/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 09:17:45,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 09:17:45,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 09:17:45,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 09:17:45,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 09:17:45,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 09:17:45,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 09:17:45,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 09:17:45,445 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 09:17:45,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 09:17:45,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 09:17:45,447 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 09:17:45,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 09:17:45,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 09:17:45,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 09:17:45,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 09:17:45,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 09:17:45,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:17:45,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 09:17:45,449 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 09:17:45,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 09:17:45,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 09:17:45,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 09:17:45,654 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 09:17:45,656 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 09:17:45,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2022-03-19 09:17:45,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec30752/a7a814457332431484d91c0d7361584e/FLAG4f99a563a [2022-03-19 09:17:46,037 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 09:17:46,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound5.c [2022-03-19 09:17:46,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec30752/a7a814457332431484d91c0d7361584e/FLAG4f99a563a [2022-03-19 09:17:46,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ec30752/a7a814457332431484d91c0d7361584e [2022-03-19 09:17:46,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 09:17:46,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 09:17:46,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 09:17:46,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 09:17:46,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 09:17:46,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27899e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46, skipping insertion in model container [2022-03-19 09:17:46,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 09:17:46,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 09:17:46,198 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/bresenham-ll_valuebound5.c[597,610] [2022-03-19 09:17:46,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:17:46,216 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 09:17:46,223 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/bresenham-ll_valuebound5.c[597,610] [2022-03-19 09:17:46,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:17:46,237 INFO L208 MainTranslator]: Completed translation [2022-03-19 09:17:46,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46 WrapperNode [2022-03-19 09:17:46,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 09:17:46,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 09:17:46,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 09:17:46,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 09:17:46,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 09:17:46,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 09:17:46,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 09:17:46,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 09:17:46,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (1/1) ... [2022-03-19 09:17:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:17:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:46,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 09:17:46,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 09:17:46,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 09:17:46,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 09:17:46,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 09:17:46,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 09:17:46,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 09:17:46,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 09:17:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 09:17:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 09:17:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 09:17:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 09:17:46,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 09:17:46,367 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 09:17:46,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 09:17:46,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 09:17:46,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 09:17:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 09:17:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 09:17:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 09:17:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 09:17:46,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 09:17:46,411 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 09:17:46,412 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 09:17:46,541 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 09:17:46,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 09:17:46,546 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 09:17:46,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:17:46 BoogieIcfgContainer [2022-03-19 09:17:46,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 09:17:46,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 09:17:46,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 09:17:46,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 09:17:46,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:17:46" (1/3) ... [2022-03-19 09:17:46,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619920e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:17:46, skipping insertion in model container [2022-03-19 09:17:46,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:17:46" (2/3) ... [2022-03-19 09:17:46,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619920e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:17:46, skipping insertion in model container [2022-03-19 09:17:46,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:17:46" (3/3) ... [2022-03-19 09:17:46,552 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound5.c [2022-03-19 09:17:46,557 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 09:17:46,557 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 09:17:46,591 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 09:17:46,595 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 09:17:46,596 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 09:17:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 09:17:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 09:17:46,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:46,611 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:46,611 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-03-19 09:17:46,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:46,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149666261] [2022-03-19 09:17:46,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 2 times [2022-03-19 09:17:46,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:46,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794397957] [2022-03-19 09:17:46,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:46,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:17:46,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:17:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:17:46,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 09:17:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:17:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 09:17:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:17:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:17:46,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794397957] [2022-03-19 09:17:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794397957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:46,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:46,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:17:46,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149666261] [2022-03-19 09:17:46,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149666261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:46,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:46,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:17:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125427062] [2022-03-19 09:17:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:46,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 09:17:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 09:17:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:17:46,836 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 09:17:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:46,896 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-19 09:17:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 09:17:46,899 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-19 09:17:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:46,906 INFO L225 Difference]: With dead ends: 57 [2022-03-19 09:17:46,907 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 09:17:46,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:17:46,912 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:46,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:17:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 09:17:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 09:17:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 09:17:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-19 09:17:46,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-19 09:17:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:46,949 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-19 09:17:46,949 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 09:17:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-19 09:17:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 09:17:46,950 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:46,950 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:46,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 09:17:46,951 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-03-19 09:17:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:46,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798828253] [2022-03-19 09:17:46,955 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 2 times [2022-03-19 09:17:46,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:46,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658160667] [2022-03-19 09:17:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:46,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:46,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430307742] [2022-03-19 09:17:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:46,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:46,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:47,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:47,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 09:17:47,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 09:17:47,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 09:17:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:17:47,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:17:47,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658160667] [2022-03-19 09:17:47,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:47,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430307742] [2022-03-19 09:17:47,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430307742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:47,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:47,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:17:47,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:47,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798828253] [2022-03-19 09:17:47,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798828253] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:47,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:47,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 09:17:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433695000] [2022-03-19 09:17:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:47,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 09:17:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 09:17:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:17:47,199 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 09:17:47,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:47,254 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-19 09:17:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 09:17:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-19 09:17:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:47,255 INFO L225 Difference]: With dead ends: 39 [2022-03-19 09:17:47,256 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 09:17:47,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 09:17:47,257 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:47,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:17:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 09:17:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-19 09:17:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 09:17:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-19 09:17:47,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-19 09:17:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:47,264 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-19 09:17:47,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-19 09:17:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-19 09:17:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 09:17:47,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:47,265 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:47,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:47,482 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 [2022-03-19 09:17:47,482 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-03-19 09:17:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:47,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638906725] [2022-03-19 09:17:47,485 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:47,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 2 times [2022-03-19 09:17:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:47,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511744740] [2022-03-19 09:17:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:47,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:47,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787242409] [2022-03-19 09:17:47,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:47,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:47,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:47,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 09:17:47,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:17:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 09:17:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 09:17:47,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 09:17:47,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:47,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511744740] [2022-03-19 09:17:47,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:47,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787242409] [2022-03-19 09:17:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787242409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:47,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-19 09:17:47,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638906725] [2022-03-19 09:17:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638906725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:47,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 09:17:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716971839] [2022-03-19 09:17:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:47,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 09:17:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 09:17:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-19 09:17:47,903 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:17:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:48,046 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-03-19 09:17:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 09:17:48,046 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-19 09:17:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:48,047 INFO L225 Difference]: With dead ends: 48 [2022-03-19 09:17:48,047 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 09:17:48,047 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 09:17:48,048 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:48,048 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 129 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:17:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 09:17:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-19 09:17:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 09:17:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-19 09:17:48,055 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2022-03-19 09:17:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:48,056 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-19 09:17:48,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:17:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-19 09:17:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 09:17:48,056 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:48,057 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:48,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:48,273 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 [2022-03-19 09:17:48,274 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2022-03-19 09:17:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:48,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068099640] [2022-03-19 09:17:48,275 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 2 times [2022-03-19 09:17:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861882342] [2022-03-19 09:17:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:48,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599526878] [2022-03-19 09:17:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:48,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:48,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:48,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 09:17:48,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:17:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 09:17:48,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:17:48,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 09:17:48,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861882342] [2022-03-19 09:17:48,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599526878] [2022-03-19 09:17:48,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599526878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:48,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:48,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-19 09:17:48,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068099640] [2022-03-19 09:17:48,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068099640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:48,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:48,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 09:17:48,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792218921] [2022-03-19 09:17:48,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:48,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 09:17:48,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:48,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 09:17:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 09:17:48,569 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:17:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:48,663 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-03-19 09:17:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 09:17:48,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-03-19 09:17:48,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:48,664 INFO L225 Difference]: With dead ends: 56 [2022-03-19 09:17:48,664 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 09:17:48,665 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-19 09:17:48,665 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:48,666 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:17:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 09:17:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-03-19 09:17:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 09:17:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-19 09:17:48,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-03-19 09:17:48,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:48,689 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-19 09:17:48,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:17:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-19 09:17:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 09:17:48,690 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:48,691 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:48,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:48,907 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 [2022-03-19 09:17:48,908 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-03-19 09:17:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:48,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421717606] [2022-03-19 09:17:48,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:48,909 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 2 times [2022-03-19 09:17:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:48,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729809678] [2022-03-19 09:17:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:48,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:48,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144551575] [2022-03-19 09:17:48,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:48,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:48,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:48,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:48,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 09:17:48,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:17:48,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 09:17:48,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:49,166 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:17:49,169 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:17:49,171 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:17:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 09:17:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 09:17:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729809678] [2022-03-19 09:17:50,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144551575] [2022-03-19 09:17:50,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144551575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:50,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:50,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-19 09:17:50,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:50,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421717606] [2022-03-19 09:17:50,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421717606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:50,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:50,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 09:17:50,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019734619] [2022-03-19 09:17:50,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:50,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 09:17:50,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 09:17:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-19 09:17:50,075 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:52,410 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 [] [2022-03-19 09:17:54,429 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 [] [2022-03-19 09:17:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:54,496 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-19 09:17:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 09:17:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2022-03-19 09:17:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:54,497 INFO L225 Difference]: With dead ends: 61 [2022-03-19 09:17:54,497 INFO L226 Difference]: Without dead ends: 53 [2022-03-19 09:17:54,498 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-03-19 09:17:54,498 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:54,498 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 217 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-03-19 09:17:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-19 09:17:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-03-19 09:17:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 09:17:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-19 09:17:54,504 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2022-03-19 09:17:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:54,504 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-19 09:17:54,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-19 09:17:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 09:17:54,505 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:54,505 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:54,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:54,705 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 [2022-03-19 09:17:54,706 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 3 times [2022-03-19 09:17:54,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:54,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948998943] [2022-03-19 09:17:54,707 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 4 times [2022-03-19 09:17:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:54,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689635744] [2022-03-19 09:17:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:54,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:54,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:54,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865547840] [2022-03-19 09:17:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:17:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:54,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:54,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 09:17:54,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:17:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-19 09:17:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:55,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:17:55,339 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:17:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 09:17:55,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 09:17:55,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689635744] [2022-03-19 09:17:55,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865547840] [2022-03-19 09:17:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865547840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:55,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:55,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-19 09:17:55,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:55,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948998943] [2022-03-19 09:17:55,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948998943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:55,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 09:17:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410088783] [2022-03-19 09:17:55,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:55,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 09:17:55,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 09:17:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-19 09:17:55,771 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 09:17:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:56,222 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-03-19 09:17:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 09:17:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 09:17:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:56,223 INFO L225 Difference]: With dead ends: 81 [2022-03-19 09:17:56,223 INFO L226 Difference]: Without dead ends: 61 [2022-03-19 09:17:56,223 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-19 09:17:56,224 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 41 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:56,224 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 184 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:17:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-19 09:17:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-19 09:17:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 09:17:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-03-19 09:17:56,242 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2022-03-19 09:17:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:56,242 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-03-19 09:17:56,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 09:17:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-03-19 09:17:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 09:17:56,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:56,246 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:56,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:56,446 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 [2022-03-19 09:17:56,447 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 1 times [2022-03-19 09:17:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869950333] [2022-03-19 09:17:56,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 2 times [2022-03-19 09:17:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81236217] [2022-03-19 09:17:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:56,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:56,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28469742] [2022-03-19 09:17:56,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:56,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:56,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:56,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:17:56,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 09:17:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:17:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 09:17:56,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 09:17:56,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 09:17:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:57,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81236217] [2022-03-19 09:17:57,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28469742] [2022-03-19 09:17:57,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28469742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:57,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:57,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-19 09:17:57,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869950333] [2022-03-19 09:17:57,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869950333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:57,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:57,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 09:17:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916024611] [2022-03-19 09:17:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:57,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 09:17:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 09:17:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-19 09:17:57,186 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 09:17:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:57,419 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2022-03-19 09:17:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 09:17:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-19 09:17:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:57,420 INFO L225 Difference]: With dead ends: 83 [2022-03-19 09:17:57,420 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 09:17:57,420 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-19 09:17:57,421 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:57,421 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 177 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:17:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 09:17:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-19 09:17:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 09:17:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-03-19 09:17:57,431 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 41 [2022-03-19 09:17:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:57,432 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-03-19 09:17:57,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 09:17:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-03-19 09:17:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 09:17:57,432 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:57,432 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:57,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 09:17:57,653 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 [2022-03-19 09:17:57,654 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:57,654 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 3 times [2022-03-19 09:17:57,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195291889] [2022-03-19 09:17:57,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:57,655 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 4 times [2022-03-19 09:17:57,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:57,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539982113] [2022-03-19 09:17:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:57,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:57,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317276091] [2022-03-19 09:17:57,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:17:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:57,676 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) [2022-03-19 09:17:57,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 09:17:57,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:17:57,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 09:17:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 09:17:57,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 09:17:58,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:58,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539982113] [2022-03-19 09:17:58,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:58,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317276091] [2022-03-19 09:17:58,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317276091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:58,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:58,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-19 09:17:58,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:58,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195291889] [2022-03-19 09:17:58,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195291889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:58,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:58,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 09:17:58,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752562844] [2022-03-19 09:17:58,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:58,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 09:17:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 09:17:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-19 09:17:58,133 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:58,273 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-03-19 09:17:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 09:17:58,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-19 09:17:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:58,275 INFO L225 Difference]: With dead ends: 84 [2022-03-19 09:17:58,275 INFO L226 Difference]: Without dead ends: 82 [2022-03-19 09:17:58,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 09:17:58,275 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:58,276 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:17:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-19 09:17:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2022-03-19 09:17:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 09:17:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-03-19 09:17:58,302 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 41 [2022-03-19 09:17:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:58,303 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-03-19 09:17:58,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-03-19 09:17:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 09:17:58,303 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:58,303 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:58,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:58,520 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 [2022-03-19 09:17:58,520 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 3 times [2022-03-19 09:17:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:58,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627051599] [2022-03-19 09:17:58,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 4 times [2022-03-19 09:17:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:58,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364431340] [2022-03-19 09:17:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:58,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:58,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832365693] [2022-03-19 09:17:58,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:17:58,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:58,535 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) [2022-03-19 09:17:58,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 09:17:58,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:17:58,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 09:17:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 09:17:58,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-19 09:17:59,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364431340] [2022-03-19 09:17:59,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832365693] [2022-03-19 09:17:59,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832365693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:59,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:59,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-03-19 09:17:59,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627051599] [2022-03-19 09:17:59,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627051599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:59,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:59,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 09:17:59,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397950441] [2022-03-19 09:17:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:59,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 09:17:59,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:59,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 09:17:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-19 09:17:59,013 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:59,168 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-03-19 09:17:59,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 09:17:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-19 09:17:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:59,170 INFO L225 Difference]: With dead ends: 91 [2022-03-19 09:17:59,170 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 09:17:59,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-19 09:17:59,171 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:59,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 230 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:17:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 09:17:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-03-19 09:17:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 09:17:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-03-19 09:17:59,181 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 41 [2022-03-19 09:17:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:59,181 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-03-19 09:17:59,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:17:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-03-19 09:17:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 09:17:59,181 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:59,181 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:59,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 09:17:59,397 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 [2022-03-19 09:17:59,398 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:17:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:17:59,398 INFO L85 PathProgramCache]: Analyzing trace with hash -143142008, now seen corresponding path program 1 times [2022-03-19 09:17:59,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:59,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1036278363] [2022-03-19 09:17:59,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:17:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -143142008, now seen corresponding path program 2 times [2022-03-19 09:17:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:17:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671171741] [2022-03-19 09:17:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:17:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:17:59,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:17:59,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850385593] [2022-03-19 09:17:59,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:17:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:17:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:17:59,406 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) [2022-03-19 09:17:59,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 09:17:59,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:17:59,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:17:59,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 09:17:59,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:17:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:17:59,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:17:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:17:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:17:59,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671171741] [2022-03-19 09:17:59,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:17:59,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850385593] [2022-03-19 09:17:59,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850385593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:17:59,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:17:59,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 09:17:59,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:17:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1036278363] [2022-03-19 09:17:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1036278363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:17:59,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:17:59,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 09:17:59,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389411319] [2022-03-19 09:17:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:17:59,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 09:17:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:17:59,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 09:17:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 09:17:59,736 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:17:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:17:59,795 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-03-19 09:17:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:17:59,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-03-19 09:17:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:17:59,796 INFO L225 Difference]: With dead ends: 92 [2022-03-19 09:17:59,796 INFO L226 Difference]: Without dead ends: 84 [2022-03-19 09:17:59,796 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-19 09:17:59,797 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:17:59,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:17:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-19 09:17:59,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2022-03-19 09:17:59,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 61 states have internal predecessors, (65), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 09:17:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-03-19 09:17:59,807 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 48 [2022-03-19 09:17:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:17:59,808 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-03-19 09:17:59,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:17:59,813 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-03-19 09:17:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-19 09:17:59,813 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:17:59,813 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:17:59,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:00,030 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 [2022-03-19 09:18:00,030 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 3 times [2022-03-19 09:18:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:00,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [848785507] [2022-03-19 09:18:00,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 4 times [2022-03-19 09:18:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:00,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811965791] [2022-03-19 09:18:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:00,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:00,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:00,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949150593] [2022-03-19 09:18:00,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:18:00,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:00,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:00,038 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) [2022-03-19 09:18:00,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 09:18:00,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:18:00,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 09:18:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 09:18:00,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 09:18:00,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811965791] [2022-03-19 09:18:00,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949150593] [2022-03-19 09:18:00,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949150593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:00,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:00,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-03-19 09:18:00,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [848785507] [2022-03-19 09:18:00,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [848785507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:00,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:00,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 09:18:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122687104] [2022-03-19 09:18:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:00,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 09:18:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:00,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 09:18:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-19 09:18:00,961 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:01,223 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-03-19 09:18:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 09:18:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-03-19 09:18:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:01,224 INFO L225 Difference]: With dead ends: 96 [2022-03-19 09:18:01,224 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 09:18:01,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-03-19 09:18:01,225 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:01,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 258 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:18:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 09:18:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-03-19 09:18:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 09:18:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2022-03-19 09:18:01,235 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 48 [2022-03-19 09:18:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:01,235 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2022-03-19 09:18:01,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2022-03-19 09:18:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:01,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:01,236 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:01,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:01,451 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 [2022-03-19 09:18:01,451 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 5 times [2022-03-19 09:18:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:01,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429552175] [2022-03-19 09:18:01,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:01,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 6 times [2022-03-19 09:18:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089320861] [2022-03-19 09:18:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:01,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502090610] [2022-03-19 09:18:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:18:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:01,460 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) [2022-03-19 09:18:01,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 09:18:01,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 09:18:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-19 09:18:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:01,671 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:02,120 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 09:18:02,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 09:18:02,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089320861] [2022-03-19 09:18:02,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:02,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502090610] [2022-03-19 09:18:02,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502090610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:02,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 27 [2022-03-19 09:18:02,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:02,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429552175] [2022-03-19 09:18:02,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429552175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:02,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 09:18:02,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584588910] [2022-03-19 09:18:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:02,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 09:18:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 09:18:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-19 09:18:02,559 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 20 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 09:18:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:02,962 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-03-19 09:18:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 09:18:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 20 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-19 09:18:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:02,963 INFO L225 Difference]: With dead ends: 101 [2022-03-19 09:18:02,963 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 09:18:02,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 09:18:02,964 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:02,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 151 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:18:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 09:18:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2022-03-19 09:18:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 09:18:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2022-03-19 09:18:02,976 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 50 [2022-03-19 09:18:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:02,977 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2022-03-19 09:18:02,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 20 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 09:18:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2022-03-19 09:18:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:02,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:02,977 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:02,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:03,178 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 [2022-03-19 09:18:03,178 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 7 times [2022-03-19 09:18:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:03,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [428543806] [2022-03-19 09:18:03,179 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:03,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 8 times [2022-03-19 09:18:03,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:03,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555402519] [2022-03-19 09:18:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:03,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:03,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:03,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002961610] [2022-03-19 09:18:03,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:18:03,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:03,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:03,217 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) [2022-03-19 09:18:03,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 09:18:03,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:18:03,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:03,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 09:18:03,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:03,472 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:03,474 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:03,477 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 09:18:04,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 09:18:05,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555402519] [2022-03-19 09:18:05,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002961610] [2022-03-19 09:18:05,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002961610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:05,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:05,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-03-19 09:18:05,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:05,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [428543806] [2022-03-19 09:18:05,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [428543806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:05,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:05,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 09:18:05,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513566609] [2022-03-19 09:18:05,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:05,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 09:18:05,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 09:18:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-19 09:18:05,087 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:07,193 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 [] [2022-03-19 09:18:09,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:18:11,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:18:13,620 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 [] [2022-03-19 09:18:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:17,652 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-19 09:18:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 09:18:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-19 09:18:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:17,653 INFO L225 Difference]: With dead ends: 97 [2022-03-19 09:18:17,653 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 09:18:17,654 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-19 09:18:17,654 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:17,654 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 260 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 4 Unknown, 0 Unchecked, 9.5s Time] [2022-03-19 09:18:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 09:18:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-03-19 09:18:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 68 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 09:18:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-03-19 09:18:17,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 50 [2022-03-19 09:18:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:17,689 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-03-19 09:18:17,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:17,689 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-03-19 09:18:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:17,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:17,692 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:17,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:17,909 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 [2022-03-19 09:18:17,909 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:17,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:17,910 INFO L85 PathProgramCache]: Analyzing trace with hash -322489421, now seen corresponding path program 9 times [2022-03-19 09:18:17,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:17,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [408718646] [2022-03-19 09:18:17,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -322489421, now seen corresponding path program 10 times [2022-03-19 09:18:17,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:17,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073713427] [2022-03-19 09:18:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:17,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018426019] [2022-03-19 09:18:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:18:17,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:17,940 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) [2022-03-19 09:18:17,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 09:18:17,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:18:17,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 09:18:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:18:18,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:18:18,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:18,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073713427] [2022-03-19 09:18:18,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:18,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018426019] [2022-03-19 09:18:18,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018426019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:18,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:18,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-03-19 09:18:18,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:18,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [408718646] [2022-03-19 09:18:18,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [408718646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:18,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:18,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:18:18,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297735390] [2022-03-19 09:18:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:18,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:18:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:18,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:18:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:18:18,163 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:18,218 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-03-19 09:18:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 09:18:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-19 09:18:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:18,219 INFO L225 Difference]: With dead ends: 109 [2022-03-19 09:18:18,219 INFO L226 Difference]: Without dead ends: 96 [2022-03-19 09:18:18,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-19 09:18:18,220 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:18,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:18:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-19 09:18:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-03-19 09:18:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 72 states have internal predecessors, (76), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:18:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-03-19 09:18:18,237 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 50 [2022-03-19 09:18:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:18,237 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-03-19 09:18:18,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-03-19 09:18:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:18,239 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:18,239 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:18,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:18,474 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 [2022-03-19 09:18:18,474 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 11 times [2022-03-19 09:18:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:18,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [692239742] [2022-03-19 09:18:18,475 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 12 times [2022-03-19 09:18:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:18,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376731917] [2022-03-19 09:18:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:18,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:18,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430811775] [2022-03-19 09:18:18,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:18:18,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:18,496 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) [2022-03-19 09:18:18,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 09:18:18,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 09:18:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:18,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 09:18:18,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 09:18:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 09:18:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376731917] [2022-03-19 09:18:19,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430811775] [2022-03-19 09:18:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430811775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:19,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:19,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-03-19 09:18:19,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [692239742] [2022-03-19 09:18:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [692239742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:19,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:19,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 09:18:19,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864293081] [2022-03-19 09:18:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:19,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 09:18:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 09:18:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-19 09:18:19,150 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:19,431 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-03-19 09:18:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 09:18:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-19 09:18:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:19,432 INFO L225 Difference]: With dead ends: 109 [2022-03-19 09:18:19,432 INFO L226 Difference]: Without dead ends: 107 [2022-03-19 09:18:19,433 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-19 09:18:19,433 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:19,433 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 291 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:18:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-19 09:18:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-03-19 09:18:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 72 states have internal predecessors, (76), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:18:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-03-19 09:18:19,455 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 50 [2022-03-19 09:18:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:19,455 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-03-19 09:18:19,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-03-19 09:18:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:19,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:19,456 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:19,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:19,689 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 [2022-03-19 09:18:19,689 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 13 times [2022-03-19 09:18:19,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:19,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237858931] [2022-03-19 09:18:19,691 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 14 times [2022-03-19 09:18:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:19,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042604108] [2022-03-19 09:18:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:19,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698194206] [2022-03-19 09:18:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:18:19,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:19,706 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) [2022-03-19 09:18:19,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 09:18:19,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:18:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 09:18:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:19,914 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:19,915 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:19,917 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:19,922 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:19,924 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 09:18:21,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-19 09:18:22,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042604108] [2022-03-19 09:18:22,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698194206] [2022-03-19 09:18:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698194206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:22,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:22,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-19 09:18:22,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:22,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237858931] [2022-03-19 09:18:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237858931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:22,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:22,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 09:18:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294015733] [2022-03-19 09:18:22,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:22,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 09:18:22,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:22,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 09:18:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-19 09:18:22,296 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:26,988 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-03-19 09:18:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 09:18:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-19 09:18:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:26,989 INFO L225 Difference]: With dead ends: 110 [2022-03-19 09:18:26,989 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 09:18:26,990 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=77, Invalid=428, Unknown=1, NotChecked=0, Total=506 [2022-03-19 09:18:26,990 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:26,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 308 Invalid, 0 Unknown, 35 Unchecked, 0.9s Time] [2022-03-19 09:18:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 09:18:27,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-03-19 09:18:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 73 states have internal predecessors, (78), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:18:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-03-19 09:18:27,024 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 50 [2022-03-19 09:18:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:27,024 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-03-19 09:18:27,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:27,025 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-03-19 09:18:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:18:27,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:27,025 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:27,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:27,242 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 [2022-03-19 09:18:27,242 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 5 times [2022-03-19 09:18:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [964429081] [2022-03-19 09:18:27,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:27,243 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 6 times [2022-03-19 09:18:27,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:27,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914288052] [2022-03-19 09:18:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:27,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446345624] [2022-03-19 09:18:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:18:27,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:27,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:27,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:18:27,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 09:18:27,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 09:18:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 09:18:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:18:27,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:18:27,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914288052] [2022-03-19 09:18:27,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446345624] [2022-03-19 09:18:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446345624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:27,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-03-19 09:18:27,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:27,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [964429081] [2022-03-19 09:18:27,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [964429081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:27,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:27,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 09:18:27,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906556831] [2022-03-19 09:18:27,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:27,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 09:18:27,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:27,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 09:18:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-19 09:18:27,872 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:28,132 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-03-19 09:18:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 09:18:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-03-19 09:18:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:28,133 INFO L225 Difference]: With dead ends: 110 [2022-03-19 09:18:28,133 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 09:18:28,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-03-19 09:18:28,134 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:28,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 291 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 09:18:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 09:18:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2022-03-19 09:18:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 73 states have internal predecessors, (78), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:18:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-03-19 09:18:28,166 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 50 [2022-03-19 09:18:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:28,166 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-03-19 09:18:28,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-03-19 09:18:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 09:18:28,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:28,170 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:28,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:28,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 09:18:28,402 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 3 times [2022-03-19 09:18:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679761065] [2022-03-19 09:18:28,403 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 4 times [2022-03-19 09:18:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873428481] [2022-03-19 09:18:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:28,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517053601] [2022-03-19 09:18:28,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:18:28,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:28,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:28,409 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:18:28,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 09:18:28,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:18:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:28,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 09:18:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 09:18:28,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 09:18:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873428481] [2022-03-19 09:18:28,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517053601] [2022-03-19 09:18:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517053601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:28,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:28,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 09:18:28,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:28,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679761065] [2022-03-19 09:18:28,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679761065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:28,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:28,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:18:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879369636] [2022-03-19 09:18:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:28,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 09:18:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 09:18:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 09:18:28,759 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:18:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:18:28,855 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2022-03-19 09:18:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 09:18:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-03-19 09:18:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:18:28,856 INFO L225 Difference]: With dead ends: 111 [2022-03-19 09:18:28,856 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 09:18:28,856 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-19 09:18:28,856 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:18:28,856 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:18:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 09:18:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-03-19 09:18:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 76 states have internal predecessors, (81), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 09:18:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-19 09:18:28,878 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 57 [2022-03-19 09:18:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:18:28,878 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-19 09:18:28,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:18:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-19 09:18:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 09:18:28,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:18:28,879 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:18:28,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 09:18:29,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 09:18:29,097 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:18:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:18:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 5 times [2022-03-19 09:18:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40659412] [2022-03-19 09:18:29,099 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:18:29,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 6 times [2022-03-19 09:18:29,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:18:29,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082217401] [2022-03-19 09:18:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:18:29,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:18:29,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:18:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853930046] [2022-03-19 09:18:29,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:18:29,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:18:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:18:29,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:18:29,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 09:18:29,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 09:18:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:18:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 09:18:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:18:29,304 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:29,306 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:29,307 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:18:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-19 09:18:48,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:18:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 09:18:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:18:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082217401] [2022-03-19 09:18:49,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:18:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853930046] [2022-03-19 09:18:49,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853930046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:18:49,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:18:49,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-19 09:18:49,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:18:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40659412] [2022-03-19 09:18:49,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40659412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:18:49,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:18:49,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 09:18:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416470173] [2022-03-19 09:18:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:18:49,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 09:18:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:18:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 09:18:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-19 09:18:49,541 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:18:51,729 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 [] [2022-03-19 09:18:58,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:18:59,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:19:02,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:19:04,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:19:05,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:19:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:19:05,472 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2022-03-19 09:19:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 09:19:05,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-03-19 09:19:05,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:19:05,473 INFO L225 Difference]: With dead ends: 126 [2022-03-19 09:19:05,473 INFO L226 Difference]: Without dead ends: 118 [2022-03-19 09:19:05,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-19 09:19:05,474 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 12 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-03-19 09:19:05,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 237 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 300 Invalid, 4 Unknown, 0 Unchecked, 13.4s Time] [2022-03-19 09:19:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-19 09:19:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2022-03-19 09:19:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 09:19:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2022-03-19 09:19:05,499 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 57 [2022-03-19 09:19:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:19:05,499 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2022-03-19 09:19:05,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:19:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2022-03-19 09:19:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-19 09:19:05,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:19:05,500 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:19:05,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 09:19:05,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:19:05,706 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:19:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:19:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 5 times [2022-03-19 09:19:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:19:05,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288628947] [2022-03-19 09:19:05,707 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:19:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 6 times [2022-03-19 09:19:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:19:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426931729] [2022-03-19 09:19:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:19:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:19:05,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:19:05,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105234691] [2022-03-19 09:19:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:19:05,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:19:05,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:19:05,730 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:19:05,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 09:19:05,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 09:19:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:19:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 09:19:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:19:06,328 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:06,331 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:06,332 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 09:19:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:19:07,854 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:09,313 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 09:19:32,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:19:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426931729] [2022-03-19 09:19:32,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:19:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105234691] [2022-03-19 09:19:32,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105234691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:19:32,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:19:32,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2022-03-19 09:19:32,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:19:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288628947] [2022-03-19 09:19:32,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288628947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:19:32,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:19:32,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 09:19:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780413706] [2022-03-19 09:19:32,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:19:32,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 09:19:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:19:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 09:19:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=543, Unknown=5, NotChecked=0, Total=650 [2022-03-19 09:19:32,798 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 09:19:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:19:42,404 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2022-03-19 09:19:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 09:19:42,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2022-03-19 09:19:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:19:42,405 INFO L225 Difference]: With dead ends: 123 [2022-03-19 09:19:42,405 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 09:19:42,406 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=249, Invalid=1152, Unknown=5, NotChecked=0, Total=1406 [2022-03-19 09:19:42,406 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-19 09:19:42,406 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 89 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-19 09:19:42,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 09:19:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2022-03-19 09:19:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 71 states have internal predecessors, (76), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:19:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-03-19 09:19:42,438 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 57 [2022-03-19 09:19:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:19:42,439 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-03-19 09:19:42,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-19 09:19:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-03-19 09:19:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 09:19:42,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:19:42,439 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:19:42,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 09:19:42,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:19:42,642 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:19:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:19:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 15 times [2022-03-19 09:19:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:19:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219023786] [2022-03-19 09:19:42,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:19:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 16 times [2022-03-19 09:19:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:19:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401508680] [2022-03-19 09:19:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:19:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:19:42,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:19:42,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104703397] [2022-03-19 09:19:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:19:42,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:19:42,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:19:42,654 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:19:42,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 09:19:42,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:19:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:19:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-19 09:19:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:19:48,245 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:48,246 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:48,247 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:48,250 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:19:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:19:57,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:20:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 09:20:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:20:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401508680] [2022-03-19 09:20:00,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:20:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104703397] [2022-03-19 09:20:00,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104703397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:20:00,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:20:00,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 27 [2022-03-19 09:20:00,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:20:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219023786] [2022-03-19 09:20:00,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219023786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:20:00,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:20:00,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 09:20:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039265034] [2022-03-19 09:20:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:20:00,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 09:20:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:20:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 09:20:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-19 09:20:00,652 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 09:20:03,271 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 [] [2022-03-19 09:20:05,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:20:08,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:20:21,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:20:21,015 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-03-19 09:20:21,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 09:20:21,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 09:20:21,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:20:21,016 INFO L225 Difference]: With dead ends: 107 [2022-03-19 09:20:21,017 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 09:20:21,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 09:20:21,017 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-03-19 09:20:21,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 178 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 396 Invalid, 2 Unknown, 40 Unchecked, 10.8s Time] [2022-03-19 09:20:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 09:20:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-19 09:20:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 60 states have internal predecessors, (64), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 09:20:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-03-19 09:20:21,036 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 59 [2022-03-19 09:20:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:20:21,036 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-03-19 09:20:21,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 09:20:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-03-19 09:20:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 09:20:21,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:20:21,037 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:20:21,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 09:20:21,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 09:20:21,245 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:20:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:20:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 17 times [2022-03-19 09:20:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:20:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880722514] [2022-03-19 09:20:21,246 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:20:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 18 times [2022-03-19 09:20:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:20:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545095933] [2022-03-19 09:20:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:20:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:20:21,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:20:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908411007] [2022-03-19 09:20:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:20:21,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:20:21,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:20:21,255 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:20:21,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 09:20:21,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 09:20:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:20:21,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 09:20:21,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:20:38,639 WARN L232 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:20:53,129 WARN L232 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:21:04,796 WARN L232 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:21:04,804 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:21:04,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:21:04,809 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:21:04,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:21:15,335 WARN L855 $PredicateComparison]: unable to prove that (and (let ((.cse1 (= c_main_~Y~0 0))) (let ((.cse3 (not .cse1)) (.cse2 (= c_main_~yx~0 0)) (.cse4 (* c_main_~Y~0 4)) (.cse0 (= c_main_~X~0 0))) (or (and .cse0 (or (and .cse1 .cse2) (and (= (mod c_main_~yx~0 c_main_~Y~0) 0) .cse3 (= .cse4 (+ (* (div c_main_~yx~0 c_main_~Y~0) c_main_~Y~0) c_main_~X~0)))) (= c_main_~xy~0 0)) (let ((.cse6 (* (div c_main_~xy~0 c_main_~X~0) c_main_~X~0))) (and (let ((.cse5 (+ .cse4 .cse6 (* (- 1) c_main_~X~0)))) (or (and (= (mod .cse5 c_main_~Y~0) 0) .cse3 (= c_main_~yx~0 (* c_main_~Y~0 (div .cse5 c_main_~Y~0)))) (and (= .cse5 0) .cse2))) (not .cse0) (let ((.cse7 (+ (* (- 1) c_main_~Y~0) .cse6 (div (+ (* 2 c_main_~X~0) (* c_main_~Y~0 (- 6))) (- 2))))) (or (= .cse7 0) (= (mod .cse7 c_main_~Y~0) 0))) (= (mod c_main_~xy~0 c_main_~X~0) 0)))))) (= c_main_~v~0 (+ (* c_main_~Y~0 10) (* (- 3) c_main_~X~0)))) is different from true [2022-03-19 09:21:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 19 trivial. 4 not checked. [2022-03-19 09:21:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:21:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 09:21:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:21:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545095933] [2022-03-19 09:21:19,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:21:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908411007] [2022-03-19 09:21:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908411007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:21:19,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:21:19,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 24 [2022-03-19 09:21:19,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:21:19,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880722514] [2022-03-19 09:21:19,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880722514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:21:19,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:21:19,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 09:21:19,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076319026] [2022-03-19 09:21:19,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:21:19,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 09:21:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:21:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 09:21:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=447, Unknown=1, NotChecked=42, Total=552 [2022-03-19 09:21:19,206 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:21:21,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:26,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:27,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:32,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:35,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:37,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:53,460 WARN L232 SmtUtils]: Spent 14.62s on a formula simplification. DAG size of input: 43 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:21:55,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:21:58,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:22:15,805 WARN L232 SmtUtils]: Spent 17.09s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:22:19,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:22:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:22:19,448 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-19 09:22:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 09:22:19,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-19 09:22:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:22:19,452 INFO L225 Difference]: With dead ends: 97 [2022-03-19 09:22:19,452 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 09:22:19,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=99, Invalid=716, Unknown=1, NotChecked=54, Total=870 [2022-03-19 09:22:19,453 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 8 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:22:19,453 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 298 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 383 Invalid, 5 Unknown, 50 Unchecked, 23.9s Time] [2022-03-19 09:22:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 09:22:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-03-19 09:22:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.088235294117647) internal successors, (74), 70 states have internal predecessors, (74), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:22:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-03-19 09:22:19,477 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 59 [2022-03-19 09:22:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:22:19,477 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-03-19 09:22:19,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:22:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-03-19 09:22:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 09:22:19,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:22:19,479 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:22:19,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 09:22:19,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 09:22:19,696 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:22:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:22:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 19 times [2022-03-19 09:22:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:22:19,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355087606] [2022-03-19 09:22:19,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:22:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 20 times [2022-03-19 09:22:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:22:19,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854998463] [2022-03-19 09:22:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:22:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:22:19,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:22:19,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775095664] [2022-03-19 09:22:19,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:22:19,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:22:19,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:22:19,705 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:22:19,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 09:22:19,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:22:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:22:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 09:22:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:22:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 09:22:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:22:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 09:22:28,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:22:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854998463] [2022-03-19 09:22:28,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:22:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775095664] [2022-03-19 09:22:28,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775095664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:22:28,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:22:28,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-03-19 09:22:28,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:22:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355087606] [2022-03-19 09:22:28,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355087606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:22:28,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:22:28,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 09:22:28,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572223144] [2022-03-19 09:22:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:22:28,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 09:22:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:22:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 09:22:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-19 09:22:28,924 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 09:22:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:22:33,573 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-03-19 09:22:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 09:22:33,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-19 09:22:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:22:33,574 INFO L225 Difference]: With dead ends: 117 [2022-03-19 09:22:33,574 INFO L226 Difference]: Without dead ends: 106 [2022-03-19 09:22:33,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-19 09:22:33,575 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:22:33,575 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 148 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-19 09:22:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-19 09:22:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2022-03-19 09:22:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.082191780821918) internal successors, (79), 74 states have internal predecessors, (79), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 09:22:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-03-19 09:22:33,596 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 59 [2022-03-19 09:22:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:22:33,597 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-03-19 09:22:33,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-19 09:22:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-03-19 09:22:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 09:22:33,597 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:22:33,597 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:22:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 09:22:33,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:22:33,812 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:22:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:22:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 21 times [2022-03-19 09:22:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:22:33,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113679953] [2022-03-19 09:22:33,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:22:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 22 times [2022-03-19 09:22:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:22:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858982294] [2022-03-19 09:22:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:22:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:22:33,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:22:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520028048] [2022-03-19 09:22:33,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:22:33,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:22:33,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:22:33,831 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:22:33,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 09:22:33,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:22:33,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:22:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 09:22:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:22:36,777 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:22:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 09:22:41,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:22:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-19 09:22:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:22:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858982294] [2022-03-19 09:22:44,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:22:44,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520028048] [2022-03-19 09:22:44,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520028048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:22:44,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:22:44,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-19 09:22:44,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:22:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113679953] [2022-03-19 09:22:44,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113679953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:22:44,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:22:44,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 09:22:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453126776] [2022-03-19 09:22:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:22:44,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 09:22:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:22:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 09:22:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=442, Unknown=2, NotChecked=0, Total=506 [2022-03-19 09:22:44,694 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:22:50,160 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:22:54,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:22:56,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:03,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:23:03,326 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-03-19 09:23:03,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 09:23:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-03-19 09:23:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:23:03,327 INFO L225 Difference]: With dead ends: 116 [2022-03-19 09:23:03,327 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 09:23:03,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=110, Invalid=700, Unknown=2, NotChecked=0, Total=812 [2022-03-19 09:23:03,328 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-03-19 09:23:03,328 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 289 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 487 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-03-19 09:23:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 09:23:03,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-03-19 09:23:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 84 states have internal predecessors, (89), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 09:23:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2022-03-19 09:23:03,365 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 59 [2022-03-19 09:23:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:23:03,365 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2022-03-19 09:23:03,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-03-19 09:23:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2022-03-19 09:23:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 09:23:03,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:23:03,366 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:23:03,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 09:23:03,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:23:03,568 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:23:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:23:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -499243281, now seen corresponding path program 23 times [2022-03-19 09:23:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:23:03,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1477227878] [2022-03-19 09:23:03,569 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:23:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash -499243281, now seen corresponding path program 24 times [2022-03-19 09:23:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:23:03,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632410987] [2022-03-19 09:23:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:23:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:23:03,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:23:03,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298463951] [2022-03-19 09:23:03,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:23:03,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:23:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:23:03,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:23:03,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 09:23:03,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 09:23:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:23:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 09:23:03,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:23:04,900 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:23:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 09:23:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:23:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 09:23:07,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:23:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632410987] [2022-03-19 09:23:07,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:23:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298463951] [2022-03-19 09:23:07,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298463951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:23:07,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:23:07,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-19 09:23:07,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:23:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1477227878] [2022-03-19 09:23:07,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1477227878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:23:07,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:23:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 09:23:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121538620] [2022-03-19 09:23:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:23:07,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 09:23:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:23:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 09:23:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-19 09:23:07,855 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:23:10,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:14,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:16,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:21,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 09:23:39,973 WARN L232 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 47 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:23:40,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:23:40,568 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-03-19 09:23:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 09:23:40,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 68 [2022-03-19 09:23:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:23:40,569 INFO L225 Difference]: With dead ends: 130 [2022-03-19 09:23:40,569 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 09:23:40,570 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=80, Invalid=380, Unknown=2, NotChecked=0, Total=462 [2022-03-19 09:23:40,571 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-03-19 09:23:40,571 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 212 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2022-03-19 09:23:40,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 09:23:40,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2022-03-19 09:23:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 91 states have internal predecessors, (98), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 09:23:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2022-03-19 09:23:40,609 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 68 [2022-03-19 09:23:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:23:40,609 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2022-03-19 09:23:40,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-19 09:23:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2022-03-19 09:23:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 09:23:40,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:23:40,612 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:23:40,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 09:23:40,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 09:23:40,814 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:23:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:23:40,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1275764081, now seen corresponding path program 25 times [2022-03-19 09:23:40,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:23:40,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [130873579] [2022-03-19 09:23:40,815 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:23:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1275764081, now seen corresponding path program 26 times [2022-03-19 09:23:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:23:40,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967599448] [2022-03-19 09:23:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:23:40,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:23:40,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:23:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526277525] [2022-03-19 09:23:40,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:23:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:23:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:23:40,829 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:23:40,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 09:23:40,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:23:40,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:23:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 09:23:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:23:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-19 09:23:44,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:23:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-19 09:23:48,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:23:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967599448] [2022-03-19 09:23:48,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:23:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526277525] [2022-03-19 09:23:48,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526277525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:23:48,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:23:48,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-03-19 09:23:48,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:23:48,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [130873579] [2022-03-19 09:23:48,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [130873579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:23:48,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:23:48,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 09:23:48,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036984828] [2022-03-19 09:23:48,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:23:48,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 09:23:48,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:23:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 09:23:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-03-19 09:23:48,499 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 09:23:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:23:50,796 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-03-19 09:23:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 09:23:50,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-19 09:23:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:23:50,797 INFO L225 Difference]: With dead ends: 137 [2022-03-19 09:23:50,797 INFO L226 Difference]: Without dead ends: 126 [2022-03-19 09:23:50,797 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-19 09:23:50,798 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:23:50,798 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 135 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 259 Invalid, 0 Unknown, 40 Unchecked, 1.9s Time] [2022-03-19 09:23:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-19 09:23:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-03-19 09:23:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 17 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 09:23:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2022-03-19 09:23:50,838 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 68 [2022-03-19 09:23:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:23:50,838 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2022-03-19 09:23:50,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 09:23:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2022-03-19 09:23:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 09:23:50,839 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:23:50,839 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:23:50,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 09:23:51,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 09:23:51,055 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:23:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:23:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1520311635, now seen corresponding path program 27 times [2022-03-19 09:23:51,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:23:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751183693] [2022-03-19 09:23:51,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:23:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1520311635, now seen corresponding path program 28 times [2022-03-19 09:23:51,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:23:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385178715] [2022-03-19 09:23:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:23:51,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:23:51,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:23:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947701876] [2022-03-19 09:23:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:23:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:23:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:23:51,070 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:23:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 09:23:51,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:23:51,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:23:51,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-19 09:23:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:23:59,104 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:24:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-19 09:24:14,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:24:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 09:24:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:24:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385178715] [2022-03-19 09:24:17,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:24:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947701876] [2022-03-19 09:24:17,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947701876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:24:17,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:24:17,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 32 [2022-03-19 09:24:17,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:24:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751183693] [2022-03-19 09:24:17,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751183693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:24:17,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:24:17,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 09:24:17,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302522736] [2022-03-19 09:24:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:24:17,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 09:24:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:24:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 09:24:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=887, Unknown=1, NotChecked=0, Total=992 [2022-03-19 09:24:17,773 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 26 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 09:24:27,536 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 [] [2022-03-19 09:24:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:24:29,778 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2022-03-19 09:24:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 09:24:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 26 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-19 09:24:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:24:29,780 INFO L225 Difference]: With dead ends: 137 [2022-03-19 09:24:29,780 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 09:24:29,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=153, Invalid=1328, Unknown=1, NotChecked=0, Total=1482 [2022-03-19 09:24:29,781 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:24:29,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 308 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 773 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2022-03-19 09:24:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 09:24:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2022-03-19 09:24:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 17 states have call successors, (17), 15 states have call predecessors, (17), 14 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 09:24:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2022-03-19 09:24:29,813 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 68 [2022-03-19 09:24:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:24:29,813 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2022-03-19 09:24:29,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 26 states have internal predecessors, (38), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-19 09:24:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2022-03-19 09:24:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 09:24:29,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:24:29,814 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:24:29,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 09:24:30,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 09:24:30,027 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:24:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:24:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 987895349, now seen corresponding path program 29 times [2022-03-19 09:24:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:24:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061881757] [2022-03-19 09:24:30,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:24:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 987895349, now seen corresponding path program 30 times [2022-03-19 09:24:30,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:24:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000576967] [2022-03-19 09:24:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:24:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:24:30,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:24:30,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168559922] [2022-03-19 09:24:30,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:24:30,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:24:30,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:24:30,034 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:24:30,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 09:24:30,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 09:24:30,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:24:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 09:24:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:24:30,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:24:30,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:24:30,651 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:24:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 09:24:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:24:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 09:24:35,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:24:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000576967] [2022-03-19 09:24:35,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:24:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168559922] [2022-03-19 09:24:35,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168559922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:24:35,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:24:35,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-03-19 09:24:35,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:24:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061881757] [2022-03-19 09:24:35,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061881757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:24:35,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:24:35,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 09:24:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007935928] [2022-03-19 09:24:35,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:24:35,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 09:24:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:24:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 09:24:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2022-03-19 09:24:35,929 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 09:25:07,438 WARN L232 SmtUtils]: Spent 31.14s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 09:25:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:25:07,925 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-03-19 09:25:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:25:07,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-03-19 09:25:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:25:07,926 INFO L225 Difference]: With dead ends: 126 [2022-03-19 09:25:07,926 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 09:25:07,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2022-03-19 09:25:07,929 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 09:25:07,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 119 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 12 Unchecked, 0.5s Time] [2022-03-19 09:25:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 09:25:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 09:25:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 09:25:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 09:25:07,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-03-19 09:25:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:25:07,930 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 09:25:07,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 09:25:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 09:25:07,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 09:25:07,932 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 09:25:07,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 09:25:08,146 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 09:25:08,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 09:27:04,268 WARN L232 SmtUtils]: Spent 1.93m on a formula simplification. DAG size of input: 347 DAG size of output: 326 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-19 09:28:30,805 WARN L232 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 282 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 09:29:52,463 WARN L232 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 341 DAG size of output: 52 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 09:31:01,379 WARN L232 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 281 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 09:31:08,385 WARN L232 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 188 DAG size of output: 99 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 09:31:08,693 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2022-03-19 09:31:08,693 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2022-03-19 09:31:08,693 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2022-03-19 09:31:08,693 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-19 09:31:08,693 INFO L878 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 09:31:08,693 INFO L878 garLoopResultBuilder]: At program point L11-2(lines 10 12) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 09:31:08,693 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 10 12) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 09:31:08,693 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 5)) [2022-03-19 09:31:08,693 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~X~0 5) (<= main_~Y~0 5)) [2022-03-19 09:31:08,693 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-19 09:31:08,693 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 21 53) the Hoare annotation is: true [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 0 main_~X~0) (<= main_~X~0 5)) [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse8 (+ main_~X~0 main_~v~0))) (let ((.cse5 (* main_~X~0 main_~y~0)) (.cse20 (div .cse8 2))) (let ((.cse13 (+ .cse5 .cse20 (* (- 1) main_~Y~0)))) (let ((.cse7 (* main_~Y~0 main_~x~0)) (.cse24 (= main_~Y~0 0)) (.cse14 (div .cse13 main_~Y~0)) (.cse28 (div main_~xy~0 main_~y~0)) (.cse15 (+ main_~X~0 1))) (let ((.cse3 (* main_~Y~0 4)) (.cse19 (= (mod main_~xy~0 main_~y~0) 0)) (.cse21 (<= .cse28 .cse15)) (.cse22 (< main_~X~0 .cse28)) (.cse12 (= (* main_~y~0 .cse14) main_~xy~0)) (.cse17 (not .cse24)) (.cse18 (= main_~yx~0 (* main_~Y~0 .cse14))) (.cse2 (* 2 .cse7)) (.cse0 (* .cse5 2)) (.cse10 (<= 0 main_~Y~0)) (.cse25 (<= 0 main_~X~0)) (.cse4 (<= main_~X~0 5)) (.cse26 (not (<= main_~x~0 main_~X~0))) (.cse27 (<= main_~x~0 .cse15)) (.cse11 (<= main_~Y~0 5)) (.cse9 (= main_~xy~0 0)) (.cse1 (* main_~Y~0 2)) (.cse6 (= main_~y~0 0)) (.cse23 (= main_~yx~0 0))) (or (and (= (+ .cse0 .cse1) .cse2) (< .cse3 main_~X~0) (<= 2 main_~x~0) .cse4 (= .cse5 main_~xy~0) .cse6 (= main_~yx~0 .cse7) (= .cse8 (* main_~Y~0 6))) (and .cse9 (= main_~x~0 1) .cse10 (= .cse8 .cse3) (= main_~Y~0 main_~yx~0) .cse6 .cse11) (and (let ((.cse16 (= (mod (+ (* main_~X~0 main_~y~0 2) main_~X~0 main_~v~0) 2) 0))) (or (and .cse12 (= (mod .cse13 main_~Y~0) 0) (<= .cse14 .cse15) .cse16 (not (<= .cse14 main_~X~0)) .cse17 .cse18) (and .cse19 (not .cse6) .cse16 (= (+ .cse5 .cse20) main_~Y~0) .cse21 .cse22 .cse23 .cse24))) .cse10 .cse25 (<= .cse1 (+ main_~v~0 (* main_~X~0 2))) .cse4 .cse26 .cse27 .cse11) (and (= main_~y~0 2) (or (and .cse19 .cse21 .cse22 .cse23 .cse24) (and .cse12 .cse17 .cse18)) (= (+ .cse1 .cse2) (+ .cse0 main_~X~0 main_~v~0)) .cse10 .cse25 .cse4 .cse26 .cse27 .cse11) (and (= main_~x~0 0) .cse9 (= .cse8 .cse1) .cse6 .cse23))))))) [2022-03-19 09:31:08,694 INFO L885 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: true [2022-03-19 09:31:08,694 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 21 53) the Hoare annotation is: true [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 45) the Hoare annotation is: (let ((.cse6 (* main_~Y~0 main_~x~0)) (.cse7 (* main_~X~0 main_~y~0))) (let ((.cse2 (* .cse7 2)) (.cse0 (* main_~Y~0 2)) (.cse1 (* 2 .cse6)) (.cse3 (<= main_~X~0 5)) (.cse4 (= .cse7 main_~xy~0)) (.cse5 (= main_~yx~0 .cse6))) (or (and (<= main_~x~0 main_~X~0) (<= 0 main_~x~0) (= (+ .cse0 .cse1) (+ .cse2 main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= .cse0 (+ main_~v~0 (* main_~X~0 2))) .cse3 .cse4 .cse5 (<= main_~Y~0 5)) (and (= (+ .cse2 .cse0) .cse1) (< (* main_~Y~0 4) main_~X~0) (<= 2 main_~x~0) .cse3 .cse4 (= main_~y~0 0) .cse5 (= (+ main_~X~0 main_~v~0) (* main_~Y~0 6)))))) [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L40-2(lines 40 45) the Hoare annotation is: (let ((.cse6 (* main_~Y~0 main_~x~0)) (.cse5 (* main_~X~0 main_~y~0))) (let ((.cse4 (* .cse5 2)) (.cse0 (* main_~Y~0 2)) (.cse3 (* 2 .cse6)) (.cse2 (* main_~Y~0 4)) (.cse1 (<= main_~X~0 5))) (or (and (<= main_~x~0 main_~X~0) (<= 0 main_~x~0) (<= 0 main_~Y~0) (<= .cse0 (+ main_~v~0 (* main_~X~0 2))) .cse1 (= (+ .cse2 .cse3) (+ .cse4 main_~X~0 main_~v~0)) (<= main_~Y~0 5)) (and (= (+ .cse4 .cse0) .cse3) (< .cse2 main_~X~0) (<= 2 main_~x~0) .cse1 (= .cse5 main_~xy~0) (= main_~y~0 0) (= main_~yx~0 .cse6) (= (+ main_~X~0 main_~v~0) (* main_~Y~0 6)))))) [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse4 (* main_~X~0 main_~y~0)) (.cse5 (* main_~Y~0 main_~x~0))) (let ((.cse2 (* 2 .cse5)) (.cse0 (* .cse4 2)) (.cse1 (* main_~Y~0 2)) (.cse3 (<= main_~X~0 5))) (or (and (= (+ .cse0 .cse1) .cse2) (< (* main_~Y~0 4) main_~X~0) (<= 2 main_~x~0) .cse3 (= .cse4 main_~xy~0) (= main_~y~0 0) (= main_~yx~0 .cse5) (= (+ main_~X~0 main_~v~0) (* main_~Y~0 6))) (and (<= 0 main_~x~0) (= (+ .cse1 .cse2) (+ .cse0 main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= .cse1 (+ main_~v~0 (* main_~X~0 2))) .cse3 (<= main_~x~0 (+ main_~X~0 1)) (<= main_~Y~0 5))))) [2022-03-19 09:31:08,694 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L32-3(lines 32 47) the Hoare annotation is: (let ((.cse17 (* main_~X~0 main_~y~0)) (.cse16 (* main_~Y~0 main_~x~0))) (let ((.cse1 (* main_~Y~0 2)) (.cse2 (* 2 .cse16)) (.cse0 (* .cse17 2))) (let ((.cse3 (* main_~Y~0 4)) (.cse12 (= (+ .cse1 .cse2) (+ .cse0 main_~X~0 main_~v~0))) (.cse10 (<= 0 main_~Y~0)) (.cse13 (<= 0 main_~X~0)) (.cse4 (<= main_~X~0 5)) (.cse5 (= .cse17 main_~xy~0)) (.cse14 (not (<= main_~x~0 main_~X~0))) (.cse7 (= main_~yx~0 .cse16)) (.cse15 (<= main_~x~0 (+ main_~X~0 1))) (.cse11 (<= main_~Y~0 5)) (.cse9 (= main_~xy~0 0)) (.cse8 (+ main_~X~0 main_~v~0)) (.cse6 (= main_~y~0 0))) (or (and (= (+ .cse0 .cse1) .cse2) (< .cse3 main_~X~0) (<= 2 main_~x~0) .cse4 .cse5 .cse6 .cse7 (= .cse8 (* main_~Y~0 6))) (and .cse9 (= main_~x~0 1) .cse10 (= .cse8 .cse3) (= main_~Y~0 main_~yx~0) .cse6 .cse11) (and .cse12 .cse10 .cse13 (<= .cse1 (+ main_~v~0 (* main_~X~0 2))) .cse4 .cse5 .cse14 .cse7 .cse15 .cse11) (and (= main_~y~0 2) .cse12 .cse10 .cse13 .cse4 .cse5 .cse14 .cse7 .cse15 .cse11) (and (= main_~x~0 0) .cse9 (= .cse8 .cse1) .cse6 (= main_~yx~0 0)))))) [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse2 (* main_~Y~0 main_~x~0)) (.cse0 (* main_~X~0 main_~y~0))) (let ((.cse3 (<= main_~X~0 5)) (.cse1 (* main_~Y~0 2)) (.cse4 (= .cse0 main_~xy~0)) (.cse5 (= main_~yx~0 .cse2))) (or (and (= (+ (* .cse0 2) .cse1) (* 2 .cse2)) (< (* main_~Y~0 4) main_~X~0) (<= 2 main_~x~0) .cse3 .cse4 (= main_~y~0 0) .cse5 (= (+ main_~X~0 main_~v~0) (* main_~Y~0 6))) (and (<= 0 main_~x~0) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= .cse1 (+ main_~v~0 (* main_~X~0 2))) .cse3 (= (+ main_~X~0 main_~v~0 (* (* (div main_~xy~0 main_~X~0) main_~X~0) 2)) (+ (* (* (div main_~yx~0 main_~Y~0) main_~Y~0) 2) .cse1)) .cse4 .cse5 (<= main_~x~0 (+ main_~X~0 1)) (<= main_~Y~0 5))))) [2022-03-19 09:31:08,694 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 32 47) the Hoare annotation is: (let ((.cse7 (* main_~X~0 main_~y~0)) (.cse6 (* main_~Y~0 main_~x~0))) (let ((.cse2 (* 2 .cse6)) (.cse0 (* .cse7 2)) (.cse1 (* main_~Y~0 2)) (.cse3 (<= main_~X~0 5)) (.cse4 (= .cse7 main_~xy~0)) (.cse5 (= main_~yx~0 .cse6))) (or (and (= (+ .cse0 .cse1) .cse2) (< (* main_~Y~0 4) main_~X~0) (<= 2 main_~x~0) .cse3 .cse4 (= main_~y~0 0) .cse5 (= (+ main_~X~0 main_~v~0) (* main_~Y~0 6))) (and (<= 0 main_~x~0) (= (+ .cse1 .cse2) (+ .cse0 main_~X~0 main_~v~0)) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= .cse1 (+ main_~v~0 (* main_~X~0 2))) .cse3 .cse4 .cse5 (<= main_~x~0 (+ main_~X~0 1)) (<= main_~Y~0 5))))) [2022-03-19 09:31:08,694 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 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|)) [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 16) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:31:08,695 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-19 09:31:08,695 INFO L878 garLoopResultBuilder]: At program point L14(lines 14 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:31:08,695 INFO L878 garLoopResultBuilder]: At program point L14-2(lines 13 19) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:31:08,695 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 13 19) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:31:08,695 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:31:08,697 INFO L718 BasicCegarLoop]: Path program histogram: [30, 6, 6, 6, 4, 2, 2] [2022-03-19 09:31:08,698 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 09:31:08,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 09:31:08 BoogieIcfgContainer [2022-03-19 09:31:08,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 09:31:08,714 INFO L158 Benchmark]: Toolchain (without parser) took 802662.76ms. Allocated memory was 187.7MB in the beginning and 481.3MB in the end (delta: 293.6MB). Free memory was 140.2MB in the beginning and 439.1MB in the end (delta: -298.9MB). Peak memory consumption was 264.5MB. Max. memory is 8.0GB. [2022-03-19 09:31:08,714 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 09:31:08,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.16ms. Allocated memory is still 187.7MB. Free memory was 140.0MB in the beginning and 166.5MB in the end (delta: -26.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-19 09:31:08,716 INFO L158 Benchmark]: Boogie Preprocessor took 42.20ms. Allocated memory is still 187.7MB. Free memory was 166.5MB in the beginning and 165.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 09:31:08,716 INFO L158 Benchmark]: RCFGBuilder took 266.82ms. Allocated memory is still 187.7MB. Free memory was 165.1MB in the beginning and 154.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 09:31:08,716 INFO L158 Benchmark]: TraceAbstraction took 802165.33ms. Allocated memory was 187.7MB in the beginning and 481.3MB in the end (delta: 293.6MB). Free memory was 153.9MB in the beginning and 439.1MB in the end (delta: -285.2MB). Peak memory consumption was 278.4MB. Max. memory is 8.0GB. [2022-03-19 09:31:08,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 187.7MB. Free memory is still 156.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.16ms. Allocated memory is still 187.7MB. Free memory was 140.0MB in the beginning and 166.5MB in the end (delta: -26.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.20ms. Allocated memory is still 187.7MB. Free memory was 166.5MB in the beginning and 165.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 266.82ms. Allocated memory is still 187.7MB. Free memory was 165.1MB in the beginning and 154.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 802165.33ms. Allocated memory was 187.7MB in the beginning and 481.3MB in the end (delta: 293.6MB). Free memory was 153.9MB in the beginning and 439.1MB in the end (delta: -285.2MB). Peak memory consumption was 278.4MB. 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: 16]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 802.1s, OverallIterations: 28, TraceHistogramMax: 6, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 233.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 360.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 23 mSolverCounterUnknown, 563 SdHoareTripleChecker+Valid, 100.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 532 mSDsluCounter, 5367 SdHoareTripleChecker+Invalid, 99.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 177 IncrementalHoareTripleChecker+Unchecked, 4661 mSDsCounter, 294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7597 IncrementalHoareTripleChecker+Invalid, 8091 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 294 mSolverCounterUnsat, 706 mSDtfsCounter, 7597 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2807 GetRequests, 2149 SyntacticMatches, 56 SemanticMatches, 602 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 232.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=26, InterpolantAutomatonStates: 387, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 28 MinimizatonAttempts, 142 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 262 PreInvPairs, 465 NumberOfFragments, 1196 HoareAnnotationTreeSize, 262 FomulaSimplifications, 1552521 FormulaSimplificationTreeSizeReduction, 120.0s HoareSimplificationTime, 32 FomulaSimplificationsInter, 9874365 FormulaSimplificationTreeSizeReductionInter, 240.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (((((((X * y * 2 + Y * 2 == 2 * (Y * x) && Y * 4 < X) && 2 <= x) && X <= 5) && X * y == xy) && y == 0) && yx == Y * x) && X + v == Y * 6) || (((((((0 <= x && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && 0 <= Y) && 0 <= X) && Y * 2 <= v + X * 2) && X <= 5) && x <= X + 1) && Y <= 5) - ProcedureContractResult [Line: 10]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 13]: 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! [2022-03-19 09:31:08,941 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-19 09:31:09,001 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 137 Received shutdown request...