-04-06 23:32:20,090 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:20,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 266 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:32:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 23:32:20,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-04-06 23:32:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 100 states have internal predecessors, (106), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:32:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-04-06 23:32:20,103 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 94 [2022-04-06 23:32:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:20,104 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-04-06 23:32:20,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:32:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-04-06 23:32:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 23:32:20,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:20,105 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:20,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 23:32:20,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:20,319 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 11 times [2022-04-06 23:32:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925575989] [2022-04-06 23:32:20,323 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:20,323 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 12 times [2022-04-06 23:32:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:20,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360144940] [2022-04-06 23:32:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:20,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:20,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59322116] [2022-04-06 23:32:20,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:32:20,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:20,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:20,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 23:32:20,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 23:32:20,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 23:32:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 23:32:20,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 23:32:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360144940] [2022-04-06 23:32:21,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59322116] [2022-04-06 23:32:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59322116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:21,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:21,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 23:32:21,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925575989] [2022-04-06 23:32:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925575989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:21,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:21,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:32:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225587014] [2022-04-06 23:32:21,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:21,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:32:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:32:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:32:21,299 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:32:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:21,422 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-04-06 23:32:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:32:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-04-06 23:32:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:21,423 INFO L225 Difference]: With dead ends: 164 [2022-04-06 23:32:21,423 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 23:32:21,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:32:21,424 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:21,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 120 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:32:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 23:32:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 23:32:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 106 states have internal predecessors, (112), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:32:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2022-04-06 23:32:21,437 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 103 [2022-04-06 23:32:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:21,437 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2022-04-06 23:32:21,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:32:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2022-04-06 23:32:21,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:32:21,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:21,439 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:21,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 23:32:21,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 23:32:21,659 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 3 times [2022-04-06 23:32:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:21,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588870336] [2022-04-06 23:32:21,671 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:21,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 4 times [2022-04-06 23:32:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:21,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190096990] [2022-04-06 23:32:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:21,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:21,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214623143] [2022-04-06 23:32:21,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:32:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:21,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:21,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:21,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 23:32:21,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:32:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 23:32:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:32:22,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:32:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190096990] [2022-04-06 23:32:24,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214623143] [2022-04-06 23:32:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214623143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:24,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:24,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-04-06 23:32:24,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:24,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588870336] [2022-04-06 23:32:24,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588870336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:24,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:24,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:32:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604242848] [2022-04-06 23:32:24,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:24,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:32:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:32:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:32:24,852 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 23:32:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:25,053 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2022-04-06 23:32:25,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:32:25,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2022-04-06 23:32:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:25,055 INFO L225 Difference]: With dead ends: 171 [2022-04-06 23:32:25,055 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 23:32:25,055 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:32:25,056 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:25,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 276 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:32:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 23:32:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 23:32:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 33 states have call successors, (33), 21 states have call predecessors, (33), 20 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 23:32:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2022-04-06 23:32:25,066 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 105 [2022-04-06 23:32:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:25,066 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2022-04-06 23:32:25,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 23:32:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2022-04-06 23:32:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:32:25,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:25,067 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:25,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 23:32:25,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 23:32:25,275 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 1 times [2022-04-06 23:32:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [992849732] [2022-04-06 23:32:25,278 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:25,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 2 times [2022-04-06 23:32:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:25,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025832928] [2022-04-06 23:32:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:25,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161073954] [2022-04-06 23:32:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:32:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:25,292 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 23:32:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:32:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 23:32:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 23:32:25,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:32:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025832928] [2022-04-06 23:32:25,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:25,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161073954] [2022-04-06 23:32:25,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161073954] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:25,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:25,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:32:25,567 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [992849732] [2022-04-06 23:32:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [992849732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:25,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:25,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:32:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369926212] [2022-04-06 23:32:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:25,567 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:32:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:32:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:32:25,568 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:32:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:25,718 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2022-04-06 23:32:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:32:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 105 [2022-04-06 23:32:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:25,719 INFO L225 Difference]: With dead ends: 195 [2022-04-06 23:32:25,719 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 23:32:25,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:32:25,720 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:25,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:32:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 23:32:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2022-04-06 23:32:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:32:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-04-06 23:32:25,729 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 105 [2022-04-06 23:32:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:25,729 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-04-06 23:32:25,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:32:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-04-06 23:32:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 23:32:25,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:25,730 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:25,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 23:32:25,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 23:32:25,944 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 5 times [2022-04-06 23:32:25,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:25,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811349076] [2022-04-06 23:32:25,946 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:25,946 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 6 times [2022-04-06 23:32:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:25,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633364672] [2022-04-06 23:32:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:25,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:25,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728278379] [2022-04-06 23:32:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:32:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:25,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:25,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 23:32:26,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:32:26,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:26,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 23:32:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:32:26,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-04-06 23:32:26,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:26,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633364672] [2022-04-06 23:32:26,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:26,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728278379] [2022-04-06 23:32:26,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728278379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:26,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:26,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-04-06 23:32:26,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:26,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811349076] [2022-04-06 23:32:26,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811349076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:26,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:26,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:32:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777206680] [2022-04-06 23:32:26,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:26,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:32:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:32:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:32:26,466 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:32:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:26,525 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-04-06 23:32:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:32:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 109 [2022-04-06 23:32:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:26,527 INFO L225 Difference]: With dead ends: 128 [2022-04-06 23:32:26,527 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 23:32:26,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:32:26,529 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:26,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:32:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 23:32:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 23:32:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 75 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 23:32:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-04-06 23:32:26,547 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 109 [2022-04-06 23:32:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:26,547 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-04-06 23:32:26,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:32:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-04-06 23:32:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 23:32:26,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:26,548 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:26,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 23:32:26,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 23:32:26,763 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 13 times [2022-04-06 23:32:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141882529] [2022-04-06 23:32:26,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:26,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 14 times [2022-04-06 23:32:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588561142] [2022-04-06 23:32:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:26,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266434207] [2022-04-06 23:32:26,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:32:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:26,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 23:32:26,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:32:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 23:32:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:32:27,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:32:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588561142] [2022-04-06 23:32:27,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266434207] [2022-04-06 23:32:27,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266434207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:27,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:27,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-04-06 23:32:27,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:27,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141882529] [2022-04-06 23:32:27,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141882529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:27,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:27,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:32:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798991916] [2022-04-06 23:32:27,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:27,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:32:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:32:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-04-06 23:32:27,688 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:32:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:27,984 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-04-06 23:32:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:32:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2022-04-06 23:32:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:27,985 INFO L225 Difference]: With dead ends: 192 [2022-04-06 23:32:27,985 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 23:32:27,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-04-06 23:32:27,986 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 28 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:27,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 345 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:32:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 23:32:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2022-04-06 23:32:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 73 states have internal predecessors, (77), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:32:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2022-04-06 23:32:27,997 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 111 [2022-04-06 23:32:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:27,997 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2022-04-06 23:32:27,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:32:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2022-04-06 23:32:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 23:32:27,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:27,998 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:28,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 23:32:28,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:28,215 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 1 times [2022-04-06 23:32:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598632324] [2022-04-06 23:32:28,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:28,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 2 times [2022-04-06 23:32:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104372108] [2022-04-06 23:32:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:28,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553109310] [2022-04-06 23:32:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:32:28,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:28,224 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:32:28,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 23:32:28,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:32:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 23:32:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:32:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:33:00,477 WARN L232 SmtUtils]: Spent 7.60s on a formula simplification that was a NOOP. DAG size: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:34:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:34:30,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:34:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104372108] [2022-04-06 23:34:30,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:34:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553109310] [2022-04-06 23:34:30,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553109310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:34:30,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:34:30,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 23:34:30,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:34:30,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598632324] [2022-04-06 23:34:30,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598632324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:34:30,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:34:30,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:34:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61941811] [2022-04-06 23:34:30,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:34:30,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:34:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:34:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=282, Unknown=4, NotChecked=0, Total=380 [2022-04-06 23:34:30,608 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:34:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:34:31,088 INFO L93 Difference]: Finished difference Result 159 states and 183 transitions. [2022-04-06 23:34:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:34:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-04-06 23:34:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:34:31,089 INFO L225 Difference]: With dead ends: 159 [2022-04-06 23:34:31,089 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 23:34:31,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 226 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=98, Invalid=318, Unknown=4, NotChecked=0, Total=420 [2022-04-06 23:34:31,090 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:34:31,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 302 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:34:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 23:34:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-04-06 23:34:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 80 states have internal predecessors, (84), 27 states have call successors, (27), 19 states have call predecessors, (27), 18 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:34:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2022-04-06 23:34:31,101 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 124 [2022-04-06 23:34:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:34:31,101 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2022-04-06 23:34:31,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:34:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2022-04-06 23:34:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 23:34:31,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:34:31,102 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:34:31,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 23:34:31,310 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 23:34:31,310 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:34:31,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:34:31,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 3 times [2022-04-06 23:34:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:31,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950409534] [2022-04-06 23:34:31,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:34:31,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:34:31,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 4 times [2022-04-06 23:34:31,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:34:31,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274488743] [2022-04-06 23:34:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:34:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:34:31,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:34:31,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350318870] [2022-04-06 23:34:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:34:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:34:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:34:31,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:34:31,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 23:34:31,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:34:31,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:34:31,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 23:34:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:34:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 23:34:31,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:34:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:34:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274488743] [2022-04-06 23:34:32,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:34:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350318870] [2022-04-06 23:34:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350318870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:34:32,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:34:32,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 23:34:32,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:34:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950409534] [2022-04-06 23:34:32,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950409534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:34:32,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:34:32,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:34:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058658099] [2022-04-06 23:34:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:34:32,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:34:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:34:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:34:32,418 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:34:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:34:32,747 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-04-06 23:34:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:34:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-04-06 23:34:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:34:32,748 INFO L225 Difference]: With dead ends: 149 [2022-04-06 23:34:32,748 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 23:34:32,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:34:32,749 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:34:32,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 314 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:34:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 23:34:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-06 23:34:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.0) internal successors, (77), 77 states have internal predecessors, (77), 25 states have call successors, (25), 20 states have call predecessors, (25), 18 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:34:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-04-06 23:34:32,759 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 135 [2022-04-06 23:34:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:34:32,760 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-04-06 23:34:32,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:34:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-04-06 23:34:32,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 23:34:32,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:34:32,761 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:34:32,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 23:34:32,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:34:32,974 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:34:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:34:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash -777337911, now seen corresponding path program 1 times [2022-04-06 23:34:32,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074220751] [2022-04-06 23:34:32,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:34:32,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:34:32,977 INFO L85 PathProgramCache]: Analyzing trace with hash -777337911, now seen corresponding path program 2 times [2022-04-06 23:34:32,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:34:32,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856745487] [2022-04-06 23:34:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:34:32,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:34:32,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:34:32,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471010023] [2022-04-06 23:34:32,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:34:32,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:34:32,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:34:32,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:34:32,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 23:34:33,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:34:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:34:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 23:34:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:34:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:34:33,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:34:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:34:34,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:34:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856745487] [2022-04-06 23:34:34,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:34:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471010023] [2022-04-06 23:34:34,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471010023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:34:34,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:34:34,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-04-06 23:34:34,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:34:34,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074220751] [2022-04-06 23:34:34,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074220751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:34:34,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:34:34,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:34:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576848789] [2022-04-06 23:34:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:34:34,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:34:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:34:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:34:34,195 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 23:34:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:34:34,406 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-04-06 23:34:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:34:34,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 140 [2022-04-06 23:34:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:34:34,406 INFO L225 Difference]: With dead ends: 121 [2022-04-06 23:34:34,406 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 23:34:34,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:34:34,407 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 11 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:34:34,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 331 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:34:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 23:34:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 23:34:34,408 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) [2022-04-06 23:34:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 23:34:34,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 140 [2022-04-06 23:34:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:34:34,408 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 23:34:34,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 23:34:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 23:34:34,408 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 23:34:34,410 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 23:34:34,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 23:34:34,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:34:34,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 23:34:39,498 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 23:34:39,499 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 23:34:39,499 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 23:34:39,499 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-04-06 23:34:39,499 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 61) the Hoare annotation is: true [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (let ((.cse15 (* (div (+ (* (- 1) main_~B~0 main_~q~0) main_~A~0 (* (- 1) main_~r~0)) main_~B~0) 2))) (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse3 (= main_~B~0 main_~d~0)) (.cse12 (* main_~B~0 2)) (.cse4 (= main_~p~0 1)) (.cse7 (<= 0 .cse15)) (.cse8 (= (* main_~B~0 main_~p~0) main_~d~0)) (.cse9 (<= 0 main_~r~0)) (.cse10 (< .cse15 2)) (.cse14 (= main_~d~0 2)) (.cse2 (= main_~B~0 1)) (.cse11 (= main_~q~0 4)) (.cse6 (<= main_~A~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (let ((.cse5 (* main_~B~0 4))) (and .cse0 (<= .cse5 main_~r~0) .cse1 .cse2 (= main_~d~0 .cse5) (= main_~p~0 4) .cse6)) (and .cse7 .cse8 .cse9 .cse10 .cse2 .cse11 (< main_~r~0 .cse12) .cse3) (let ((.cse13 (* (div (+ (* (- 1) main_~B~0 main_~p~0) main_~d~0) main_~B~0) 2))) (and .cse0 (< main_~d~0 (+ main_~r~0 1)) (< .cse13 2) .cse14 (<= 0 .cse13) .cse1 .cse2)) (and (= main_~q~0 2) .cse2 .cse3 (= main_~A~0 (+ .cse12 main_~r~0)) .cse4) (and .cse7 .cse8 .cse9 .cse10 .cse14 .cse2 .cse11 .cse6)))) [2022-04-06 23:34:39,499 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (let ((.cse17 (+ main_~d~0 main_~r~0)) (.cse18 (* (div (+ (* (- 1) main_~B~0 main_~q~0) main_~A~0 (* (- 1) main_~r~0)) main_~B~0) 2))) (let ((.cse6 (= main_~p~0 2)) (.cse3 (= main_~B~0 main_~d~0)) (.cse5 (* main_~B~0 2)) (.cse4 (= main_~p~0 1)) (.cse7 (<= 0 main_~r~0)) (.cse8 (= main_~d~0 2)) (.cse13 (= main_~q~0 4)) (.cse10 (<= 0 .cse18)) (.cse11 (= (* main_~B~0 main_~p~0) main_~d~0)) (.cse12 (< .cse18 2)) (.cse9 (= .cse17 main_~A~0)) (.cse2 (= main_~B~0 1)) (.cse16 (= main_~p~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse15 (* main_~B~0 4)) (.cse1 (= main_~q~0 0)) (.cse14 (<= main_~A~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= .cse5 main_~d~0) .cse6 .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4) (and (= (+ main_~p~0 4) main_~q~0) .cse7 (not (<= 6 main_~A~0)) (= main_~A~0 (+ main_~d~0 main_~r~0 4)) .cse2 .cse3 .cse4) (and (= main_~q~0 main_~p~0) .cse6 .cse8 .cse9 .cse2) (and (= main_~q~0 3) (= main_~A~0 (+ main_~r~0 (* main_~B~0 3))) (= main_~A~0 (+ main_~d~0 main_~r~0 2)) .cse3 .cse4) (and .cse10 .cse11 (<= 0 main_~A~0) .cse12 .cse2 .cse13 .cse3 .cse14) (and (= main_~q~0 2) .cse2 .cse3 (= main_~A~0 (+ .cse5 main_~r~0)) .cse4) (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse15) .cse16) (and .cse10 .cse11 .cse7 .cse12 .cse8 .cse2 .cse13 .cse14) (and .cse10 .cse11 (<= .cse15 .cse17) .cse12 .cse9 .cse2 .cse16 .cse14) (and .cse0 (= main_~p~0 8) (<= .cse15 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse14)))) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (let ((.cse15 (* (- 1) main_~r~0))) (let ((.cse18 (+ main_~d~0 main_~r~0)) (.cse19 (* (div (+ (* (- 1) main_~B~0 main_~q~0) main_~A~0 .cse15) main_~B~0) 2))) (let ((.cse6 (= main_~p~0 2)) (.cse3 (= main_~B~0 main_~d~0)) (.cse5 (* main_~B~0 2)) (.cse4 (= main_~p~0 1)) (.cse7 (<= 0 main_~r~0)) (.cse8 (= main_~d~0 2)) (.cse13 (= main_~q~0 4)) (.cse10 (<= 0 .cse19)) (.cse11 (= (* main_~B~0 main_~p~0) main_~d~0)) (.cse12 (< .cse19 2)) (.cse9 (= .cse18 main_~A~0)) (.cse2 (= main_~B~0 1)) (.cse17 (= main_~p~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse16 (* main_~B~0 4)) (.cse1 (= main_~q~0 0)) (.cse14 (<= main_~A~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= .cse5 main_~d~0) .cse6 .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4) (and (= (+ main_~p~0 4) main_~q~0) .cse7 (not (<= 6 main_~A~0)) (= main_~A~0 (+ main_~d~0 main_~r~0 4)) .cse2 .cse3 .cse4) (and (= main_~q~0 main_~p~0) .cse6 .cse8 .cse9 .cse2) (and .cse10 .cse11 (<= 0 main_~A~0) .cse12 .cse2 .cse13 .cse3 .cse14) (and (= (+ main_~p~0 2) main_~q~0) (= (div (+ (* (- 1) main_~d~0) main_~A~0 .cse15) 2) main_~d~0) .cse2 (= main_~A~0 (+ main_~d~0 main_~r~0 2)) .cse4) (and (= main_~q~0 2) .cse2 .cse3 (= main_~A~0 (+ .cse5 main_~r~0)) .cse4) (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse16) .cse17) (and .cse10 .cse11 .cse7 .cse12 .cse8 .cse2 .cse13 .cse14) (and .cse10 .cse11 (<= .cse16 .cse18) .cse12 .cse9 .cse2 .cse17 .cse14) (and .cse0 (= main_~p~0 8) (<= .cse16 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse14))))) [2022-04-06 23:34:39,500 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 61) the Hoare annotation is: true [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~B~0 1)) (.cse1 (= main_~B~0 main_~d~0)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (= (+ main_~d~0 main_~r~0) main_~A~0) .cse0 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse1 .cse2) (and (= (+ main_~r~0 (* main_~B~0 4)) main_~A~0) (= (* main_~B~0 main_~p~0) main_~d~0) (<= 0 main_~A~0) .cse0 (= main_~q~0 4) .cse1 (<= main_~A~0 5)) (and (= (+ main_~p~0 4) main_~q~0) (<= 0 main_~r~0) (not (<= 6 main_~A~0)) (= main_~A~0 (+ main_~d~0 main_~r~0 4)) .cse0 .cse1 .cse2) (and (= (+ main_~p~0 2) main_~q~0) (= (div (+ (* (- 1) main_~d~0) main_~A~0 (* (- 1) main_~r~0)) 2) main_~d~0) .cse0 (= main_~A~0 (+ main_~d~0 main_~r~0 2)) .cse2) (and (= main_~q~0 2) .cse0 .cse1 (= main_~A~0 (+ (* main_~B~0 2) main_~r~0)) .cse2))) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse3 (* main_~B~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse5 (<= 0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse4 (<= main_~A~0 5))) (or (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse3) (= main_~p~0 4) .cse4) (and .cse0 .cse5 .cse1 .cse2 (= main_~B~0 main_~d~0) .cse4 (= main_~p~0 1)) (and .cse0 (= main_~p~0 8) (<= .cse3 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse4) (and .cse0 .cse5 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse4))) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse3 (* main_~B~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse5 (<= 0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse4 (<= main_~A~0 5))) (or (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse3) (= main_~p~0 4) .cse4) (and .cse0 .cse5 .cse1 .cse2 (= main_~B~0 main_~d~0) .cse4 (= main_~p~0 1)) (and .cse0 (= main_~p~0 8) (<= .cse3 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse4) (and .cse0 .cse5 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse4))) [2022-04-06 23:34:39,500 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2022-04-06 23:34:39,500 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-04-06 23:34:39,500 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 5)) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse17 (+ main_~d~0 main_~r~0)) (.cse18 (* (div (+ (* (- 1) main_~B~0 main_~q~0) main_~A~0 (* (- 1) main_~r~0)) main_~B~0) 2))) (let ((.cse6 (= main_~p~0 2)) (.cse3 (= main_~B~0 main_~d~0)) (.cse5 (* main_~B~0 2)) (.cse4 (= main_~p~0 1)) (.cse7 (<= 0 main_~r~0)) (.cse8 (= main_~d~0 2)) (.cse13 (= main_~q~0 4)) (.cse10 (<= 0 .cse18)) (.cse11 (= (* main_~B~0 main_~p~0) main_~d~0)) (.cse12 (< .cse18 2)) (.cse9 (= .cse17 main_~A~0)) (.cse2 (= main_~B~0 1)) (.cse16 (= main_~p~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse15 (* main_~B~0 4)) (.cse1 (= main_~q~0 0)) (.cse14 (<= main_~A~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= .cse5 main_~d~0) .cse6 .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4) (and (= (+ main_~p~0 4) main_~q~0) .cse7 (not (<= 6 main_~A~0)) (= main_~A~0 (+ main_~d~0 main_~r~0 4)) .cse2 .cse3 .cse4) (and (= main_~q~0 main_~p~0) .cse6 .cse8 .cse9 .cse2) (and (= main_~q~0 3) (= main_~A~0 (+ main_~r~0 (* main_~B~0 3))) (= main_~A~0 (+ main_~d~0 main_~r~0 2)) .cse3 .cse4) (and .cse10 .cse11 (<= 0 main_~A~0) .cse12 .cse2 .cse13 .cse3 .cse14) (and (= main_~q~0 2) .cse2 .cse3 (= main_~A~0 (+ .cse5 main_~r~0)) .cse4) (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse15) .cse16) (and .cse10 .cse11 .cse7 .cse12 .cse8 .cse2 .cse13 .cse14) (and .cse10 .cse11 (<= .cse15 .cse17) .cse12 .cse9 .cse2 .cse16 .cse14) (and .cse0 (= main_~p~0 8) (<= .cse15 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse14)))) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse15 (* (- 1) main_~r~0))) (let ((.cse18 (+ main_~d~0 main_~r~0)) (.cse19 (* (div (+ (* (- 1) main_~B~0 main_~q~0) main_~A~0 .cse15) main_~B~0) 2))) (let ((.cse6 (= main_~p~0 2)) (.cse3 (= main_~B~0 main_~d~0)) (.cse5 (* main_~B~0 2)) (.cse4 (= main_~p~0 1)) (.cse7 (<= 0 main_~r~0)) (.cse8 (= main_~d~0 2)) (.cse13 (= main_~q~0 4)) (.cse10 (<= 0 .cse19)) (.cse11 (= (* main_~B~0 main_~p~0) main_~d~0)) (.cse12 (< .cse19 2)) (.cse9 (= .cse18 main_~A~0)) (.cse2 (= main_~B~0 1)) (.cse17 (= main_~p~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse16 (* main_~B~0 4)) (.cse1 (= main_~q~0 0)) (.cse14 (<= main_~A~0 5))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= .cse5 main_~d~0) .cse6 .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4) (and (= (+ main_~p~0 4) main_~q~0) .cse7 (not (<= 6 main_~A~0)) (= main_~A~0 (+ main_~d~0 main_~r~0 4)) .cse2 .cse3 .cse4) (and (= main_~q~0 main_~p~0) .cse6 .cse8 .cse9 .cse2) (and .cse10 .cse11 (<= 0 main_~A~0) .cse12 .cse2 .cse13 .cse3 .cse14) (and (= (+ main_~p~0 2) main_~q~0) (= (div (+ (* (- 1) main_~d~0) main_~A~0 .cse15) 2) main_~d~0) .cse2 (= main_~A~0 (+ main_~d~0 main_~r~0 2)) .cse4) (and (= main_~q~0 2) .cse2 .cse3 (= main_~A~0 (+ .cse5 main_~r~0)) .cse4) (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse16) .cse17) (and .cse10 .cse11 .cse7 .cse12 .cse8 .cse2 .cse13 .cse14) (and .cse10 .cse11 (<= .cse16 .cse18) .cse12 .cse9 .cse2 .cse17 .cse14) (and .cse0 (= main_~p~0 8) (<= .cse16 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse14))))) [2022-04-06 23:34:39,500 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (let ((.cse3 (* main_~B~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse5 (<= 0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse4 (<= main_~A~0 5))) (or (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse3) (= main_~p~0 4) .cse4) (and .cse0 .cse5 .cse1 .cse2 (= main_~B~0 main_~d~0) .cse4 (= main_~p~0 1)) (and .cse0 (= main_~p~0 8) (<= .cse3 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse4) (and .cse0 .cse5 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse4))) [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse5 (<= 0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse4 (<= main_~A~0 5))) (or (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse3) (= main_~p~0 4) .cse4) (and .cse0 .cse5 .cse1 .cse2 (= main_~B~0 main_~d~0) .cse4 (= main_~p~0 1)) (and .cse0 (= main_~p~0 8) (<= .cse3 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse4) (and .cse0 .cse5 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse4))) [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse3 (* main_~B~0 4)) (.cse0 (= main_~A~0 main_~r~0)) (.cse5 (<= 0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse4 (<= main_~A~0 5))) (or (and .cse0 (<= (div main_~d~0 2) main_~r~0) .cse1 .cse2 (= main_~d~0 .cse3) (= main_~p~0 4) .cse4) (and .cse0 .cse5 .cse1 .cse2 (= main_~B~0 main_~d~0) .cse4 (= main_~p~0 1)) (and .cse0 (= main_~p~0 8) (<= .cse3 main_~r~0) .cse1 (= (* main_~B~0 8) main_~d~0) (= main_~d~0 8) .cse4) (and .cse0 .cse5 (= main_~p~0 2) (= main_~d~0 2) .cse1 .cse2 .cse4))) [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:34:39,501 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:34:39,501 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 23:34:39,509 INFO L719 BasicCegarLoop]: Path program histogram: [14, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 23:34:39,510 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 23:34:39,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:34:39 BoogieIcfgContainer [2022-04-06 23:34:39,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 23:34:39,526 INFO L158 Benchmark]: Toolchain (without parser) took 246831.48ms. Allocated memory was 199.2MB in the beginning and 288.4MB in the end (delta: 89.1MB). Free memory was 150.6MB in the beginning and 121.3MB in the end (delta: 29.3MB). Peak memory consumption was 153.2MB. Max. memory is 8.0GB. [2022-04-06 23:34:39,526 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory was 166.5MB in the beginning and 166.4MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 23:34:39,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.21ms. Allocated memory is still 199.2MB. Free memory was 150.3MB in the beginning and 174.4MB in the end (delta: -24.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 23:34:39,527 INFO L158 Benchmark]: Boogie Preprocessor took 21.59ms. Allocated memory is still 199.2MB. Free memory was 174.4MB in the beginning and 173.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 23:34:39,527 INFO L158 Benchmark]: RCFGBuilder took 172.54ms. Allocated memory is still 199.2MB. Free memory was 173.0MB in the beginning and 162.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 23:34:39,528 INFO L158 Benchmark]: TraceAbstraction took 246450.53ms. Allocated memory was 199.2MB in the beginning and 288.4MB in the end (delta: 89.1MB). Free memory was 162.5MB in the beginning and 121.3MB in the end (delta: 41.2MB). Peak memory consumption was 167.3MB. Max. memory is 8.0GB. [2022-04-06 23:34:39,530 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory was 166.5MB in the beginning and 166.4MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.21ms. Allocated memory is still 199.2MB. Free memory was 150.3MB in the beginning and 174.4MB in the end (delta: -24.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.59ms. Allocated memory is still 199.2MB. Free memory was 174.4MB in the beginning and 173.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.54ms. Allocated memory is still 199.2MB. Free memory was 173.0MB in the beginning and 162.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 246450.53ms. Allocated memory was 199.2MB in the beginning and 288.4MB in the end (delta: 89.1MB). Free memory was 162.5MB in the beginning and 121.3MB in the end (delta: 41.2MB). Peak memory consumption was 167.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 246.4s, OverallIterations: 20, TraceHistogramMax: 22, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 394 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 305 mSDsluCounter, 3533 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2620 mSDsCounter, 333 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4583 IncrementalHoareTripleChecker+Invalid, 4916 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 333 mSolverCounterUnsat, 913 mSDtfsCounter, 4583 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2787 GetRequests, 2530 SyntacticMatches, 34 SemanticMatches, 223 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 31.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=13, InterpolantAutomatonStates: 157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 58 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 833 PreInvPairs, 1134 NumberOfFragments, 2349 HoareAnnotationTreeSize, 833 FomulaSimplifications, 1382 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 35 FomulaSimplificationsInter, 6259 FormulaSimplificationTreeSizeReductionInter, 4.5s 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: ((((((((A == r && d / 2 <= r) && q == 0) && B == 1) && d == B * 4) && p == 4) && A <= 5) || ((((((A == r && 0 <= r) && q == 0) && B == 1) && B == d) && A <= 5) && p == 1)) || ((((((A == r && p == 8) && B * 4 <= r) && q == 0) && B * 8 == d) && d == 8) && A <= 5)) || ((((((A == r && 0 <= r) && p == 2) && d == 2) && q == 0) && B == 1) && A <= 5) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-06 23:34:39,661 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...