/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:04:13,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:04:13,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:04:13,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 18:04:13,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:04:13,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:04:13,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:04:13,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:04:13,264 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:04:13,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:04:13,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:04:13,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:04:13,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:04:13,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:04:13,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:04:13,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:04:13,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:04:13,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:04:13,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:04:13,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:04:13,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:04:13,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:04:13,267 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:04:13,268 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:04:13,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:04:13,268 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:04:13,268 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:04:13,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:04:13,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:04:13,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:04:13,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:04:13,483 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:04:13,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-04-06 18:04:13,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2424a197/e3f9b5aa5a164696b326043906345240/FLAGa409271e1 [2022-04-06 18:04:13,881 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:04:13,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound50.c [2022-04-06 18:04:13,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2424a197/e3f9b5aa5a164696b326043906345240/FLAGa409271e1 [2022-04-06 18:04:13,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2424a197/e3f9b5aa5a164696b326043906345240 [2022-04-06 18:04:13,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:04:13,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:04:13,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:04:13,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:04:13,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:04:13,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:04:13" (1/1) ... [2022-04-06 18:04:13,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79456869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:13, skipping insertion in model container [2022-04-06 18:04:13,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:04:13" (1/1) ... [2022-04-06 18:04:13,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:04:13,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:04:14,049 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/prod4br-ll_valuebound50.c[524,537] [2022-04-06 18:04:14,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:04:14,079 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:04:14,089 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/prod4br-ll_valuebound50.c[524,537] [2022-04-06 18:04:14,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:04:14,106 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:04:14,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14 WrapperNode [2022-04-06 18:04:14,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:04:14,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:04:14,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:04:14,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:04:14,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:04:14,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:04:14,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:04:14,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:04:14,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (1/1) ... [2022-04-06 18:04:14,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:04:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:14,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 18:04:14,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 18:04:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:04:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:04:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:04:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:04:14,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:04:14,225 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:04:14,226 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:04:14,329 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:04:14,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:04:14,332 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:04:14,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:04:14 BoogieIcfgContainer [2022-04-06 18:04:14,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:04:14,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:04:14,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:04:14,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:04:14,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:04:13" (1/3) ... [2022-04-06 18:04:14,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b1ca08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:04:14, skipping insertion in model container [2022-04-06 18:04:14,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:04:14" (2/3) ... [2022-04-06 18:04:14,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b1ca08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:04:14, skipping insertion in model container [2022-04-06 18:04:14,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:04:14" (3/3) ... [2022-04-06 18:04:14,339 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound50.c [2022-04-06 18:04:14,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:04:14,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:04:14,368 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:04:14,372 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 18:04:14,372 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:04:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 18:04:14,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 18:04:14,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:14,386 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:14,386 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-04-06 18:04:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:14,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2039643699] [2022-04-06 18:04:14,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 2 times [2022-04-06 18:04:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247063210] [2022-04-06 18:04:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:14,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:04:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:04:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:04:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:04:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:04:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 18:04:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:04:14,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 18:04:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:04:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:14,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247063210] [2022-04-06 18:04:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247063210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:14,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:14,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:04:14,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:14,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2039643699] [2022-04-06 18:04:14,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2039643699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:14,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:14,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:04:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791688049] [2022-04-06 18:04:14,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:14,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:04:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:04:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:04:14,612 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:04:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:14,660 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-04-06 18:04:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:04:14,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 18:04:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:14,680 INFO L225 Difference]: With dead ends: 61 [2022-04-06 18:04:14,680 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 18:04:14,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:04:14,684 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:14,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:04:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 18:04:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 18:04:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 18:04:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-04-06 18:04:14,722 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-04-06 18:04:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:14,722 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-04-06 18:04:14,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 18:04:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-04-06 18:04:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 18:04:14,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:14,723 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:14,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:04:14,724 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-04-06 18:04:14,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:14,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841109431] [2022-04-06 18:04:14,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:14,725 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 2 times [2022-04-06 18:04:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067080751] [2022-04-06 18:04:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:14,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:14,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418659963] [2022-04-06 18:04:14,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:14,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:14,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:14,747 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:14,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:04:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:04:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 18:04:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:14,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:04:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067080751] [2022-04-06 18:04:14,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:14,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418659963] [2022-04-06 18:04:14,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418659963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:14,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:14,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:04:14,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841109431] [2022-04-06 18:04:14,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841109431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:14,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:04:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550610801] [2022-04-06 18:04:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:14,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:04:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:04:14,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:04:14,971 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 18:04:15,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:15,059 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 18:04:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:04:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 18:04:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:15,061 INFO L225 Difference]: With dead ends: 43 [2022-04-06 18:04:15,061 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 18:04:15,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:04:15,063 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:15,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:04:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 18:04:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-04-06 18:04:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 18:04:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-04-06 18:04:15,073 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-04-06 18:04:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:15,073 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-04-06 18:04:15,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 18:04:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-04-06 18:04:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 18:04:15,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:15,074 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:15,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:15,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:15,296 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-04-06 18:04:15,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:15,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745159469] [2022-04-06 18:04:15,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 2 times [2022-04-06 18:04:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:15,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106474906] [2022-04-06 18:04:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:15,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:15,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290236392] [2022-04-06 18:04:15,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:15,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:15,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:15,331 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:15,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:04:15,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 18:04:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:04:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:15,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106474906] [2022-04-06 18:04:15,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290236392] [2022-04-06 18:04:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290236392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:15,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:15,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 18:04:15,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:15,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745159469] [2022-04-06 18:04:15,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745159469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:15,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:15,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:04:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063881001] [2022-04-06 18:04:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:15,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:04:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:04:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:04:15,850 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:04:18,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:18,309 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 18:04:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:04:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-04-06 18:04:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:18,311 INFO L225 Difference]: With dead ends: 47 [2022-04-06 18:04:18,311 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 18:04:18,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:04:18,312 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:18,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 129 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 18:04:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 18:04:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-04-06 18:04:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 18:04:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-06 18:04:18,320 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 34 [2022-04-06 18:04:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:18,320 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-06 18:04:18,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:04:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-06 18:04:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 18:04:18,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:18,321 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:18,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:18,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 18:04:18,538 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:18,538 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 1 times [2022-04-06 18:04:18,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:18,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061256296] [2022-04-06 18:04:18,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 2 times [2022-04-06 18:04:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:18,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915797296] [2022-04-06 18:04:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:18,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:18,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127445629] [2022-04-06 18:04:18,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:18,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:18,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:18,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:04:18,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:18,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 18:04:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:04:21,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:04:21,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915797296] [2022-04-06 18:04:21,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127445629] [2022-04-06 18:04:21,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127445629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:21,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:21,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 18:04:21,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:21,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061256296] [2022-04-06 18:04:21,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061256296] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:21,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:21,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:04:21,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084614248] [2022-04-06 18:04:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:21,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:04:21,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:04:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:04:21,559 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:04:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:21,800 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-04-06 18:04:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:04:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-06 18:04:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:21,802 INFO L225 Difference]: With dead ends: 59 [2022-04-06 18:04:21,802 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 18:04:21,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:04:21,803 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:21,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:04:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 18:04:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-04-06 18:04:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 18:04:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-04-06 18:04:21,811 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2022-04-06 18:04:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:21,811 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-04-06 18:04:21,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 18:04:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-04-06 18:04:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 18:04:21,812 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:21,812 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:21,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:22,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:22,029 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 1 times [2022-04-06 18:04:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880693329] [2022-04-06 18:04:22,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 2 times [2022-04-06 18:04:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221194663] [2022-04-06 18:04:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:22,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:22,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:22,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241098290] [2022-04-06 18:04:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:22,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:22,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:22,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:22,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 18:04:22,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 18:04:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:04:22,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221194663] [2022-04-06 18:04:22,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241098290] [2022-04-06 18:04:22,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241098290] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 18:04:22,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:04:22,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 12 [2022-04-06 18:04:22,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880693329] [2022-04-06 18:04:22,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880693329] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:22,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:22,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:04:22,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547763206] [2022-04-06 18:04:22,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:22,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:04:22,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:04:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:04:22,576 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:04:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:22,932 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-04-06 18:04:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:04:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-06 18:04:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:22,935 INFO L225 Difference]: With dead ends: 54 [2022-04-06 18:04:22,935 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 18:04:22,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:04:22,936 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:22,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:04:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 18:04:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-04-06 18:04:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 18:04:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-04-06 18:04:22,942 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 37 [2022-04-06 18:04:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:22,942 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-04-06 18:04:22,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 18:04:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-04-06 18:04:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 18:04:22,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:22,943 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:22,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:23,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:23,165 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 1 times [2022-04-06 18:04:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:23,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110647274] [2022-04-06 18:04:23,166 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 2 times [2022-04-06 18:04:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960847411] [2022-04-06 18:04:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:23,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:23,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863578901] [2022-04-06 18:04:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:23,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:23,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:23,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:23,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 18:04:23,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 18:04:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:04:23,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 18:04:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960847411] [2022-04-06 18:04:23,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863578901] [2022-04-06 18:04:23,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863578901] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 18:04:23,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:04:23,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 18:04:23,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110647274] [2022-04-06 18:04:23,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110647274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:23,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:23,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:04:23,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818850560] [2022-04-06 18:04:23,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:23,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:04:23,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:23,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:04:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:04:23,472 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:23,617 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-04-06 18:04:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:04:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-04-06 18:04:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:23,618 INFO L225 Difference]: With dead ends: 51 [2022-04-06 18:04:23,618 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 18:04:23,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:04:23,618 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:23,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:04:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 18:04:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 18:04:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 18:04:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-04-06 18:04:23,623 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 39 [2022-04-06 18:04:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:23,624 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-04-06 18:04:23,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-04-06 18:04:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 18:04:23,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:23,624 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, 1, 1, 1, 1] [2022-04-06 18:04:23,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:23,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:23,844 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 1 times [2022-04-06 18:04:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [276447925] [2022-04-06 18:04:23,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 2 times [2022-04-06 18:04:23,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:23,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51363810] [2022-04-06 18:04:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:23,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:23,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029433710] [2022-04-06 18:04:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:23,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:23,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:23,875 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:23,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 18:04:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 18:04:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:04:24,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:04:24,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51363810] [2022-04-06 18:04:24,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029433710] [2022-04-06 18:04:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029433710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:24,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-04-06 18:04:24,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [276447925] [2022-04-06 18:04:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [276447925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:24,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:04:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539059239] [2022-04-06 18:04:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:24,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:04:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:04:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:04:24,266 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 18:04:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:24,349 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-04-06 18:04:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:04:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-04-06 18:04:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:24,350 INFO L225 Difference]: With dead ends: 52 [2022-04-06 18:04:24,350 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 18:04:24,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:04:24,351 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:24,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:04:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 18:04:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-04-06 18:04:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 18:04:24,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-04-06 18:04:24,358 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 42 [2022-04-06 18:04:24,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:24,358 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-04-06 18:04:24,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 18:04:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-04-06 18:04:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 18:04:24,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:24,359 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, 1, 1, 1, 1, 1] [2022-04-06 18:04:24,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:24,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:24,575 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 1 times [2022-04-06 18:04:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1858333588] [2022-04-06 18:04:24,576 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 2 times [2022-04-06 18:04:24,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100172019] [2022-04-06 18:04:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:24,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:24,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979490472] [2022-04-06 18:04:24,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:24,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:24,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 18:04:24,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:04:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 18:04:24,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 18:04:24,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100172019] [2022-04-06 18:04:24,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979490472] [2022-04-06 18:04:24,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979490472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:24,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:24,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 18:04:24,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:24,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1858333588] [2022-04-06 18:04:24,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1858333588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:24,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:24,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:04:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233416261] [2022-04-06 18:04:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:24,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:04:24,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:04:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:04:24,886 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:27,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:27,268 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-06 18:04:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:04:27,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-04-06 18:04:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:27,269 INFO L225 Difference]: With dead ends: 58 [2022-04-06 18:04:27,269 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 18:04:27,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:04:27,270 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:27,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 18:04:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 18:04:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-04-06 18:04:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 18:04:27,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-04-06 18:04:27,277 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 43 [2022-04-06 18:04:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:27,277 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-04-06 18:04:27,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-04-06 18:04:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 18:04:27,278 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:27,278 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, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:27,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 18:04:27,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:27,492 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 1 times [2022-04-06 18:04:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751226336] [2022-04-06 18:04:27,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 2 times [2022-04-06 18:04:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:27,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546013529] [2022-04-06 18:04:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:27,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:27,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:27,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309687169] [2022-04-06 18:04:27,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:27,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:27,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:27,501 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:27,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 18:04:27,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:27,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:27,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 18:04:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 18:04:27,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 18:04:27,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546013529] [2022-04-06 18:04:27,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309687169] [2022-04-06 18:04:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309687169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:27,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 18:04:27,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:27,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751226336] [2022-04-06 18:04:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751226336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:27,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:04:27,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647857980] [2022-04-06 18:04:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:27,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:04:27,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:04:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:04:27,791 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:29,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:30,072 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-04-06 18:04:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:04:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-06 18:04:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:30,073 INFO L225 Difference]: With dead ends: 53 [2022-04-06 18:04:30,073 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 18:04:30,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:04:30,073 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:30,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 18:04:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 18:04:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-04-06 18:04:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 18:04:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-04-06 18:04:30,079 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 44 [2022-04-06 18:04:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:30,079 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-04-06 18:04:30,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 18:04:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-04-06 18:04:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 18:04:30,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:30,080 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, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:30,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:30,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 18:04:30,288 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 1 times [2022-04-06 18:04:30,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731348089] [2022-04-06 18:04:30,289 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:30,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 2 times [2022-04-06 18:04:30,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:30,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279572753] [2022-04-06 18:04:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:30,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:30,295 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:30,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870822542] [2022-04-06 18:04:30,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:30,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:30,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:30,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:30,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 18:04:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 18:04:30,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:30,580 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 18:04:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 18:04:30,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 18:04:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279572753] [2022-04-06 18:04:31,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870822542] [2022-04-06 18:04:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870822542] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:31,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:31,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-04-06 18:04:31,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731348089] [2022-04-06 18:04:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731348089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:31,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:04:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776023901] [2022-04-06 18:04:31,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:31,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:04:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:04:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:04:31,045 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 18:04:33,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:36,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:36,317 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-04-06 18:04:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:04:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-04-06 18:04:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:36,318 INFO L225 Difference]: With dead ends: 57 [2022-04-06 18:04:36,318 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 18:04:36,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:04:36,319 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:36,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 165 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 265 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 18:04:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 18:04:36,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-04-06 18:04:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 18:04:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-04-06 18:04:36,327 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 44 [2022-04-06 18:04:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:36,328 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-04-06 18:04:36,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 18:04:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-04-06 18:04:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 18:04:36,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:36,328 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:36,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:36,544 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 18:04:36,545 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 1 times [2022-04-06 18:04:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:36,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793557709] [2022-04-06 18:04:36,545 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 2 times [2022-04-06 18:04:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887077990] [2022-04-06 18:04:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:36,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:36,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891349120] [2022-04-06 18:04:36,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:36,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:36,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:36,555 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:36,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 18:04:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 18:04:36,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:37,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 18:04:37,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887077990] [2022-04-06 18:04:37,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891349120] [2022-04-06 18:04:37,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891349120] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:37,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:37,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-04-06 18:04:37,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:37,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793557709] [2022-04-06 18:04:37,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793557709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:37,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:37,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:04:37,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160292838] [2022-04-06 18:04:37,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:37,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:04:37,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:37,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:04:37,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:04:37,509 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 18:04:39,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:42,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:45,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:47,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:04:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:47,182 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2022-04-06 18:04:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:04:47,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-04-06 18:04:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:47,182 INFO L225 Difference]: With dead ends: 63 [2022-04-06 18:04:47,183 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 18:04:47,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:04:47,183 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 37 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:47,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 123 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 308 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2022-04-06 18:04:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 18:04:47,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-04-06 18:04:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 18:04:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-04-06 18:04:47,211 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 52 [2022-04-06 18:04:47,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:47,211 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-04-06 18:04:47,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 18:04:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-04-06 18:04:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 18:04:47,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:47,213 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:47,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:47,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 18:04:47,429 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 1 times [2022-04-06 18:04:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:47,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705996291] [2022-04-06 18:04:47,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 2 times [2022-04-06 18:04:47,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:47,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664055955] [2022-04-06 18:04:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:47,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:47,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:47,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666111941] [2022-04-06 18:04:47,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:04:47,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:47,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:47,449 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:47,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 18:04:47,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:04:47,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 18:04:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 18:04:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:47,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664055955] [2022-04-06 18:04:47,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:47,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666111941] [2022-04-06 18:04:47,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666111941] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 18:04:47,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:04:47,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-04-06 18:04:47,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705996291] [2022-04-06 18:04:47,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705996291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:47,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:47,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:04:47,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544100990] [2022-04-06 18:04:47,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:47,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:04:47,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:04:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:04:47,991 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 18:04:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:48,174 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-04-06 18:04:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:04:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-04-06 18:04:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:48,175 INFO L225 Difference]: With dead ends: 72 [2022-04-06 18:04:48,175 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 18:04:48,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:04:48,175 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:48,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 95 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:04:48,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 18:04:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-04-06 18:04:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 18:04:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-04-06 18:04:48,188 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 53 [2022-04-06 18:04:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:48,188 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-04-06 18:04:48,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 18:04:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-04-06 18:04:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 18:04:48,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:48,189 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:48,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:48,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 18:04:48,417 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 3 times [2022-04-06 18:04:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408570684] [2022-04-06 18:04:48,418 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 4 times [2022-04-06 18:04:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:48,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526744795] [2022-04-06 18:04:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:48,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:48,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219368907] [2022-04-06 18:04:48,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:04:48,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:48,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:48,429 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:48,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 18:04:48,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:04:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 18:04:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:04:48,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 18:04:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526744795] [2022-04-06 18:04:48,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:48,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219368907] [2022-04-06 18:04:48,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219368907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:48,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:48,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-04-06 18:04:48,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:48,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408570684] [2022-04-06 18:04:48,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408570684] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:48,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:48,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:04:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070658837] [2022-04-06 18:04:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:48,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:04:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:04:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:04:48,949 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 18:04:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:04:49,100 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2022-04-06 18:04:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:04:49,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2022-04-06 18:04:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:04:49,101 INFO L225 Difference]: With dead ends: 84 [2022-04-06 18:04:49,101 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 18:04:49,101 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:04:49,101 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:04:49,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 124 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:04:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 18:04:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-04-06 18:04:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 18:04:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-04-06 18:04:49,120 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 54 [2022-04-06 18:04:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:04:49,120 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-04-06 18:04:49,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-06 18:04:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-04-06 18:04:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 18:04:49,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:04:49,121 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:04:49,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 18:04:49,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 18:04:49,337 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:04:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:04:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 3 times [2022-04-06 18:04:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938281186] [2022-04-06 18:04:49,338 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:04:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 4 times [2022-04-06 18:04:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:04:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130177726] [2022-04-06 18:04:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:04:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:04:49,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:04:49,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258911354] [2022-04-06 18:04:49,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:04:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:04:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:04:49,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:04:49,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 18:04:49,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:04:49,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:04:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 18:04:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:04:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 18:04:49,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:04:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 18:04:53,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:04:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130177726] [2022-04-06 18:04:53,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:04:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258911354] [2022-04-06 18:04:53,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258911354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:04:53,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:04:53,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-04-06 18:04:53,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:04:53,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938281186] [2022-04-06 18:04:53,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938281186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:04:53,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:04:53,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:04:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081250678] [2022-04-06 18:04:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:04:53,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:04:53,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:04:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:04:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:04:53,346 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 18:04:56,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:00,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:05:00,484 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-04-06 18:05:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:05:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-04-06 18:05:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:05:00,485 INFO L225 Difference]: With dead ends: 98 [2022-04-06 18:05:00,485 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 18:05:00,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:05:00,486 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 34 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:05:00,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 117 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 240 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-04-06 18:05:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 18:05:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-04-06 18:05:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 18:05:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-04-06 18:05:00,535 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 60 [2022-04-06 18:05:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:05:00,535 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-04-06 18:05:00,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-06 18:05:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-04-06 18:05:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:05:00,536 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:05:00,536 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:05:00,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 18:05:00,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 18:05:00,753 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:05:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:05:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash 464884373, now seen corresponding path program 1 times [2022-04-06 18:05:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:05:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205680565] [2022-04-06 18:05:00,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:05:00,754 INFO L85 PathProgramCache]: Analyzing trace with hash 464884373, now seen corresponding path program 2 times [2022-04-06 18:05:00,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:05:00,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663901710] [2022-04-06 18:05:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:05:00,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:05:00,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:05:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980445678] [2022-04-06 18:05:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:05:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:05:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:05:00,770 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:05:00,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 18:05:00,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:05:00,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:05:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 18:05:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:05:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 18:05:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:05:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 18:05:02,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:05:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663901710] [2022-04-06 18:05:02,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:05:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980445678] [2022-04-06 18:05:02,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980445678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:05:02,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:05:02,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 20 [2022-04-06 18:05:02,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:05:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205680565] [2022-04-06 18:05:02,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205680565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:05:02,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:05:02,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:05:02,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882119674] [2022-04-06 18:05:02,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:05:02,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 18:05:02,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:05:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 18:05:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:05:02,745 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 18:05:06,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:08,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:10,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:05:11,074 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2022-04-06 18:05:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:05:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 62 [2022-04-06 18:05:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:05:11,075 INFO L225 Difference]: With dead ends: 97 [2022-04-06 18:05:11,075 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 18:05:11,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:05:11,076 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 17 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-04-06 18:05:11,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 145 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 364 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-04-06 18:05:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 18:05:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2022-04-06 18:05:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 18:05:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-04-06 18:05:11,131 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 62 [2022-04-06 18:05:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:05:11,132 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-04-06 18:05:11,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 18:05:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-04-06 18:05:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 18:05:11,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:05:11,135 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:05:11,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 18:05:11,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:05:11,352 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:05:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:05:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash 487516627, now seen corresponding path program 5 times [2022-04-06 18:05:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:05:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1595831778] [2022-04-06 18:05:11,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:05:11,352 INFO L85 PathProgramCache]: Analyzing trace with hash 487516627, now seen corresponding path program 6 times [2022-04-06 18:05:11,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:05:11,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618094136] [2022-04-06 18:05:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:05:11,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:05:11,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:05:11,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425014792] [2022-04-06 18:05:11,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:05:11,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:05:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:05:11,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:05:11,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 18:05:11,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 18:05:11,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:05:11,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 18:05:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:05:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 18:05:11,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:05:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 18:05:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:05:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618094136] [2022-04-06 18:05:11,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:05:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425014792] [2022-04-06 18:05:11,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425014792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:05:11,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:05:11,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 18:05:11,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:05:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1595831778] [2022-04-06 18:05:11,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1595831778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:05:11,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:05:11,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:05:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124345307] [2022-04-06 18:05:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:05:11,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:05:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:05:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:05:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:05:11,721 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:05:13,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:16,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 18:05:16,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:05:16,099 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-04-06 18:05:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:05:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-04-06 18:05:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:05:16,099 INFO L225 Difference]: With dead ends: 72 [2022-04-06 18:05:16,100 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:05:16,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:05:16,102 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:05:16,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 124 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 18:05:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:05:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:05:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 18:05:16,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:05:16,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-04-06 18:05:16,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:05:16,114 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:05:16,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 18:05:16,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:05:16,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:05:16,130 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:05:16,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 18:05:16,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 18:05:16,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:05:34,610 WARN L232 SmtUtils]: Spent 11.28s on a formula simplification. DAG size of input: 165 DAG size of output: 162 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:05:43,656 WARN L232 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:05:55,101 WARN L232 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 171 DAG size of output: 169 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 18:06:36,773 WARN L232 SmtUtils]: Spent 40.10s on a formula simplification. DAG size of input: 145 DAG size of output: 37 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:07:45,865 WARN L232 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 150 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:08:16,922 WARN L232 SmtUtils]: Spent 28.78s on a formula simplification. DAG size of input: 143 DAG size of output: 36 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:08:41,790 WARN L232 SmtUtils]: Spent 24.82s on a formula simplification. DAG size of input: 155 DAG size of output: 40 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:08:41,795 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-04-06 18:08:41,796 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-04-06 18:08:41,796 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-04-06 18:08:41,796 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50) (<= 1 main_~y~0)) [2022-04-06 18:08:41,796 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-04-06 18:08:41,796 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 60) the Hoare annotation is: true [2022-04-06 18:08:41,796 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 60) the Hoare annotation is: true [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-06 18:08:41,796 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-04-06 18:08:41,796 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 (+ (div (+ (- 2) main_~y~0) 2) 1)) (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= main_~x~0 50) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 50)) [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (<= main_~x~0 50) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0)) (<= 1 main_~b~0) (<= 1 main_~y~0))) [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse2 (<= main_~x~0 50)) (.cse3 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse3) (and .cse0 .cse1 .cse2 (<= 1 main_~b~0) .cse3))) [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0))) (.cse2 (<= main_~x~0 50)) (.cse3 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse3) (and .cse0 .cse1 .cse2 (<= 1 main_~b~0) .cse3))) [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 55) the Hoare annotation is: (let ((.cse5 (* main_~y~0 main_~x~0))) (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (or (= main_~q~0 .cse5) (and (= (mod (+ .cse5 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0))))) (.cse2 (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse5)) (.cse3 (<= main_~x~0 50)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 1 main_~b~0) .cse4) (and .cse0 .cse1 .cse2 .cse3 (not (= (mod (+ main_~a~0 1) 2) 0)) (<= 0 main_~b~0) .cse4)))) [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,797 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:08:41,798 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-04-06 18:08:41,798 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:08:41,798 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 18:08:41,798 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 18:08:41,798 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 18:08:41,798 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:08:41,805 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 18:08:41,807 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 18:08:41,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:41 BoogieIcfgContainer [2022-04-06 18:08:41,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 18:08:41,833 INFO L158 Benchmark]: Toolchain (without parser) took 267934.00ms. Allocated memory was 184.5MB in the beginning and 339.7MB in the end (delta: 155.2MB). Free memory was 135.7MB in the beginning and 181.3MB in the end (delta: -45.6MB). Peak memory consumption was 180.8MB. Max. memory is 8.0GB. [2022-04-06 18:08:41,833 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 184.5MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:08:41,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.96ms. Allocated memory was 184.5MB in the beginning and 235.9MB in the end (delta: 51.4MB). Free memory was 135.5MB in the beginning and 211.5MB in the end (delta: -76.0MB). Peak memory consumption was 15.1MB. Max. memory is 8.0GB. [2022-04-06 18:08:41,833 INFO L158 Benchmark]: Boogie Preprocessor took 19.68ms. Allocated memory is still 235.9MB. Free memory was 211.5MB in the beginning and 210.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 18:08:41,833 INFO L158 Benchmark]: RCFGBuilder took 206.44ms. Allocated memory is still 235.9MB. Free memory was 210.1MB in the beginning and 198.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 18:08:41,833 INFO L158 Benchmark]: TraceAbstraction took 267493.75ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 198.2MB in the beginning and 181.3MB in the end (delta: 16.9MB). Peak memory consumption was 192.0MB. Max. memory is 8.0GB. [2022-04-06 18:08:41,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 184.5MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.96ms. Allocated memory was 184.5MB in the beginning and 235.9MB in the end (delta: 51.4MB). Free memory was 135.5MB in the beginning and 211.5MB in the end (delta: -76.0MB). Peak memory consumption was 15.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.68ms. Allocated memory is still 235.9MB. Free memory was 211.5MB in the beginning and 210.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 206.44ms. Allocated memory is still 235.9MB. Free memory was 210.1MB in the beginning and 198.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 267493.75ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 198.2MB in the beginning and 181.3MB in the end (delta: 16.9MB). Peak memory consumption was 192.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 267.4s, OverallIterations: 16, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 43.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 205.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 435 SdHoareTripleChecker+Valid, 40.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 401 mSDsluCounter, 1904 SdHoareTripleChecker+Invalid, 39.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1499 mSDsCounter, 201 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2456 IncrementalHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 201 mSolverCounterUnsat, 405 mSDtfsCounter, 2456 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1406 GetRequests, 1158 SyntacticMatches, 15 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=15, InterpolantAutomatonStates: 162, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 119 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 218 PreInvPairs, 332 NumberOfFragments, 528 HoareAnnotationTreeSize, 218 FomulaSimplifications, 37903 FormulaSimplificationTreeSizeReduction, 38.7s HoareSimplificationTime, 34 FomulaSimplificationsInter, 721196 FormulaSimplificationTreeSizeReductionInter, 166.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((0 <= x && q + b * a * p == y * x) && x <= 50) && !((a + 1) % 2 == 0)) && 0 <= b) && 1 <= y) || ((((0 <= x && q + b * a * p == y * x) && x <= 50) && 1 <= b) && 1 <= y) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-06 18:08:41,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...