/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:07:35,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:07:35,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:07:35,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:07:35,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:07:35,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:07:35,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:07:35,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:07:35,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:07:35,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:07:35,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:07:35,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:07:35,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:07:35,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:07:35,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:07:35,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:07:35,309 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:07:35,310 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:07:35,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:07:35,310 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:07:35,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:07:35,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:07:35,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:07:35,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:07:35,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:07:35,506 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:07:35,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-04-07 00:07:35,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77f28ee6/1dffd3b6f0fa4183a5eac80a54ec0687/FLAGf3a102543 [2022-04-07 00:07:35,935 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:07:35,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2022-04-07 00:07:35,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77f28ee6/1dffd3b6f0fa4183a5eac80a54ec0687/FLAGf3a102543 [2022-04-07 00:07:35,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e77f28ee6/1dffd3b6f0fa4183a5eac80a54ec0687 [2022-04-07 00:07:35,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:07:35,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:07:35,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:07:35,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:07:35,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:07:35,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:07:35" (1/1) ... [2022-04-07 00:07:35,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6fc35c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:35, skipping insertion in model container [2022-04-07 00:07:35,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:07:35" (1/1) ... [2022-04-07 00:07:35,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:07:35,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:07:36,169 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2022-04-07 00:07:36,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:07:36,195 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:07:36,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c[537,550] [2022-04-07 00:07:36,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:07:36,236 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:07:36,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36 WrapperNode [2022-04-07 00:07:36,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:07:36,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:07:36,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:07:36,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:07:36,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:07:36,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:07:36,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:07:36,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:07:36,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (1/1) ... [2022-04-07 00:07:36,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:07:36,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:36,313 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) [2022-04-07 00:07:36,335 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 [2022-04-07 00:07:36,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:07:36,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:07:36,350 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:07:36,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:07:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:07:36,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:07:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:07:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:07:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:07:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:07:36,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:07:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:07:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:07:36,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:07:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:07:36,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:07:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:07:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:07:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:07:36,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:07:36,405 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:07:36,407 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:07:36,567 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:07:36,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:07:36,575 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:07:36,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:07:36 BoogieIcfgContainer [2022-04-07 00:07:36,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:07:36,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:07:36,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:07:36,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:07:36,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:07:35" (1/3) ... [2022-04-07 00:07:36,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d52389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:07:36, skipping insertion in model container [2022-04-07 00:07:36,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:07:36" (2/3) ... [2022-04-07 00:07:36,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d52389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:07:36, skipping insertion in model container [2022-04-07 00:07:36,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:07:36" (3/3) ... [2022-04-07 00:07:36,593 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.c [2022-04-07 00:07:36,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:07:36,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:07:36,668 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:07:36,673 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 [2022-04-07 00:07:36,673 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:07:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:07:36,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-07 00:07:36,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:36,708 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:36,709 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-04-07 00:07:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:36,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934969658] [2022-04-07 00:07:36,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:07:36,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 2 times [2022-04-07 00:07:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:36,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052620246] [2022-04-07 00:07:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:36,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:07:36,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:07:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:07:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:07:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:07:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052620246] [2022-04-07 00:07:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052620246] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:36,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:36,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:07:36,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934969658] [2022-04-07 00:07:36,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934969658] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:36,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:36,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:07:36,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136940274] [2022-04-07 00:07:36,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:36,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:07:36,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:07:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:07:36,985 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2022-04-07 00:07:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:37,061 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-07 00:07:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:07:37,063 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 [2022-04-07 00:07:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:37,068 INFO L225 Difference]: With dead ends: 52 [2022-04-07 00:07:37,068 INFO L226 Difference]: Without dead ends: 26 [2022-04-07 00:07:37,070 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 [2022-04-07 00:07:37,073 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:37,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-07 00:07:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-07 00:07:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 00:07:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-07 00:07:37,111 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-07 00:07:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:37,111 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-07 00:07:37,111 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) [2022-04-07 00:07:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-07 00:07:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-07 00:07:37,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:37,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:37,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:07:37,113 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:37,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-04-07 00:07:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:37,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2121552787] [2022-04-07 00:07:37,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:07:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 2 times [2022-04-07 00:07:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:37,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462955270] [2022-04-07 00:07:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:37,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:37,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509895055] [2022-04-07 00:07:37,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:37,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:37,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:37,144 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) [2022-04-07 00:07:37,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:07:37,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:07:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-07 00:07:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:37,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:07:37,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:37,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462955270] [2022-04-07 00:07:37,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:37,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509895055] [2022-04-07 00:07:37,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509895055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:37,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:37,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-07 00:07:37,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2121552787] [2022-04-07 00:07:37,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2121552787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:37,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:37,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-07 00:07:37,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678098554] [2022-04-07 00:07:37,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:37,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-07 00:07:37,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:37,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-07 00:07:37,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 00:07:37,330 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:07:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:37,359 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-07 00:07:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-07 00:07:37,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-07 00:07:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:37,360 INFO L225 Difference]: With dead ends: 34 [2022-04-07 00:07:37,360 INFO L226 Difference]: Without dead ends: 27 [2022-04-07 00:07:37,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-07 00:07:37,362 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:37,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-07 00:07:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-07 00:07:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 00:07:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-07 00:07:37,370 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-07 00:07:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:37,370 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-07 00:07:37,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-07 00:07:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-07 00:07:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-07 00:07:37,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:37,396 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:37,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-07 00:07:37,596 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 [2022-04-07 00:07:37,597 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-04-07 00:07:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:37,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1034024081] [2022-04-07 00:07:37,599 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:07:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 2 times [2022-04-07 00:07:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400225396] [2022-04-07 00:07:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:37,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:37,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986815941] [2022-04-07 00:07:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:37,615 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) [2022-04-07 00:07:37,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:07:37,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:07:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-07 00:07:37,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:37,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:07:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400225396] [2022-04-07 00:07:37,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986815941] [2022-04-07 00:07:37,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986815941] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:37,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:07:37,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:37,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1034024081] [2022-04-07 00:07:37,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1034024081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:37,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:37,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:07:37,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676932345] [2022-04-07 00:07:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:37,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:07:37,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:07:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:07:37,745 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-04-07 00:07:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:37,791 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-07 00:07:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:07:37,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 18 [2022-04-07 00:07:37,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:37,793 INFO L225 Difference]: With dead ends: 38 [2022-04-07 00:07:37,793 INFO L226 Difference]: Without dead ends: 36 [2022-04-07 00:07:37,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:07:37,794 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:37,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-07 00:07:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-07 00:07:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:07:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-07 00:07:37,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-07 00:07:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:37,804 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-07 00:07:37,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2022-04-07 00:07:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-07 00:07:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-07 00:07:37,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:37,806 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, 1] [2022-04-07 00:07:37,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:38,020 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 [2022-04-07 00:07:38,020 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-04-07 00:07:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:38,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134600304] [2022-04-07 00:07:38,022 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:07:38,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 2 times [2022-04-07 00:07:38,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:38,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453906733] [2022-04-07 00:07:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:38,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:38,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880158568] [2022-04-07 00:07:38,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:38,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:38,036 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) [2022-04-07 00:07:38,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:07:38,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:07:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:38,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:07:38,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:38,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:07:38,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453906733] [2022-04-07 00:07:38,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:38,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880158568] [2022-04-07 00:07:38,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880158568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:38,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:38,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:07:38,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134600304] [2022-04-07 00:07:38,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134600304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:38,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:38,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:07:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230722998] [2022-04-07 00:07:38,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:38,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:07:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:07:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:07:38,203 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 00:07:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:38,268 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-07 00:07:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:07:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-07 00:07:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:38,270 INFO L225 Difference]: With dead ends: 42 [2022-04-07 00:07:38,270 INFO L226 Difference]: Without dead ends: 35 [2022-04-07 00:07:38,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:07:38,271 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:38,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-07 00:07:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-07 00:07:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:07:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-07 00:07:38,280 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-07 00:07:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:38,280 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-07 00:07:38,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-07 00:07:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-07 00:07:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:07:38,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:38,281 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:38,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:38,481 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 [2022-04-07 00:07:38,482 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-04-07 00:07:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:38,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280861258] [2022-04-07 00:07:38,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:38,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 2 times [2022-04-07 00:07:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:38,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514054872] [2022-04-07 00:07:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:38,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:38,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452309245] [2022-04-07 00:07:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:38,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:38,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:38,516 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) [2022-04-07 00:07:38,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:07:38,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:07:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:07:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:38,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:38,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514054872] [2022-04-07 00:07:38,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452309245] [2022-04-07 00:07:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452309245] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:38,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-07 00:07:38,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280861258] [2022-04-07 00:07:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280861258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:38,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:38,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:07:38,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358160277] [2022-04-07 00:07:38,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:38,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:07:38,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:38,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:07:38,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:07:38,707 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 00:07:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:38,752 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-04-07 00:07:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:07:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-04-07 00:07:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:38,754 INFO L225 Difference]: With dead ends: 44 [2022-04-07 00:07:38,754 INFO L226 Difference]: Without dead ends: 37 [2022-04-07 00:07:38,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:07:38,761 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:38,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 82 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-07 00:07:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-07 00:07:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:07:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-04-07 00:07:38,773 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2022-04-07 00:07:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:38,773 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-04-07 00:07:38,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-07 00:07:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-07 00:07:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:07:38,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:38,774 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:38,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:38,975 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 [2022-04-07 00:07:38,975 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-04-07 00:07:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [650031425] [2022-04-07 00:07:38,980 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:38,980 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 2 times [2022-04-07 00:07:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:38,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963411728] [2022-04-07 00:07:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:38,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:38,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:38,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736461274] [2022-04-07 00:07:38,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:39,003 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) [2022-04-07 00:07:39,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:07:39,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:07:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:39,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-07 00:07:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:39,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:40,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963411728] [2022-04-07 00:07:40,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:40,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736461274] [2022-04-07 00:07:40,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736461274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:40,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:40,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-07 00:07:40,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:40,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [650031425] [2022-04-07 00:07:40,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [650031425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:40,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:40,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:07:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971014284] [2022-04-07 00:07:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:40,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:07:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:07:40,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:07:40,811 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-04-07 00:07:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:41,084 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-04-07 00:07:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:07:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 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 28 [2022-04-07 00:07:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:41,087 INFO L225 Difference]: With dead ends: 55 [2022-04-07 00:07:41,087 INFO L226 Difference]: Without dead ends: 48 [2022-04-07 00:07:41,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:07:41,088 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:41,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:07:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-07 00:07:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-04-07 00:07:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:07:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-07 00:07:41,098 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2022-04-07 00:07:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:41,098 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-07 00:07:41,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-04-07 00:07:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-07 00:07:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:07:41,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:41,101 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:41,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:41,325 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 [2022-04-07 00:07:41,326 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2022-04-07 00:07:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094843202] [2022-04-07 00:07:41,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:41,330 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 2 times [2022-04-07 00:07:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:41,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842630090] [2022-04-07 00:07:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:41,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792326762] [2022-04-07 00:07:41,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:41,344 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) [2022-04-07 00:07:41,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:07:41,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:07:41,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-07 00:07:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:42,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:48,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:48,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842630090] [2022-04-07 00:07:48,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:48,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792326762] [2022-04-07 00:07:48,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792326762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:48,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:48,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-07 00:07:48,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094843202] [2022-04-07 00:07:48,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094843202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:48,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:48,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:07:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548118225] [2022-04-07 00:07:48,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:48,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:07:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:07:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2022-04-07 00:07:48,446 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-04-07 00:07:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:50,748 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-04-07 00:07:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:07:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 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 28 [2022-04-07 00:07:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:50,749 INFO L225 Difference]: With dead ends: 57 [2022-04-07 00:07:50,749 INFO L226 Difference]: Without dead ends: 55 [2022-04-07 00:07:50,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=64, Invalid=315, Unknown=1, NotChecked=0, Total=380 [2022-04-07 00:07:50,750 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:50,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-07 00:07:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-07 00:07:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-04-07 00:07:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:07:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-04-07 00:07:50,760 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2022-04-07 00:07:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:50,760 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-04-07 00:07:50,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-04-07 00:07:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-04-07 00:07:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-07 00:07:50,761 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:50,762 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:50,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:50,985 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 [2022-04-07 00:07:50,986 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-04-07 00:07:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:50,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945210980] [2022-04-07 00:07:50,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:50,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 2 times [2022-04-07 00:07:50,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:50,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745413502] [2022-04-07 00:07:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:51,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:51,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116366808] [2022-04-07 00:07:51,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:07:51,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:51,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:51,036 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) [2022-04-07 00:07:51,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:07:51,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:07:51,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:07:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:07:51,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:07:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745413502] [2022-04-07 00:07:51,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116366808] [2022-04-07 00:07:51,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116366808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:51,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-07 00:07:51,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945210980] [2022-04-07 00:07:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945210980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:51,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:51,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:07:51,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220943921] [2022-04-07 00:07:51,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:51,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:07:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:07:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:07:51,308 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2022-04-07 00:07:53,315 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 [] [2022-04-07 00:07:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:53,450 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-07 00:07:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:07:53,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 34 [2022-04-07 00:07:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:53,452 INFO L225 Difference]: With dead ends: 59 [2022-04-07 00:07:53,452 INFO L226 Difference]: Without dead ends: 52 [2022-04-07 00:07:53,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:07:53,453 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:53,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-04-07 00:07:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-07 00:07:53,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-07 00:07:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:07:53,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-04-07 00:07:53,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2022-04-07 00:07:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:53,462 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-04-07 00:07:53,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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) [2022-04-07 00:07:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-04-07 00:07:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:07:53,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:53,463 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:53,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:53,679 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 [2022-04-07 00:07:53,680 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 3 times [2022-04-07 00:07:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943773273] [2022-04-07 00:07:53,682 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:53,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 4 times [2022-04-07 00:07:53,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:53,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933167172] [2022-04-07 00:07:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:53,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948840974] [2022-04-07 00:07:53,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:07:53,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:53,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:53,704 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) [2022-04-07 00:07:53,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-07 00:07:53,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:07:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:07:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:07:53,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:07:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933167172] [2022-04-07 00:07:53,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948840974] [2022-04-07 00:07:53,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948840974] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:53,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:53,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-07 00:07:53,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943773273] [2022-04-07 00:07:53,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943773273] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:53,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:53,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:07:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453529660] [2022-04-07 00:07:53,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:53,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:07:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:07:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:07:53,944 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:07:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:53,982 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-04-07 00:07:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:07:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-04-07 00:07:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:53,983 INFO L225 Difference]: With dead ends: 54 [2022-04-07 00:07:53,983 INFO L226 Difference]: Without dead ends: 47 [2022-04-07 00:07:53,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:07:53,984 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:53,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:07:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-07 00:07:53,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-07 00:07:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:07:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-04-07 00:07:53,993 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2022-04-07 00:07:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:53,993 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-04-07 00:07:53,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-07 00:07:53,993 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-07 00:07:53,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:07:53,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:53,994 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:54,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-07 00:07:54,207 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 [2022-04-07 00:07:54,207 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:07:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:07:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 3 times [2022-04-07 00:07:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:54,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [525453701] [2022-04-07 00:07:54,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:07:54,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:07:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 4 times [2022-04-07 00:07:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:07:54,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038426032] [2022-04-07 00:07:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:07:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:07:54,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:07:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616714894] [2022-04-07 00:07:54,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:07:54,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:07:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:07:54,228 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) [2022-04-07 00:07:54,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-07 00:07:54,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:07:54,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:07:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-07 00:07:54,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:07:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:07:57,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:07:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:07:59,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:07:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038426032] [2022-04-07 00:07:59,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:07:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616714894] [2022-04-07 00:07:59,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616714894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:07:59,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:07:59,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-07 00:07:59,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:07:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [525453701] [2022-04-07 00:07:59,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [525453701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:07:59,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:07:59,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:07:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546274985] [2022-04-07 00:07:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:07:59,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:07:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:07:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:07:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:07:59,496 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-04-07 00:07:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:07:59,787 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-04-07 00:07:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:07:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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 38 [2022-04-07 00:07:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:07:59,788 INFO L225 Difference]: With dead ends: 70 [2022-04-07 00:07:59,788 INFO L226 Difference]: Without dead ends: 68 [2022-04-07 00:07:59,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:07:59,789 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:07:59,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 177 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:07:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-07 00:07:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-04-07 00:07:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:07:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-07 00:07:59,800 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-07 00:07:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:07:59,801 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-07 00:07:59,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-04-07 00:07:59,801 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-07 00:07:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:07:59,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:07:59,802 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:07:59,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-07 00:08:00,025 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 [2022-04-07 00:08:00,025 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:08:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:08:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 1 times [2022-04-07 00:08:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:08:00,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [142031457] [2022-04-07 00:08:00,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:08:00,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:08:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 2 times [2022-04-07 00:08:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:08:00,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181603001] [2022-04-07 00:08:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:08:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:08:00,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:08:00,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824025045] [2022-04-07 00:08:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:08:00,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:08:00,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:08:00,040 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) [2022-04-07 00:08:00,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-07 00:08:00,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:08:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:08:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-07 00:08:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:08:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-07 00:08:03,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:08:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:08:07,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:08:07,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181603001] [2022-04-07 00:08:07,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:08:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824025045] [2022-04-07 00:08:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824025045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:08:07,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:08:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-07 00:08:07,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:08:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [142031457] [2022-04-07 00:08:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [142031457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:08:07,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:08:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:08:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577042461] [2022-04-07 00:08:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:08:07,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:08:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:08:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:08:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2022-04-07 00:08:07,982 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-04-07 00:08:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:08:09,127 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-04-07 00:08:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:08:09,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 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 38 [2022-04-07 00:08:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:08:09,129 INFO L225 Difference]: With dead ends: 78 [2022-04-07 00:08:09,129 INFO L226 Difference]: Without dead ends: 76 [2022-04-07 00:08:09,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2022-04-07 00:08:09,130 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:08:09,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 137 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:08:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-07 00:08:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2022-04-07 00:08:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:08:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-07 00:08:09,141 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-07 00:08:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:08:09,141 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-07 00:08:09,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-04-07 00:08:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-07 00:08:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:08:09,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:08:09,142 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:08:09,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-07 00:08:09,342 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 [2022-04-07 00:08:09,343 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:08:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:08:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 3 times [2022-04-07 00:08:09,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:08:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212019657] [2022-04-07 00:08:09,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:08:09,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:08:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 4 times [2022-04-07 00:08:09,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:08:09,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928398521] [2022-04-07 00:08:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:08:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:08:09,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:08:09,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341958519] [2022-04-07 00:08:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:08:09,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:08:09,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:08:09,358 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) [2022-04-07 00:08:09,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-07 00:08:09,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:08:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:08:09,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-07 00:08:09,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:08:10,124 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:08:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-07 00:08:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:08:15,901 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:08:16,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:08:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928398521] [2022-04-07 00:08:16,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:08:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341958519] [2022-04-07 00:08:16,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341958519] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:08:16,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:08:16,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-07 00:08:16,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:08:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212019657] [2022-04-07 00:08:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212019657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:08:16,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:08:16,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:08:16,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674154054] [2022-04-07 00:08:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:08:16,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:08:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:08:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:08:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:08:16,232 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:08:18,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:08:20,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:08:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:08:23,004 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-04-07 00:08:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:08:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-07 00:08:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:08:23,006 INFO L225 Difference]: With dead ends: 78 [2022-04-07 00:08:23,006 INFO L226 Difference]: Without dead ends: 76 [2022-04-07 00:08:23,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:08:23,007 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:08:23,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 217 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-04-07 00:08:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-07 00:08:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2022-04-07 00:08:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:08:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-07 00:08:23,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-07 00:08:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:08:23,038 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-07 00:08:23,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:08:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-07 00:08:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:08:23,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:08:23,041 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:08:23,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-07 00:08:23,263 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 [2022-04-07 00:08:23,264 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:08:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:08:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 3 times [2022-04-07 00:08:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:08:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390406761] [2022-04-07 00:08:23,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:08:23,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:08:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 4 times [2022-04-07 00:08:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:08:23,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418985826] [2022-04-07 00:08:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:08:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:08:23,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:08:23,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813467166] [2022-04-07 00:08:23,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:08:23,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:08:23,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:08:23,284 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) [2022-04-07 00:08:23,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-07 00:08:23,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:08:23,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:08:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-07 00:08:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:09:56,552 WARN L232 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-07 00:10:27,314 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_25 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 Int) (aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 Int) (v_main_~z~0_BEFORE_CALL_23 Int) (aux_div_v_main_~b~0_BEFORE_CALL_26_44 Int) (aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 Int) (aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 Int)) (let ((.cse4 (* v_main_~z~0_BEFORE_CALL_23 2)) (.cse11 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 2))) (let ((.cse3 (* aux_div_v_main_~b~0_BEFORE_CALL_26_44 2)) (.cse6 (* (* v_main_~a~0_BEFORE_CALL_25 aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) 4)) (.cse7 (* (* v_main_~a~0_BEFORE_CALL_25 aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) 2)) (.cse8 (* (* v_main_~a~0_BEFORE_CALL_25 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62) 2)) (.cse9 (* v_main_~a~0_BEFORE_CALL_25 (+ (* aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 (- 4)) .cse11 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62) (* (- 2) aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 1))) (.cse10 (div .cse4 3)) (.cse1 (* aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 4)) (.cse5 (* 2 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62)) (.cse2 (* aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 2)) (.cse0 (+ .cse11 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275))) (and (< .cse0 (+ 2 .cse1 .cse2)) (< .cse0 (+ .cse3 2)) (<= (+ .cse1 .cse2) .cse0) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275) (= (mod .cse4 3) 0) (<= 1 aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) (< aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 2) (< .cse0 (+ .cse1 .cse5 .cse2 1)) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (not (= (+ .cse6 .cse7 .cse8 .cse9) (+ v_main_~z~0_BEFORE_CALL_23 (* 2 (* (div (+ (- 1) (div .cse0 2)) 2) .cse10)))))) (<= 0 aux_div_v_main_~b~0_BEFORE_CALL_26_44) (<= .cse3 .cse0) (= (+ v_main_~z~0_BEFORE_CALL_23 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 .cse10)) (+ .cse6 .cse7 .cse8 .cse9 .cse10)) (<= (+ .cse1 .cse5 .cse2) .cse0) (< aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 2))))) is different from true [2022-04-07 00:10:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-07 00:10:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:10:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-07 00:10:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:10:52,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418985826] [2022-04-07 00:10:52,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:10:52,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813467166] [2022-04-07 00:10:52,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813467166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:10:52,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:10:52,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2022-04-07 00:10:52,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:10:52,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390406761] [2022-04-07 00:10:52,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390406761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:10:52,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:10:52,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:10:52,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547191044] [2022-04-07 00:10:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:10:52,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:10:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:10:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:10:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=246, Unknown=3, NotChecked=32, Total=342 [2022-04-07 00:10:52,181 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:10:53,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:10:58,247 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (exists ((v_main_~a~0_BEFORE_CALL_25 Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 Int) (aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 Int) (v_main_~z~0_BEFORE_CALL_23 Int) (aux_div_v_main_~b~0_BEFORE_CALL_26_44 Int) (aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 Int) (aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 Int)) (let ((.cse4 (* v_main_~z~0_BEFORE_CALL_23 2)) (.cse11 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 2))) (let ((.cse3 (* aux_div_v_main_~b~0_BEFORE_CALL_26_44 2)) (.cse6 (* (* v_main_~a~0_BEFORE_CALL_25 aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) 4)) (.cse7 (* (* v_main_~a~0_BEFORE_CALL_25 aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) 2)) (.cse8 (* (* v_main_~a~0_BEFORE_CALL_25 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62) 2)) (.cse9 (* v_main_~a~0_BEFORE_CALL_25 (+ (* aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 (- 4)) .cse11 (* (- 2) aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62) (* (- 2) aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 1))) (.cse10 (div .cse4 3)) (.cse1 (* aux_div_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 4)) (.cse5 (* 2 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62)) (.cse2 (* aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 2)) (.cse0 (+ .cse11 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275))) (and (< .cse0 (+ 2 .cse1 .cse2)) (< .cse0 (+ .cse3 2)) (<= (+ .cse1 .cse2) .cse0) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275) (= (mod .cse4 3) 0) (<= 1 aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56) (< aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 2) (< .cse0 (+ .cse1 .cse5 .cse2 1)) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (not (= (+ .cse6 .cse7 .cse8 .cse9) (+ v_main_~z~0_BEFORE_CALL_23 (* 2 (* (div (+ (- 1) (div .cse0 2)) 2) .cse10)))))) (<= 0 aux_div_v_main_~b~0_BEFORE_CALL_26_44) (<= .cse3 .cse0) (= (+ v_main_~z~0_BEFORE_CALL_23 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_62_275 .cse10)) (+ .cse6 .cse7 .cse8 .cse9 .cse10)) (<= (+ .cse1 .cse5 .cse2) .cse0) (< aux_mod_aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_26_44_93_56 2)))))) is different from true [2022-04-07 00:10:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:10:59,558 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-07 00:10:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:10:59,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-07 00:10:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:10:59,560 INFO L225 Difference]: With dead ends: 76 [2022-04-07 00:10:59,560 INFO L226 Difference]: Without dead ends: 74 [2022-04-07 00:10:59,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=76, Invalid=308, Unknown=4, NotChecked=74, Total=462 [2022-04-07 00:10:59,561 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:10:59,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 50 Unchecked, 4.7s Time] [2022-04-07 00:10:59,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-07 00:10:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2022-04-07 00:10:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:10:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-07 00:10:59,612 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2022-04-07 00:10:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:10:59,612 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-07 00:10:59,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-07 00:10:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-07 00:10:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:10:59,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:10:59,613 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:10:59,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-07 00:10:59,831 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 [2022-04-07 00:10:59,832 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:10:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:10:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 5 times [2022-04-07 00:10:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:10:59,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624791163] [2022-04-07 00:10:59,835 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:10:59,835 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:10:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 6 times [2022-04-07 00:10:59,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:10:59,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299683177] [2022-04-07 00:10:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:10:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:10:59,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:10:59,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867053217] [2022-04-07 00:10:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:10:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:10:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:10:59,864 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) [2022-04-07 00:10:59,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-07 00:10:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-07 00:10:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:10:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-07 00:10:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:11:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-07 00:11:00,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:11:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:11:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:11:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299683177] [2022-04-07 00:11:00,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:11:00,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867053217] [2022-04-07 00:11:00,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867053217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:11:00,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:11:00,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-04-07 00:11:00,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:11:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624791163] [2022-04-07 00:11:00,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624791163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:11:00,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:11:00,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:11:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363431862] [2022-04-07 00:11:00,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:11:00,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:11:00,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:11:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:11:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-04-07 00:11:00,179 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:11:00,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:11:00,251 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-04-07 00:11:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:11:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-04-07 00:11:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:11:00,252 INFO L225 Difference]: With dead ends: 64 [2022-04-07 00:11:00,252 INFO L226 Difference]: Without dead ends: 57 [2022-04-07 00:11:00,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:11:00,253 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:11:00,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:11:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-07 00:11:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-07 00:11:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:11:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-04-07 00:11:00,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 48 [2022-04-07 00:11:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:11:00,270 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-04-07 00:11:00,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:11:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-04-07 00:11:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:11:00,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:11:00,271 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:11:00,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-07 00:11:00,493 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 [2022-04-07 00:11:00,494 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:11:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:11:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 5 times [2022-04-07 00:11:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:11:00,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694736688] [2022-04-07 00:11:00,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:11:00,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:11:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 6 times [2022-04-07 00:11:00,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:11:00,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459716100] [2022-04-07 00:11:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:11:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:11:00,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:11:00,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290277427] [2022-04-07 00:11:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:11:00,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:11:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:11:00,521 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) [2022-04-07 00:11:00,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-07 00:11:00,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-07 00:11:00,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:11:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-07 00:11:00,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:11:02,146 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:11:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:11:03,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:11:10,342 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:13:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:13:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459716100] [2022-04-07 00:13:57,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:13:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290277427] [2022-04-07 00:13:57,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290277427] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:13:57,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:13:57,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-07 00:13:57,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:13:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694736688] [2022-04-07 00:13:57,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694736688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:13:57,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:13:57,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:13:57,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620863174] [2022-04-07 00:13:57,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:13:57,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:13:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:13:57,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:13:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=483, Unknown=2, NotChecked=0, Total=600 [2022-04-07 00:13:57,152 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-04-07 00:14:03,089 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 [] [2022-04-07 00:14:05,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:09,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:10,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:12,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:13,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:13,932 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-04-07 00:14:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-07 00:14:13,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 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 48 [2022-04-07 00:14:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:13,933 INFO L225 Difference]: With dead ends: 87 [2022-04-07 00:14:13,933 INFO L226 Difference]: Without dead ends: 85 [2022-04-07 00:14:13,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=187, Invalid=803, Unknown=2, NotChecked=0, Total=992 [2022-04-07 00:14:13,934 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:13,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 209 Invalid, 1 Unknown, 14 Unchecked, 11.1s Time] [2022-04-07 00:14:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-07 00:14:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-07 00:14:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.125) internal successors, (72), 66 states have internal predecessors, (72), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:14:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-04-07 00:14:13,963 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 48 [2022-04-07 00:14:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:13,963 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-04-07 00:14:13,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 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) [2022-04-07 00:14:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-04-07 00:14:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:14:13,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:13,986 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:14,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:14,190 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 [2022-04-07 00:14:14,190 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash -446937807, now seen corresponding path program 5 times [2022-04-07 00:14:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2131968863] [2022-04-07 00:14:14,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:14:14,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:14:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -446937807, now seen corresponding path program 6 times [2022-04-07 00:14:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546560956] [2022-04-07 00:14:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:14,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:14,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664182576] [2022-04-07 00:14:14,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:14:14,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:14,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:14,237 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) [2022-04-07 00:14:14,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-07 00:14:14,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-07 00:14:14,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:14,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-07 00:14:14,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:15,198 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:14:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-07 00:14:16,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:14:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-07 00:14:26,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546560956] [2022-04-07 00:14:26,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:26,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664182576] [2022-04-07 00:14:26,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664182576] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:14:26,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:14:26,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-04-07 00:14:26,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:26,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2131968863] [2022-04-07 00:14:26,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2131968863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:26,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:26,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-07 00:14:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110870555] [2022-04-07 00:14:26,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:26,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-07 00:14:26,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:26,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-07 00:14:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:14:26,831 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:14:31,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:14:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:32,123 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2022-04-07 00:14:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:14:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-04-07 00:14:32,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:32,128 INFO L225 Difference]: With dead ends: 120 [2022-04-07 00:14:32,128 INFO L226 Difference]: Without dead ends: 118 [2022-04-07 00:14:32,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:14:32,129 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:32,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 199 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-07 00:14:32,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-07 00:14:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-04-07 00:14:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 78 states have (on average 1.141025641025641) internal successors, (89), 81 states have internal predecessors, (89), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:14:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-04-07 00:14:32,180 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 48 [2022-04-07 00:14:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:32,180 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-04-07 00:14:32,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:14:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-04-07 00:14:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:14:32,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:32,181 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:32,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:32,382 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 [2022-04-07 00:14:32,382 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash 737860273, now seen corresponding path program 7 times [2022-04-07 00:14:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:32,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663809650] [2022-04-07 00:14:32,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:14:32,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:14:32,394 INFO L85 PathProgramCache]: Analyzing trace with hash 737860273, now seen corresponding path program 8 times [2022-04-07 00:14:32,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:32,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187865827] [2022-04-07 00:14:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:32,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:32,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:32,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843671910] [2022-04-07 00:14:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:32,412 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) [2022-04-07 00:14:32,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-07 00:14:32,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:32,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-07 00:14:32,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:15:09,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-07 00:15:13,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:13,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187865827] [2022-04-07 00:15:13,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:13,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843671910] [2022-04-07 00:15:13,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843671910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:13,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:13,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-07 00:15:13,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:13,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663809650] [2022-04-07 00:15:13,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663809650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:13,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:13,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:15:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251250002] [2022-04-07 00:15:13,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:13,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:15:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:15:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:15:13,334 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 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) [2022-04-07 00:15:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:15,354 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2022-04-07 00:15:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-07 00:15:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 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 48 [2022-04-07 00:15:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:15,356 INFO L225 Difference]: With dead ends: 125 [2022-04-07 00:15:15,356 INFO L226 Difference]: Without dead ends: 123 [2022-04-07 00:15:15,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:15:15,357 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:15,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 193 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-07 00:15:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-07 00:15:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2022-04-07 00:15:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 89 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-07 00:15:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2022-04-07 00:15:15,390 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 48 [2022-04-07 00:15:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:15,390 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2022-04-07 00:15:15,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 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) [2022-04-07 00:15:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2022-04-07 00:15:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-07 00:15:15,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:15,391 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:15,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:15,592 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 [2022-04-07 00:15:15,592 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1547206899, now seen corresponding path program 9 times [2022-04-07 00:15:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628532721] [2022-04-07 00:15:15,595 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-07 00:15:15,595 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-07 00:15:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1547206899, now seen corresponding path program 10 times [2022-04-07 00:15:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:15,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487427478] [2022-04-07 00:15:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:15,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:15,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130764521] [2022-04-07 00:15:15,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:15:15,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:15,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:15,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-07 00:15:15,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:15:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:15,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-07 00:15:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:16:47,343 WARN L232 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-07 00:20:33,617 WARN L232 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)