/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:21:17,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:21:17,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:21:17,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:21:17,910 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 21:21:17,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:21:17,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:21:17,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:21:17,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:21:17,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:21:17,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:21:17,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:21:17,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:21:17,921 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:21:17,921 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:21:17,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:21:17,921 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:21:17,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:21:18,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:21:18,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:21:18,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:21:18,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:21:18,157 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:21:18,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-04-06 21:21:18,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6d9dcc1/cac82f76966d477a84c626b14486ebb9/FLAG11307a893 [2022-04-06 21:21:18,602 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:21:18,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-04-06 21:21:18,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6d9dcc1/cac82f76966d477a84c626b14486ebb9/FLAG11307a893 [2022-04-06 21:21:19,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6d9dcc1/cac82f76966d477a84c626b14486ebb9 [2022-04-06 21:21:19,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:21:19,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:21:19,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:21:19,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:21:19,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:21:19,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744c7b25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19, skipping insertion in model container [2022-04-06 21:21:19,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:21:19,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:21:19,248 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/prod4br-ll.c[524,537] [2022-04-06 21:21:19,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:21:19,287 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:21:19,300 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/prod4br-ll.c[524,537] [2022-04-06 21:21:19,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:21:19,329 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:21:19,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19 WrapperNode [2022-04-06 21:21:19,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:21:19,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:21:19,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:21:19,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:21:19,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:21:19,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:21:19,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:21:19,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:21:19,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (1/1) ... [2022-04-06 21:21:19,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:21:19,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:19,404 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 21:21:19,431 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 21:21:19,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:21:19,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:21:19,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:21:19,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:21:19,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:21:19,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:21:19,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:21:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:21:19,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:21:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:21:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:21:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:21:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:21:19,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:21:19,506 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:21:19,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:21:19,674 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:21:19,678 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:21:19,679 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:21:19,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:21:19 BoogieIcfgContainer [2022-04-06 21:21:19,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:21:19,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:21:19,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:21:19,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:21:19,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:21:19" (1/3) ... [2022-04-06 21:21:19,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599510eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:21:19, skipping insertion in model container [2022-04-06 21:21:19,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:21:19" (2/3) ... [2022-04-06 21:21:19,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@599510eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:21:19, skipping insertion in model container [2022-04-06 21:21:19,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:21:19" (3/3) ... [2022-04-06 21:21:19,700 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2022-04-06 21:21:19,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:21:19,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:21:19,766 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:21:19,778 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 21:21:19,778 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:21:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:21:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:21:19,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:19,802 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 21:21:19,803 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 1 times [2022-04-06 21:21:19,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:19,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099295549] [2022-04-06 21:21:19,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 2 times [2022-04-06 21:21:19,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:19,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958620376] [2022-04-06 21:21:19,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:19,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:21:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:21:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:21:19,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:21:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:21:19,972 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 21:21:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:19,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958620376] [2022-04-06 21:21:19,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958620376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:19,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:19,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:21:19,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099295549] [2022-04-06 21:21:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099295549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:19,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:21:19,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902291297] [2022-04-06 21:21:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:19,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:21:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:21:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:21:20,012 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 21:21:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:20,090 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-04-06 21:21:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:21:20,093 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 21:21:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:20,099 INFO L225 Difference]: With dead ends: 53 [2022-04-06 21:21:20,100 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 21:21:20,102 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 21:21:20,106 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:20,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:21:20,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 21:21:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 21:21:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:21:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-04-06 21:21:20,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-04-06 21:21:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:20,143 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-04-06 21:21:20,143 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 21:21:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-06 21:21:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:21:20,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:20,144 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 21:21:20,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:21:20,145 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 1 times [2022-04-06 21:21:20,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:20,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437740051] [2022-04-06 21:21:20,157 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 2 times [2022-04-06 21:21:20,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:20,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3217117] [2022-04-06 21:21:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:20,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:20,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:20,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766858582] [2022-04-06 21:21:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:20,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:20,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:20,182 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 21:21:20,183 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 21:21:20,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:21:20,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:21:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:20,405 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 21:21:20,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:21:20,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:20,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3217117] [2022-04-06 21:21:20,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:20,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766858582] [2022-04-06 21:21:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766858582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:20,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:20,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:21:20,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437740051] [2022-04-06 21:21:20,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437740051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:20,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:20,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:21:20,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376979526] [2022-04-06 21:21:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:20,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:21:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:21:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:21:20,415 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:21:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:20,496 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-06 21:21:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:21:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 21:21:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:20,498 INFO L225 Difference]: With dead ends: 40 [2022-04-06 21:21:20,498 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 21:21:20,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:21:20,499 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:20,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 75 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:21:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 21:21:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-04-06 21:21:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:21:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-04-06 21:21:20,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-04-06 21:21:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:20,509 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-04-06 21:21:20,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:21:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-04-06 21:21:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:21:20,510 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:20,510 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, 1] [2022-04-06 21:21:20,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 21:21:20,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:20,730 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash -253409975, now seen corresponding path program 1 times [2022-04-06 21:21:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1300862599] [2022-04-06 21:21:20,735 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash -253409975, now seen corresponding path program 2 times [2022-04-06 21:21:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:20,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153991107] [2022-04-06 21:21:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:20,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:20,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:20,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736799575] [2022-04-06 21:21:20,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:20,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:20,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:20,779 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 21:21:20,790 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 21:21:20,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:20,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:20,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:21:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:21:21,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:21:21,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153991107] [2022-04-06 21:21:21,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:21,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736799575] [2022-04-06 21:21:21,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736799575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:21,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:21,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 21:21:21,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:21,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1300862599] [2022-04-06 21:21:21,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1300862599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:21,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:21,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:21:21,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852356844] [2022-04-06 21:21:21,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:21,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:21:21,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:21:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:21:21,543 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:21:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:21,767 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-04-06 21:21:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:21:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 21:21:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:21,771 INFO L225 Difference]: With dead ends: 46 [2022-04-06 21:21:21,771 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 21:21:21,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:21:21,783 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:21,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:21:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 21:21:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 21:21:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:21:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-04-06 21:21:21,799 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 23 [2022-04-06 21:21:21,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:21,800 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-04-06 21:21:21,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:21:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-04-06 21:21:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:21:21,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:21,803 INFO L499 BasicCegarLoop]: trace histogram [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 21:21:21,829 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 21:21:22,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:21:22,024 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1855333828, now seen corresponding path program 1 times [2022-04-06 21:21:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:22,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741317547] [2022-04-06 21:21:22,043 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:22,043 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1855333828, now seen corresponding path program 2 times [2022-04-06 21:21:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085364132] [2022-04-06 21:21:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:22,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:22,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915010463] [2022-04-06 21:21:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:22,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:22,074 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 21:21:22,076 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 21:21:22,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:21:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:21:22,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:21:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085364132] [2022-04-06 21:21:22,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915010463] [2022-04-06 21:21:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915010463] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:21:22,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:21:22,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-04-06 21:21:22,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741317547] [2022-04-06 21:21:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741317547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:22,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:21:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335880122] [2022-04-06 21:21:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:22,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:21:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:21:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:21:22,670 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:21:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:23,026 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-04-06 21:21:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:21:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-04-06 21:21:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:23,028 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:21:23,028 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 21:21:23,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:21:23,029 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:23,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:21:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 21:21:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 21:21:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:21:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-04-06 21:21:23,040 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-04-06 21:21:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:23,040 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-04-06 21:21:23,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:21:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-04-06 21:21:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:21:23,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:23,041 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, 1] [2022-04-06 21:21:23,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:21:23,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:23,264 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 642754736, now seen corresponding path program 1 times [2022-04-06 21:21:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117672008] [2022-04-06 21:21:23,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash 642754736, now seen corresponding path program 2 times [2022-04-06 21:21:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022151436] [2022-04-06 21:21:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:23,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:23,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025798261] [2022-04-06 21:21:23,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:23,276 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 21:21:23,284 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 21:21:23,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:21:23,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:23,405 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 21:21:23,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:21:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:23,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022151436] [2022-04-06 21:21:23,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:23,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025798261] [2022-04-06 21:21:23,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025798261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:23,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:23,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:21:23,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117672008] [2022-04-06 21:21:23,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117672008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:23,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:23,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:21:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905125253] [2022-04-06 21:21:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:23,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:21:23,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:21:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:21:23,408 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:23,511 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-04-06 21:21:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:21:23,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-04-06 21:21:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:23,513 INFO L225 Difference]: With dead ends: 60 [2022-04-06 21:21:23,513 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 21:21:23,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:21:23,514 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:23,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 138 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:21:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 21:21:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-04-06 21:21:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 34 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:21:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-04-06 21:21:23,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 28 [2022-04-06 21:21:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:23,525 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-04-06 21:21:23,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-04-06 21:21:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:21:23,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:23,526 INFO L499 BasicCegarLoop]: trace histogram [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 21:21:23,551 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 21:21:23,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:23,748 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash -171609494, now seen corresponding path program 1 times [2022-04-06 21:21:23,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:23,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1966643317] [2022-04-06 21:21:23,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:23,752 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -171609494, now seen corresponding path program 2 times [2022-04-06 21:21:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:23,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705867242] [2022-04-06 21:21:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:23,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:23,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:23,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101480522] [2022-04-06 21:21:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:23,762 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 21:21:23,765 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 21:21:23,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:23,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:23,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 21:21:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:21:23,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:21:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:23,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705867242] [2022-04-06 21:21:23,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:23,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101480522] [2022-04-06 21:21:23,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101480522] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:23,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:23,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:21:23,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1966643317] [2022-04-06 21:21:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1966643317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:23,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:23,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:21:23,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623710033] [2022-04-06 21:21:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:23,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:21:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:21:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:21:23,934 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:24,005 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-04-06 21:21:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:21:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-04-06 21:21:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:24,006 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:21:24,006 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 21:21:24,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:21:24,007 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:24,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 90 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:21:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 21:21:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 21:21:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 36 states have internal predecessors, (43), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:21:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 21:21:24,035 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2022-04-06 21:21:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:24,035 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 21:21:24,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 21:21:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:21:24,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:24,036 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 21:21:24,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:21:24,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:24,261 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash 212948645, now seen corresponding path program 1 times [2022-04-06 21:21:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403946529] [2022-04-06 21:21:24,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:24,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 212948645, now seen corresponding path program 2 times [2022-04-06 21:21:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:24,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136532818] [2022-04-06 21:21:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:24,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:24,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385725431] [2022-04-06 21:21:24,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:24,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:24,281 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 21:21:24,283 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 21:21:24,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:24,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:21:24,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:21:24,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:21:24,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136532818] [2022-04-06 21:21:24,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385725431] [2022-04-06 21:21:24,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385725431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:24,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:24,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 21:21:24,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:24,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403946529] [2022-04-06 21:21:24,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403946529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:24,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:24,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:21:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464312186] [2022-04-06 21:21:24,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:24,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:21:24,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:24,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:21:24,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:21:24,605 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:21:26,951 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:27,457 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-04-06 21:21:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:21:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-04-06 21:21:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:27,459 INFO L225 Difference]: With dead ends: 66 [2022-04-06 21:21:27,459 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 21:21:27,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:21:27,460 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:27,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 21:21:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 21:21:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-04-06 21:21:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 42 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:21:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-04-06 21:21:27,473 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 33 [2022-04-06 21:21:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:27,473 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-04-06 21:21:27,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:21:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-04-06 21:21:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 21:21:27,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:27,474 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 21:21:27,499 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 21:21:27,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:27,675 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash 471114083, now seen corresponding path program 1 times [2022-04-06 21:21:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074080693] [2022-04-06 21:21:27,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:27,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 471114083, now seen corresponding path program 2 times [2022-04-06 21:21:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073582795] [2022-04-06 21:21:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:27,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867914502] [2022-04-06 21:21:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:27,689 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 21:21:27,690 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 21:21:27,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:27,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:21:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:21:28,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 21:21:28,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:28,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073582795] [2022-04-06 21:21:28,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:28,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867914502] [2022-04-06 21:21:28,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867914502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:28,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:28,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 21:21:28,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:28,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074080693] [2022-04-06 21:21:28,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074080693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:28,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:28,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:21:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456003054] [2022-04-06 21:21:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:28,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:21:28,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:28,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:21:28,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:21:28,376 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:29,272 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2022-04-06 21:21:29,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:21:29,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-04-06 21:21:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:29,273 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:21:29,273 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:21:29,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:21:29,274 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:29,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 101 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:21:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:21:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2022-04-06 21:21:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:21:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-04-06 21:21:29,287 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 33 [2022-04-06 21:21:29,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:29,287 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-04-06 21:21:29,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 21:21:29,287 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-04-06 21:21:29,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:21:29,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:29,288 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:29,314 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 21:21:29,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:29,511 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 694423764, now seen corresponding path program 1 times [2022-04-06 21:21:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213005023] [2022-04-06 21:21:29,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:29,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash 694423764, now seen corresponding path program 2 times [2022-04-06 21:21:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:29,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111086413] [2022-04-06 21:21:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:29,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:29,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:29,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076018309] [2022-04-06 21:21:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:29,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:29,539 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 21:21:29,565 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 21:21:29,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:21:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:21:29,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:21:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:29,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111086413] [2022-04-06 21:21:29,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:29,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076018309] [2022-04-06 21:21:29,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076018309] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:29,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:29,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:21:29,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:29,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213005023] [2022-04-06 21:21:29,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213005023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:29,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:29,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:21:29,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243228866] [2022-04-06 21:21:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:29,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:21:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:21:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:21:29,664 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:21:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:29,718 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2022-04-06 21:21:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:21:29,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-04-06 21:21:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:29,720 INFO L225 Difference]: With dead ends: 75 [2022-04-06 21:21:29,720 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 21:21:29,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:21:29,721 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:29,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 96 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:21:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 21:21:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 21:21:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 49 states have internal predecessors, (59), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:21:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-04-06 21:21:29,758 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 38 [2022-04-06 21:21:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:29,758 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-04-06 21:21:29,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:21:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-04-06 21:21:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 21:21:29,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:29,765 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:29,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 21:21:29,965 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,SelfDestructingSolverStorable8 [2022-04-06 21:21:29,966 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:29,966 INFO L85 PathProgramCache]: Analyzing trace with hash -893924138, now seen corresponding path program 1 times [2022-04-06 21:21:29,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:29,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34319297] [2022-04-06 21:21:29,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:29,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash -893924138, now seen corresponding path program 2 times [2022-04-06 21:21:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:29,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152368470] [2022-04-06 21:21:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:29,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:29,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225102705] [2022-04-06 21:21:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:29,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:29,982 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 21:21:29,983 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 21:21:30,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:21:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:21:30,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 21:21:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152368470] [2022-04-06 21:21:30,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:30,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225102705] [2022-04-06 21:21:30,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225102705] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:21:30,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:21:30,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 21:21:30,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:30,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34319297] [2022-04-06 21:21:30,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34319297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:30,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:30,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:21:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776190906] [2022-04-06 21:21:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:30,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:21:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:21:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:21:30,286 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:21:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:30,446 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2022-04-06 21:21:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:21:30,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 38 [2022-04-06 21:21:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:30,447 INFO L225 Difference]: With dead ends: 73 [2022-04-06 21:21:30,447 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 21:21:30,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:21:30,448 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:30,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:21:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 21:21:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-04-06 21:21:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:21:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-04-06 21:21:30,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 38 [2022-04-06 21:21:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:30,462 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-04-06 21:21:30,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:21:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-04-06 21:21:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 21:21:30,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:30,468 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:30,493 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 21:21:30,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:21:30,687 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1791170484, now seen corresponding path program 1 times [2022-04-06 21:21:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025474705] [2022-04-06 21:21:30,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:30,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1791170484, now seen corresponding path program 2 times [2022-04-06 21:21:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107479765] [2022-04-06 21:21:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:30,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:30,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:30,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968553965] [2022-04-06 21:21:30,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:30,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:30,704 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 21:21:30,730 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 21:21:30,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:30,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:30,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:21:30,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 21:21:30,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:21:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107479765] [2022-04-06 21:21:31,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:31,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968553965] [2022-04-06 21:21:31,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968553965] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:31,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:31,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 21:21:31,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:31,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025474705] [2022-04-06 21:21:31,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025474705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:31,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:31,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:21:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752146198] [2022-04-06 21:21:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:31,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:21:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:21:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:21:31,034 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:21:33,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:35,366 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:35,486 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-04-06 21:21:35,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:21:35,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-06 21:21:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:35,488 INFO L225 Difference]: With dead ends: 70 [2022-04-06 21:21:35,488 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 21:21:35,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:21:35,490 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:35,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 21:21:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 21:21:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-04-06 21:21:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:21:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 21:21:35,503 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 40 [2022-04-06 21:21:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:35,503 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 21:21:35,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:21:35,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 21:21:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:21:35,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:35,505 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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 21:21:35,529 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 21:21:35,722 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,SelfDestructingSolverStorable10 [2022-04-06 21:21:35,722 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -304375484, now seen corresponding path program 1 times [2022-04-06 21:21:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804809090] [2022-04-06 21:21:35,727 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:35,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash -304375484, now seen corresponding path program 2 times [2022-04-06 21:21:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:35,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807533639] [2022-04-06 21:21:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:35,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:35,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389618520] [2022-04-06 21:21:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:35,739 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 21:21:35,739 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 21:21:35,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:35,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:21:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:21:36,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 21:21:36,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:36,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807533639] [2022-04-06 21:21:36,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:36,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389618520] [2022-04-06 21:21:36,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389618520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:36,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:36,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 17 [2022-04-06 21:21:36,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804809090] [2022-04-06 21:21:36,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804809090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:36,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:36,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:21:36,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006937719] [2022-04-06 21:21:36,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:36,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:21:36,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:36,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:21:36,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:21:36,601 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 21:21:38,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:39,971 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-04-06 21:21:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:21:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-06 21:21:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:39,972 INFO L225 Difference]: With dead ends: 62 [2022-04-06 21:21:39,972 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 21:21:39,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:21:39,973 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:39,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 117 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 21:21:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 21:21:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2022-04-06 21:21:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:21:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-04-06 21:21:39,984 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 41 [2022-04-06 21:21:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:39,984 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-04-06 21:21:39,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 21:21:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-04-06 21:21:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:21:39,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:39,985 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-06 21:21:40,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 21:21:40,199 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,SelfDestructingSolverStorable11 [2022-04-06 21:21:40,199 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:40,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:40,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567937, now seen corresponding path program 1 times [2022-04-06 21:21:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425954258] [2022-04-06 21:21:40,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:40,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567937, now seen corresponding path program 2 times [2022-04-06 21:21:40,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:40,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981274322] [2022-04-06 21:21:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:40,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:40,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314133361] [2022-04-06 21:21:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:40,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:40,229 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 21:21:40,237 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 21:21:40,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:21:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:21:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:21:40,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981274322] [2022-04-06 21:21:40,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314133361] [2022-04-06 21:21:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314133361] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:21:40,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:21:40,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-04-06 21:21:40,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425954258] [2022-04-06 21:21:40,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425954258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:40,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:40,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:21:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734554560] [2022-04-06 21:21:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:40,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:21:40,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:40,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:21:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:21:40,528 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:21:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:40,574 INFO L93 Difference]: Finished difference Result 91 states and 123 transitions. [2022-04-06 21:21:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:21:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-04-06 21:21:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:40,575 INFO L225 Difference]: With dead ends: 91 [2022-04-06 21:21:40,575 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 21:21:40,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:21:40,576 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:40,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:21:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 21:21:40,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-04-06 21:21:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 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 21:21:40,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-04-06 21:21:40,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 43 [2022-04-06 21:21:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:40,586 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-04-06 21:21:40,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:21:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-04-06 21:21:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 21:21:40,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:40,587 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:40,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:21:40,788 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,SelfDestructingSolverStorable12 [2022-04-06 21:21:40,789 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1476713219, now seen corresponding path program 3 times [2022-04-06 21:21:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:40,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392410150] [2022-04-06 21:21:40,791 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:40,791 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1476713219, now seen corresponding path program 4 times [2022-04-06 21:21:40,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:40,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80848720] [2022-04-06 21:21:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:40,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:40,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387719337] [2022-04-06 21:21:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:21:40,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:40,802 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 21:21:40,802 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 21:21:40,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:21:40,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:21:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:21:41,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:21:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80848720] [2022-04-06 21:21:41,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387719337] [2022-04-06 21:21:41,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387719337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:41,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:41,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-04-06 21:21:41,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392410150] [2022-04-06 21:21:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392410150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:41,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:41,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:21:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434332667] [2022-04-06 21:21:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:41,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:21:41,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:21:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:21:41,482 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 21:21:41,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:41,855 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2022-04-06 21:21:41,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:21:41,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-04-06 21:21:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:41,857 INFO L225 Difference]: With dead ends: 88 [2022-04-06 21:21:41,857 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 21:21:41,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:21:41,858 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:41,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 112 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:21:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 21:21:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2022-04-06 21:21:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 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 21:21:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-04-06 21:21:41,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 43 [2022-04-06 21:21:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:41,871 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-04-06 21:21:41,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 21:21:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-04-06 21:21:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:21:41,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:41,872 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:41,896 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 21:21:42,095 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,SelfDestructingSolverStorable13 [2022-04-06 21:21:42,095 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash -253681627, now seen corresponding path program 3 times [2022-04-06 21:21:42,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [332251076] [2022-04-06 21:21:42,100 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:42,100 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash -253681627, now seen corresponding path program 4 times [2022-04-06 21:21:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014089232] [2022-04-06 21:21:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:42,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:42,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:42,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720104701] [2022-04-06 21:21:42,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:21:42,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:42,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:42,114 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 21:21:42,115 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 21:21:42,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:21:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 21:21:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 21:21:42,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 21:21:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014089232] [2022-04-06 21:21:42,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720104701] [2022-04-06 21:21:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720104701] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:42,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:42,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-04-06 21:21:42,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [332251076] [2022-04-06 21:21:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [332251076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:42,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:42,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:21:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515357650] [2022-04-06 21:21:42,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:42,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:21:42,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:21:42,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:21:42,957 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 21:21:45,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:47,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:49,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:51,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:53,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:53,773 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-04-06 21:21:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:21:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2022-04-06 21:21:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:53,775 INFO L225 Difference]: With dead ends: 90 [2022-04-06 21:21:53,775 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 21:21:53,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:21:53,776 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:53,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 118 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 4 Unknown, 0 Unchecked, 10.1s Time] [2022-04-06 21:21:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 21:21:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2022-04-06 21:21:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:21:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-04-06 21:21:53,793 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 49 [2022-04-06 21:21:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:53,793 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-04-06 21:21:53,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 21:21:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-04-06 21:21:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:21:53,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:53,794 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 21:21:53,819 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 21:21:54,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:54,019 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1751157664, now seen corresponding path program 1 times [2022-04-06 21:21:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:54,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744943278] [2022-04-06 21:21:54,026 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:54,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1751157664, now seen corresponding path program 2 times [2022-04-06 21:21:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:54,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857467038] [2022-04-06 21:21:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:54,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:54,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057705777] [2022-04-06 21:21:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:54,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:54,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:54,036 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 21:21:54,045 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 21:21:54,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:21:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 21:21:54,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 21:21:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857467038] [2022-04-06 21:21:54,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057705777] [2022-04-06 21:21:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057705777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:54,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:54,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 17 [2022-04-06 21:21:54,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744943278] [2022-04-06 21:21:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744943278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:54,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:54,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:21:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196576861] [2022-04-06 21:21:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:54,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:21:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:21:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:21:54,898 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 21:21:57,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:21:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:58,176 INFO L93 Difference]: Finished difference Result 99 states and 130 transitions. [2022-04-06 21:21:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:21:58,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-04-06 21:21:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:58,177 INFO L225 Difference]: With dead ends: 99 [2022-04-06 21:21:58,177 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 21:21:58,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:21:58,178 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:58,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 296 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 21:21:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 21:21:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2022-04-06 21:21:58,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:21:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-04-06 21:21:58,199 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 51 [2022-04-06 21:21:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:58,199 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-04-06 21:21:58,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-04-06 21:21:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-04-06 21:21:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 21:21:58,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:58,200 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:58,217 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 21:21:58,403 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,SelfDestructingSolverStorable15 [2022-04-06 21:21:58,403 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1773789918, now seen corresponding path program 5 times [2022-04-06 21:21:58,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566174187] [2022-04-06 21:21:58,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:21:58,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:21:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1773789918, now seen corresponding path program 6 times [2022-04-06 21:21:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:58,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206299374] [2022-04-06 21:21:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:58,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046309597] [2022-04-06 21:21:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:21:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:58,417 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 21:21:58,446 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 21:21:58,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:21:58,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:21:58,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 21:21:58,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 21:21:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:58,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206299374] [2022-04-06 21:21:58,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046309597] [2022-04-06 21:21:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046309597] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:58,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:58,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 21:21:58,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566174187] [2022-04-06 21:21:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566174187] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:58,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:58,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:21:58,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492820307] [2022-04-06 21:21:58,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:58,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:21:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:21:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:21:58,756 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 21:22:00,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:22:03,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:22:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:22:03,268 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2022-04-06 21:22:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:22:03,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-04-06 21:22:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:22:03,269 INFO L225 Difference]: With dead ends: 71 [2022-04-06 21:22:03,269 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:22:03,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:22:03,270 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:22:03,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 82 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 21:22:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:22:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:22:03,272 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 21:22:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:22:03,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2022-04-06 21:22:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:22:03,272 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:22:03,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 21:22:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:22:03,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:22:03,275 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:22:03,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:22:03,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:22:03,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:23:30,237 WARN L232 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 124 DAG size of output: 34 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:24:32,607 WARN L232 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 114 DAG size of output: 24 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:25:10,595 WARN L232 SmtUtils]: Spent 37.99s on a formula simplification. DAG size of input: 120 DAG size of output: 32 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:25:26,520 WARN L232 SmtUtils]: Spent 15.92s on a formula simplification. DAG size of input: 117 DAG size of output: 24 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:25:50,835 WARN L232 SmtUtils]: Spent 24.31s on a formula simplification. DAG size of input: 115 DAG size of output: 32 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:25:50,906 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-04-06 21:25:50,906 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-04-06 21:25:50,906 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-04-06 21:25:50,906 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-04-06 21:25:50,906 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 21:25:50,906 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) 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 21:25:50,906 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) 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 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse1) (and .cse0 (<= 1 main_~b~0) .cse1))) [2022-04-06 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L33-1(lines 32 53) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~x~0))) (let ((.cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse1)) (.cse2 (<= 1 main_~y~0))) (or (and .cse0 (= main_~q~0 .cse1) (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse2) (and .cse0 (= (mod (+ .cse1 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (<= 1 main_~b~0) .cse2)))) [2022-04-06 21:25:50,907 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-06 21:25:50,907 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 58) the Hoare annotation is: true [2022-04-06 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (<= 1 main_~y~0) [2022-04-06 21:25:50,907 INFO L885 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: true [2022-04-06 21:25:50,907 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 58) the Hoare annotation is: true [2022-04-06 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L42(lines 42 52) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L38(lines 38 52) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 21:25:50,907 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-06 21:25:50,907 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 58) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (and (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-06 21:25:50,908 INFO L878 garLoopResultBuilder]: At program point L45(lines 45 52) the Hoare annotation is: (let ((.cse1 (* main_~y~0 main_~x~0)) (.cse0 (not (= (mod main_~b~0 2) 0)))) (and (or .cse0 (not (= (mod main_~a~0 2) 0))) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse1) (= (mod (+ .cse1 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (or .cse0 (< main_~a~0 0)) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 21:25:50,908 INFO L878 garLoopResultBuilder]: At program point L45-2(lines 32 53) the Hoare annotation is: (let ((.cse0 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse1) (and .cse0 (<= 1 main_~b~0) .cse1))) [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 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 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-04-06 21:25:50,908 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 21:25:50,909 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 21:25:50,909 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 21:25:50,909 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 21:25:50,909 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 21:25:50,911 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 21:25:50,912 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:25:50,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:25:50 BoogieIcfgContainer [2022-04-06 21:25:50,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:25:50,925 INFO L158 Benchmark]: Toolchain (without parser) took 271901.94ms. Allocated memory was 191.9MB in the beginning and 382.7MB in the end (delta: 190.8MB). Free memory was 144.2MB in the beginning and 284.4MB in the end (delta: -140.2MB). Peak memory consumption was 209.6MB. Max. memory is 8.0GB. [2022-04-06 21:25:50,925 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 160.0MB in the beginning and 159.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:25:50,925 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.54ms. Allocated memory is still 191.9MB. Free memory was 144.0MB in the beginning and 168.6MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 21:25:50,925 INFO L158 Benchmark]: Boogie Preprocessor took 38.50ms. Allocated memory is still 191.9MB. Free memory was 168.6MB in the beginning and 167.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 21:25:50,926 INFO L158 Benchmark]: RCFGBuilder took 309.07ms. Allocated memory is still 191.9MB. Free memory was 167.0MB in the beginning and 156.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 21:25:50,926 INFO L158 Benchmark]: TraceAbstraction took 271242.66ms. Allocated memory was 191.9MB in the beginning and 382.7MB in the end (delta: 190.8MB). Free memory was 155.5MB in the beginning and 284.4MB in the end (delta: -128.9MB). Peak memory consumption was 221.9MB. Max. memory is 8.0GB. [2022-04-06 21:25:50,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 160.0MB in the beginning and 159.9MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 304.54ms. Allocated memory is still 191.9MB. Free memory was 144.0MB in the beginning and 168.6MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.50ms. Allocated memory is still 191.9MB. Free memory was 168.6MB in the beginning and 167.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 309.07ms. Allocated memory is still 191.9MB. Free memory was 167.0MB in the beginning and 156.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 271242.66ms. Allocated memory was 191.9MB in the beginning and 382.7MB in the end (delta: 190.8MB). Free memory was 155.5MB in the beginning and 284.4MB in the end (delta: -128.9MB). Peak memory consumption was 221.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 271.1s, OverallIterations: 17, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 31.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 227.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 353 SdHoareTripleChecker+Valid, 29.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 327 mSDsluCounter, 1693 SdHoareTripleChecker+Invalid, 29.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1304 mSDsCounter, 144 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1993 IncrementalHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 144 mSolverCounterUnsat, 389 mSDtfsCounter, 1993 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1100 GetRequests, 879 SyntacticMatches, 12 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=16, InterpolantAutomatonStates: 161, 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, 17 MinimizatonAttempts, 136 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 223 PreInvPairs, 346 NumberOfFragments, 392 HoareAnnotationTreeSize, 223 FomulaSimplifications, 72106 FormulaSimplificationTreeSizeReduction, 9.9s HoareSimplificationTime, 31 FomulaSimplificationsInter, 607260 FormulaSimplificationTreeSizeReductionInter, 217.5s 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: 32]: Loop Invariant Derived loop invariant: (((q + b * a * p == y * x && !((a + 1) % 2 == 0)) && 0 <= b) && 1 <= y) || ((q + b * a * p == y * x && 1 <= b) && 1 <= y) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: 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 21:25:50,985 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...