/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:00:51,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:00:51,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:00:51,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:00:51,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:00:51,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:00:51,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:00:51,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:00:51,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:00:51,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:00:51,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:00:51,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:00:51,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:00:51,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:00:51,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:00:51,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:00:51,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:00:51,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:00:51,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:00:51,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:00:51,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:00:51,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:00:51,755 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:00:51,755 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:00:51,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:00:51,755 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:00:51,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:00:51,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:00:51,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:00:51,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:00:51,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:00:51,978 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:00:51,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2022-03-20 14:00:52,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6b867437/504acabfabaf430caa9d32dab4094e83/FLAG6c8c1e887 [2022-03-20 14:00:52,332 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:00:52,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2022-03-20 14:00:52,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6b867437/504acabfabaf430caa9d32dab4094e83/FLAG6c8c1e887 [2022-03-20 14:00:52,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6b867437/504acabfabaf430caa9d32dab4094e83 [2022-03-20 14:00:52,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:00:52,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:00:52,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:00:52,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:00:52,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:00:52,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3611c588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52, skipping insertion in model container [2022-03-20 14:00:52,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:00:52,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:00:52,920 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_valuebound2.c[597,610] [2022-03-20 14:00:52,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:00:52,937 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:00:52,954 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_valuebound2.c[597,610] [2022-03-20 14:00:52,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:00:52,967 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:00:52,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52 WrapperNode [2022-03-20 14:00:52,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:00:52,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:00:52,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:00:52,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:00:52,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:52,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:53,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:53,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:00:53,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:00:53,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:00:53,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:00:53,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (1/1) ... [2022-03-20 14:00:53,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:00:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:53,029 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) [2022-03-20 14:00:53,031 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 [2022-03-20 14:00:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:00:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:00:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:00:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:00:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:00:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:00:53,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:00:53,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:00:53,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:00:53,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:00:53,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:00:53,112 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:00:53,113 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:00:53,254 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:00:53,258 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:00:53,258 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:00:53,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:00:53 BoogieIcfgContainer [2022-03-20 14:00:53,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:00:53,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:00:53,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:00:53,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:00:53,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:00:52" (1/3) ... [2022-03-20 14:00:53,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587a73d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:00:53, skipping insertion in model container [2022-03-20 14:00:53,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:00:52" (2/3) ... [2022-03-20 14:00:53,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@587a73d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:00:53, skipping insertion in model container [2022-03-20 14:00:53,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:00:53" (3/3) ... [2022-03-20 14:00:53,279 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2022-03-20 14:00:53,282 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:00:53,282 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:00:53,325 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:00:53,336 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 [2022-03-20 14:00:53,336 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:00:53,349 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) [2022-03-20 14:00:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:00:53,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:53,360 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:00:53,360 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-03-20 14:00:53,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122658720] [2022-03-20 14:00:53,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 2 times [2022-03-20 14:00:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:53,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159070760] [2022-03-20 14:00:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:00:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:00:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:00:53,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:00:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:00:53,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 14:00:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:00:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:00:53,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159070760] [2022-03-20 14:00:53,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159070760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:53,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:53,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:00:53,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:53,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122658720] [2022-03-20 14:00:53,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122658720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:53,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:53,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:00:53,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512815934] [2022-03-20 14:00:53,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:53,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:00:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:00:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:00:53,640 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) [2022-03-20 14:00:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:53,705 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-03-20 14:00:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:00:53,708 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 [2022-03-20 14:00:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:53,713 INFO L225 Difference]: With dead ends: 57 [2022-03-20 14:00:53,713 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 14:00:53,715 INFO L912 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 [2022-03-20 14:00:53,719 INFO L913 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 [2022-03-20 14:00:53,720 INFO L914 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] [2022-03-20 14:00:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 14:00:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 14:00:53,759 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) [2022-03-20 14:00:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 14:00:53,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 14:00:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:53,761 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 14:00:53,762 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) [2022-03-20 14:00:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 14:00:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 14:00:53,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:53,764 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:00:53,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:00:53,765 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:53,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-03-20 14:00:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17376013] [2022-03-20 14:00:53,768 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 2 times [2022-03-20 14:00:53,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189456176] [2022-03-20 14:00:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:53,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:53,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:53,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836475303] [2022-03-20 14:00:53,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:53,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:53,824 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) [2022-03-20 14:00:53,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:00:53,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 14:00:53,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:00:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:00:54,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:00:54,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189456176] [2022-03-20 14:00:54,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836475303] [2022-03-20 14:00:54,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836475303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:54,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:54,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:00:54,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:54,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17376013] [2022-03-20 14:00:54,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17376013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:54,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:54,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:00:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234319507] [2022-03-20 14:00:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:54,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:00:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:00:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:00:54,107 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) [2022-03-20 14:00:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:54,189 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-03-20 14:00:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:00:54,189 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 [2022-03-20 14:00:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:54,191 INFO L225 Difference]: With dead ends: 39 [2022-03-20 14:00:54,191 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:00:54,192 INFO L912 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 [2022-03-20 14:00:54,193 INFO L913 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 [2022-03-20 14:00:54,196 INFO L914 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] [2022-03-20 14:00:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:00:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 14:00:54,205 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) [2022-03-20 14:00:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 14:00:54,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-20 14:00:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:54,208 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 14:00:54,208 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) [2022-03-20 14:00:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 14:00:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:00:54,209 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:54,209 INFO L499 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] [2022-03-20 14:00:54,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:00:54,423 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 [2022-03-20 14:00:54,424 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-03-20 14:00:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:54,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857693166] [2022-03-20 14:00:54,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 2 times [2022-03-20 14:00:54,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:54,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825749862] [2022-03-20 14:00:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:54,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:54,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635520821] [2022-03-20 14:00:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:54,437 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) [2022-03-20 14:00:54,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:00:54,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:00:54,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:54,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:00:54,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:00:54,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:00:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:54,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825749862] [2022-03-20 14:00:54,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:54,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635520821] [2022-03-20 14:00:54,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635520821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:00:54,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:00:54,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 14:00:54,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:54,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857693166] [2022-03-20 14:00:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857693166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:54,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:54,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 14:00:54,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340896812] [2022-03-20 14:00:54,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:54,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 14:00:54,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 14:00:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 14:00:54,982 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 14:00:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:55,094 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-20 14:00:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 14:00:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-20 14:00:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:55,095 INFO L225 Difference]: With dead ends: 61 [2022-03-20 14:00:55,095 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:00:55,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-20 14:00:55,096 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:00:55,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 141 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:00:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:00:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 14:00:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 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) [2022-03-20 14:00:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 14:00:55,102 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2022-03-20 14:00:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:55,102 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 14:00:55,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 14:00:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 14:00:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:00:55,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:55,103 INFO L499 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] [2022-03-20 14:00:55,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 14:00:55,319 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 [2022-03-20 14:00:55,320 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2022-03-20 14:00:55,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:55,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841172837] [2022-03-20 14:00:55,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 2 times [2022-03-20 14:00:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:55,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53377718] [2022-03-20 14:00:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:55,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:55,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860022816] [2022-03-20 14:00:55,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:55,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:55,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:55,347 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) [2022-03-20 14:00:55,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:00:55,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:00:55,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 14:00:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:00:55,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:00:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:00:55,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:55,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53377718] [2022-03-20 14:00:55,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:55,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860022816] [2022-03-20 14:00:55,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860022816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:00:55,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:00:55,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-20 14:00:55,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:55,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841172837] [2022-03-20 14:00:55,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841172837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:55,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:55,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 14:00:55,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567635179] [2022-03-20 14:00:55,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:55,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 14:00:55,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 14:00:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 14:00:55,649 INFO L87 Difference]: Start difference. First operand 35 states and 38 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) [2022-03-20 14:00:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:55,748 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-20 14:00:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 14:00:55,748 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 [2022-03-20 14:00:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:55,749 INFO L225 Difference]: With dead ends: 48 [2022-03-20 14:00:55,749 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 14:00:55,749 INFO L912 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 [2022-03-20 14:00:55,750 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:00:55,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:00:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 14:00:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-03-20 14:00:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 14:00:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-20 14:00:55,757 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2022-03-20 14:00:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:55,757 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-20 14:00:55,757 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) [2022-03-20 14:00:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-20 14:00:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 14:00:55,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:55,758 INFO L499 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] [2022-03-20 14:00:55,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 14:00:55,958 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 [2022-03-20 14:00:55,959 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-03-20 14:00:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198488064] [2022-03-20 14:00:55,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 2 times [2022-03-20 14:00:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191350802] [2022-03-20 14:00:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:55,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701360175] [2022-03-20 14:00:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:55,969 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) [2022-03-20 14:00:55,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:00:56,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:00:56,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 14:00:56,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:56,203 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:00:56,205 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:00:56,207 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:00:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 14:00:56,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:00:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 14:00:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191350802] [2022-03-20 14:00:56,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701360175] [2022-03-20 14:00:56,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701360175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:00:56,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:00:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 14:00:56,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198488064] [2022-03-20 14:00:56,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198488064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:56,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:56,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 14:00:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128045165] [2022-03-20 14:00:56,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:56,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 14:00:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 14:00:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-20 14:00:56,759 INFO L87 Difference]: Start difference. First operand 42 states and 45 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) [2022-03-20 14:00:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:57,846 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-20 14:00:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 14:00:57,847 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 [2022-03-20 14:00:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:57,847 INFO L225 Difference]: With dead ends: 53 [2022-03-20 14:00:57,847 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 14:00:57,848 INFO L912 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 [2022-03-20 14:00:57,848 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:00:57,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 231 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 14:00:57,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 14:00:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-03-20 14:00:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 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) [2022-03-20 14:00:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-20 14:00:57,854 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2022-03-20 14:00:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:57,854 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-20 14:00:57,854 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) [2022-03-20 14:00:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-20 14:00:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:00:57,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:57,855 INFO L499 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] [2022-03-20 14:00:57,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 14:00:58,067 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 [2022-03-20 14:00:58,067 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 1 times [2022-03-20 14:00:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:58,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752356816] [2022-03-20 14:00:58,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 2 times [2022-03-20 14:00:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:58,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652788340] [2022-03-20 14:00:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:58,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:58,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019515772] [2022-03-20 14:00:58,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:00:58,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:58,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:58,085 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) [2022-03-20 14:00:58,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:00:58,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:00:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 14:00:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:58,429 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:00:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 14:00:58,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:00:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:00:58,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:00:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652788340] [2022-03-20 14:00:58,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:00:58,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019515772] [2022-03-20 14:00:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019515772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:00:58,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:00:58,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-20 14:00:58,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:00:58,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752356816] [2022-03-20 14:00:58,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752356816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:00:58,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:00:58,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:00:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514143744] [2022-03-20 14:00:58,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:00:58,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:00:58,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:00:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:00:58,916 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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) [2022-03-20 14:00:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:00:59,210 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-03-20 14:00:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:00:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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 [2022-03-20 14:00:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:00:59,212 INFO L225 Difference]: With dead ends: 66 [2022-03-20 14:00:59,212 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 14:00:59,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-20 14:00:59,213 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:00:59,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 181 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:00:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 14:00:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 14:00:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:00:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 14:00:59,222 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 41 [2022-03-20 14:00:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:00:59,222 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 14:00:59,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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) [2022-03-20 14:00:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 14:00:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 14:00:59,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:00:59,223 INFO L499 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] [2022-03-20 14:00:59,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 14:00:59,439 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 [2022-03-20 14:00:59,439 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:00:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:00:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 3 times [2022-03-20 14:00:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:00:59,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1508131260] [2022-03-20 14:00:59,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:00:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 4 times [2022-03-20 14:00:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:00:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653637356] [2022-03-20 14:00:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:00:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:00:59,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:00:59,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731331814] [2022-03-20 14:00:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:00:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:00:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:00:59,459 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) [2022-03-20 14:00:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:00:59,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:00:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:00:59,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 14:00:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:00:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 14:00:59,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 14:01:00,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:00,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653637356] [2022-03-20 14:01:00,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:00,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731331814] [2022-03-20 14:01:00,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731331814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:00,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:00,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-20 14:01:00,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1508131260] [2022-03-20 14:01:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1508131260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:00,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:00,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 14:01:00,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273851976] [2022-03-20 14:01:00,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:00,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 14:01:00,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 14:01:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-20 14:01:00,206 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:01:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:00,437 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-20 14:01:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:01:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-20 14:01:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:00,438 INFO L225 Difference]: With dead ends: 77 [2022-03-20 14:01:00,438 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 14:01:00,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:01:00,439 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:00,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 158 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:01:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 14:01:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-03-20 14:01:00,447 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) [2022-03-20 14:01:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-03-20 14:01:00,447 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 41 [2022-03-20 14:01:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:00,447 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-03-20 14:01:00,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 14:01:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-03-20 14:01:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 14:01:00,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:00,448 INFO L499 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] [2022-03-20 14:01:00,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:01:00,664 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 [2022-03-20 14:01:00,665 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 3 times [2022-03-20 14:01:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:00,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501885543] [2022-03-20 14:01:00,666 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:01:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 4 times [2022-03-20 14:01:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:00,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334307855] [2022-03-20 14:01:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:00,672 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:00,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960847582] [2022-03-20 14:01:00,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:01:00,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:00,696 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) [2022-03-20 14:01:00,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:01:00,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:01:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 14:01:00,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 14:01:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 14:01:01,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334307855] [2022-03-20 14:01:01,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960847582] [2022-03-20 14:01:01,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960847582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:01,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:01,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 26 [2022-03-20 14:01:01,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501885543] [2022-03-20 14:01:01,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501885543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:01,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:01,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 14:01:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991629586] [2022-03-20 14:01:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:01,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 14:01:01,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 14:01:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:01:01,822 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:01:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:02,109 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-20 14:01:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 14:01:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-03-20 14:01:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:02,110 INFO L225 Difference]: With dead ends: 70 [2022-03-20 14:01:02,110 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 14:01:02,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-20 14:01:02,111 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:02,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 221 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:01:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 14:01:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-03-20 14:01:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:01:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-03-20 14:01:02,120 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 48 [2022-03-20 14:01:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:02,120 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-03-20 14:01:02,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:01:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-03-20 14:01:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:01:02,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:02,121 INFO L499 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] [2022-03-20 14:01:02,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:01:02,337 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 [2022-03-20 14:01:02,337 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:02,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 3 times [2022-03-20 14:01:02,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:02,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23761346] [2022-03-20 14:01:02,339 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:01:02,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 4 times [2022-03-20 14:01:02,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:02,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106929193] [2022-03-20 14:01:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:02,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298513512] [2022-03-20 14:01:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 14:01:02,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:02,347 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) [2022-03-20 14:01:02,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:01:02,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 14:01:02,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 14:01:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:02,785 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 14:01:02,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106929193] [2022-03-20 14:01:03,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298513512] [2022-03-20 14:01:03,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298513512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 14:01:03,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 14:01:03,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 14:01:03,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23761346] [2022-03-20 14:01:03,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23761346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:03,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:03,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:01:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521359856] [2022-03-20 14:01:03,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:03,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:01:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:01:03,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:01:03,395 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 14:01:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:03,632 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-03-20 14:01:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 14:01:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 14:01:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:03,634 INFO L225 Difference]: With dead ends: 81 [2022-03-20 14:01:03,634 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 14:01:03,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-20 14:01:03,634 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:03,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 251 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:01:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 14:01:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-20 14:01:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 14:01:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-03-20 14:01:03,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 50 [2022-03-20 14:01:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:03,645 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-03-20 14:01:03,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 14:01:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-03-20 14:01:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 14:01:03,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:03,645 INFO L499 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] [2022-03-20 14:01:03,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 14:01:03,851 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 [2022-03-20 14:01:03,852 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 5 times [2022-03-20 14:01:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:03,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605688168] [2022-03-20 14:01:03,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:01:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 6 times [2022-03-20 14:01:03,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885119383] [2022-03-20 14:01:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:03,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975482722] [2022-03-20 14:01:03,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:01:03,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:03,861 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) [2022-03-20 14:01:03,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 14:01:03,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 14:01:03,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 14:01:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:04,342 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:04,353 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:05,328 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 14:01:05,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-20 14:01:05,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885119383] [2022-03-20 14:01:05,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975482722] [2022-03-20 14:01:05,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975482722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:05,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:05,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 29 [2022-03-20 14:01:05,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605688168] [2022-03-20 14:01:05,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605688168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:05,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:05,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 14:01:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675706632] [2022-03-20 14:01:05,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:05,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 14:01:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 14:01:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-20 14:01:05,935 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 23 states, 20 states have (on average 1.5) 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), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 14:01:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:06,803 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-03-20 14:01:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 14:01:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.5) 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), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 14:01:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:06,804 INFO L225 Difference]: With dead ends: 84 [2022-03-20 14:01:06,804 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 14:01:06,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 14:01:06,805 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:06,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 271 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 393 Invalid, 0 Unknown, 83 Unchecked, 0.6s Time] [2022-03-20 14:01:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 14:01:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2022-03-20 14:01:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:01:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-20 14:01:06,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-03-20 14:01:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:06,820 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-20 14:01:06,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.5) 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), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 14:01:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-20 14:01:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 14:01:06,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:06,821 INFO L499 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] [2022-03-20 14:01:06,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 14:01:07,021 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 [2022-03-20 14:01:07,023 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 1 times [2022-03-20 14:01:07,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:07,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716067586] [2022-03-20 14:01:07,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:01:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 2 times [2022-03-20 14:01:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437297268] [2022-03-20 14:01:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:07,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:07,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092447274] [2022-03-20 14:01:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:01:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:07,039 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) [2022-03-20 14:01:07,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 14:01:07,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:01:07,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:07,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 14:01:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:01:07,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 14:01:08,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437297268] [2022-03-20 14:01:08,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092447274] [2022-03-20 14:01:08,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092447274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:08,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:08,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-03-20 14:01:08,273 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:08,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716067586] [2022-03-20 14:01:08,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716067586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:08,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:08,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 14:01:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206064948] [2022-03-20 14:01:08,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:08,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 14:01:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:08,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 14:01:08,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:01:08,274 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-03-20 14:01:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:08,450 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-03-20 14:01:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 14:01:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 [2022-03-20 14:01:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:08,452 INFO L225 Difference]: With dead ends: 69 [2022-03-20 14:01:08,452 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:01:08,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-03-20 14:01:08,454 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:08,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 265 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:01:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:01:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 14:01:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.0) internal successors, (38), 38 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 14:01:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-20 14:01:08,471 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 57 [2022-03-20 14:01:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:08,472 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-20 14:01:08,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) [2022-03-20 14:01:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-20 14:01:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 14:01:08,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:01:08,476 INFO L499 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] [2022-03-20 14:01:08,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 14:01:08,695 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 [2022-03-20 14:01:08,695 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:01:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:01:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 5 times [2022-03-20 14:01:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [594159939] [2022-03-20 14:01:08,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:01:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 6 times [2022-03-20 14:01:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:01:08,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661275881] [2022-03-20 14:01:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:01:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:01:08,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:01:08,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073792548] [2022-03-20 14:01:08,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 14:01:08,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:01:08,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:01:08,713 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) [2022-03-20 14:01:08,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 14:01:08,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 14:01:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:01:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 14:01:08,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:01:09,363 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:09,366 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:09,367 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 14:01:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-20 14:01:19,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:01:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 14:01:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:01:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661275881] [2022-03-20 14:01:20,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:01:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073792548] [2022-03-20 14:01:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073792548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:01:20,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:01:20,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-03-20 14:01:20,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:01:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [594159939] [2022-03-20 14:01:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [594159939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:01:20,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:01:20,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 14:01:20,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293798619] [2022-03-20 14:01:20,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:01:20,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 14:01:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:01:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 14:01:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-20 14:01:20,380 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:01:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:01:21,301 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 14:01:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 14:01:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-03-20 14:01:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:01:21,302 INFO L225 Difference]: With dead ends: 54 [2022-03-20 14:01:21,302 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 14:01:21,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 14:01:21,303 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 14:01:21,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 108 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 14:01:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 14:01:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 14:01:21,304 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) [2022-03-20 14:01:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 14:01:21,304 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-03-20 14:01:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:01:21,304 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 14:01:21,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 14:01:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 14:01:21,305 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 14:01:21,306 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 14:01:21,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 14:01:21,519 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 [2022-03-20 14:01:21,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 14:01:30,944 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2022-03-20 14:01:30,944 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2022-03-20 14:01:30,944 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2022-03-20 14:01:30,944 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2022-03-20 14:01:30,944 INFO L878 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 14:01:30,944 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|)) [2022-03-20 14:01:30,944 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|)) [2022-03-20 14:01:30,944 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~X~0 2) (<= 0 main_~X~0)) [2022-03-20 14:01:30,944 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~X~0 2) (<= 0 main_~Y~0) (<= 0 main_~X~0) (<= main_~Y~0 2)) [2022-03-20 14:01:30,944 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 14:01:30,945 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 21 53) the Hoare annotation is: true [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (and (<= main_~X~0 2) (<= 0 main_~X~0)) [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= main_~X~0 2)) (.cse3 (<= 0 main_~Y~0)) (.cse1 (= main_~xy~0 0)) (.cse4 (+ main_~X~0 main_~v~0)) (.cse2 (* main_~Y~0 2)) (.cse5 (= main_~y~0 0)) (.cse6 (= main_~yx~0 0))) (or (and .cse0 .cse1 (< main_~v~0 .cse2) .cse3 (= .cse4 (* main_~Y~0 4)) .cse5 .cse6) (let ((.cse9 (+ main_~X~0 1))) (and .cse0 .cse3 (let ((.cse10 (= (mod (+ (* main_~X~0 main_~y~0 2) main_~X~0 main_~v~0) 2) 0)) (.cse12 (* main_~X~0 main_~y~0)) (.cse13 (div .cse4 2)) (.cse11 (= main_~Y~0 0))) (or (let ((.cse8 (+ .cse12 .cse13 (* (- 1) main_~Y~0)))) (let ((.cse7 (div .cse8 main_~Y~0))) (and (= (* main_~y~0 .cse7) main_~xy~0) (= (mod .cse8 main_~Y~0) 0) (<= .cse7 .cse9) .cse10 (not (<= .cse7 main_~X~0)) (not .cse11) (= main_~yx~0 (* main_~Y~0 .cse7))))) (and (or (let ((.cse14 (div main_~xy~0 main_~y~0))) (and (= (mod main_~xy~0 main_~y~0) 0) (not .cse5) (<= .cse14 .cse9) (< main_~X~0 .cse14))) (and .cse1 .cse5)) .cse10 (= (+ .cse12 .cse13) main_~Y~0) .cse6 .cse11))) (<= 0 main_~X~0) (not (<= main_~x~0 main_~X~0)) (<= main_~x~0 .cse9) (<= main_~Y~0 2))) (and (= main_~x~0 0) .cse1 (= .cse4 .cse2) .cse5 .cse6))) [2022-03-20 14:01:30,945 INFO L885 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: true [2022-03-20 14:01:30,945 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 21 53) the Hoare annotation is: true [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 45) the Hoare annotation is: (let ((.cse20 (* main_~X~0 main_~y~0)) (.cse19 (* main_~Y~0 main_~x~0)) (.cse1 (* main_~Y~0 2))) (let ((.cse4 (* main_~Y~0 4)) (.cse3 (+ main_~X~0 main_~v~0)) (.cse5 (= main_~y~0 0)) (.cse0 (<= main_~X~0 2)) (.cse6 (<= main_~x~0 main_~X~0)) (.cse14 (<= main_~X~0 .cse1)) (.cse12 (* 2 .cse19)) (.cse13 (* .cse20 2)) (.cse2 (<= 0 main_~Y~0)) (.cse15 (<= 0 main_~X~0)) (.cse17 (= .cse20 main_~xy~0)) (.cse18 (= main_~yx~0 .cse19)) (.cse16 (<= main_~Y~0 2))) (or (and .cse0 (= main_~xy~0 0) (< main_~v~0 .cse1) .cse2 (= .cse3 .cse4) .cse5 (= main_~yx~0 0)) (and .cse6 (let ((.cse9 (* main_~X~0 3)) (.cse11 (* main_~Y~0 6)) (.cse7 (* main_~X~0 2)) (.cse8 (= .cse1 main_~yx~0)) (.cse10 (= main_~x~0 2))) (or (and (= main_~y~0 2) (= main_~xy~0 .cse7) .cse8 (<= .cse9 .cse4) .cse10 (= (+ main_~v~0 (* 5 main_~X~0)) .cse11)) (and (< .cse4 .cse9) .cse0 (= (+ main_~v~0 .cse9) .cse11) (= (+ .cse7 .cse12) (+ .cse13 .cse4)) (= (* main_~X~0 (div main_~X~0 main_~X~0)) main_~xy~0) .cse8 .cse14 .cse2 .cse15 .cse10))) .cse16) (and .cse0 (= main_~x~0 0) .cse2 .cse15 (= .cse3 .cse1) .cse17 .cse5 .cse18 .cse16) (and .cse0 .cse6 (= main_~y~0 1) .cse14 (= (+ .cse1 .cse12) (+ .cse13 main_~X~0 main_~v~0)) (= main_~x~0 1) .cse2 .cse15 .cse17 .cse18 .cse16)))) [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L40-2(lines 40 45) the Hoare annotation is: (let ((.cse3 (* main_~Y~0 2)) (.cse19 (* main_~X~0 2)) (.cse10 (* main_~X~0 main_~y~0)) (.cse5 (* main_~Y~0 4)) (.cse4 (* main_~X~0 3))) (let ((.cse13 (< .cse5 .cse4)) (.cse6 (* 2 (* main_~Y~0 main_~x~0))) (.cse1 (* .cse10 2)) (.cse12 (<= 0 main_~Y~0)) (.cse14 (= main_~y~0 2)) (.cse0 (<= main_~x~0 main_~X~0)) (.cse17 (<= .cse3 (+ main_~v~0 .cse19))) (.cse16 (+ main_~v~0 (* 5 main_~X~0))) (.cse8 (* main_~Y~0 6)) (.cse18 (+ main_~v~0 .cse4)) (.cse11 (<= main_~X~0 2)) (.cse20 (<= main_~X~0 .cse3)) (.cse15 (<= 0 main_~X~0)) (.cse9 (<= main_~Y~0 2))) (or (let ((.cse7 (+ .cse1 main_~X~0 main_~v~0)) (.cse2 (* 2 (* (div (+ .cse10 (* main_~X~0 (- 3)) main_~Y~0) main_~Y~0) main_~Y~0)))) (and .cse0 (= main_~y~0 3) (<= .cse1 (+ .cse2 .cse3 .cse4)) (= (+ .cse5 .cse6) .cse7) (not (= main_~Y~0 0)) (= .cse7 (+ .cse2 .cse8)) .cse9)) (and .cse11 (< main_~v~0 .cse3) .cse12 (= (+ main_~X~0 main_~v~0) .cse5) (= main_~y~0 0)) (and .cse13 .cse11 .cse14 .cse0 .cse12 (<= 2 main_~x~0) .cse15 (<= .cse16 (* main_~Y~0 8)) .cse17) (and (let ((.cse21 (= main_~x~0 1))) (or (and .cse13 .cse11 (= .cse18 .cse8) (= (+ .cse19 .cse6) (+ .cse1 .cse3)) .cse20 .cse21 .cse12 .cse15) (and .cse14 .cse0 .cse21 .cse17 (= .cse16 .cse8)))) .cse9) (and (= .cse18 .cse5) .cse11 (= main_~x~0 0) (= main_~y~0 1) .cse20 .cse15 .cse9)))) [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 47) the Hoare annotation is: (let ((.cse18 (* main_~X~0 main_~y~0))) (let ((.cse13 (* .cse18 2))) (let ((.cse9 (* main_~Y~0 4)) (.cse15 (* main_~X~0 3)) (.cse21 (* main_~X~0 2)) (.cse6 (* main_~Y~0 2)) (.cse22 (* 2 (* main_~Y~0 main_~x~0))) (.cse16 (+ .cse13 main_~X~0 main_~v~0))) (let ((.cse7 (<= 0 main_~Y~0)) (.cse8 (+ main_~X~0 main_~v~0)) (.cse10 (= main_~y~0 0)) (.cse12 (= (+ .cse6 .cse22) .cse16)) (.cse5 (<= main_~x~0 (+ main_~X~0 1))) (.cse2 (= main_~y~0 2)) (.cse4 (<= .cse6 (+ main_~v~0 .cse21))) (.cse3 (+ main_~v~0 (* 5 main_~X~0))) (.cse0 (< .cse9 .cse15)) (.cse1 (<= main_~X~0 2)) (.cse17 (* main_~Y~0 6)) (.cse19 (<= main_~X~0 .cse6)) (.cse11 (<= main_~Y~0 2))) (or (and .cse0 .cse1 .cse2 (<= .cse3 (* main_~Y~0 8)) .cse4 (<= 3 main_~x~0) .cse5) (and .cse1 (< main_~v~0 .cse6) .cse7 (= .cse8 .cse9) .cse10) (and .cse1 (= main_~x~0 0) .cse7 (<= 0 main_~X~0) (= .cse8 .cse6) .cse10 .cse11) (let ((.cse14 (* 2 (* (div (+ .cse18 (* main_~X~0 (- 3)) main_~Y~0) main_~Y~0) main_~Y~0)))) (and .cse12 (= main_~y~0 3) (<= .cse13 (+ .cse14 .cse6 .cse15)) .cse5 (not (= main_~Y~0 0)) (= .cse16 (+ .cse14 .cse17)) .cse11)) (and .cse1 (= main_~y~0 1) .cse19 .cse12 (= main_~x~0 1) .cse5 .cse11) (and (let ((.cse20 (= main_~x~0 2))) (or (and .cse2 .cse4 .cse20 (<= 1 main_~X~0) (= .cse3 .cse17)) (and .cse0 .cse1 (= (+ main_~v~0 .cse15) .cse17) (= (+ .cse21 .cse22) (+ .cse13 .cse9)) .cse19 .cse20))) .cse11)))))) [2022-03-20 14:01:30,945 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2022-03-20 14:01:30,945 INFO L878 garLoopResultBuilder]: At program point L32-3(lines 32 47) the Hoare annotation is: (let ((.cse0 (<= main_~X~0 2)) (.cse3 (<= 0 main_~Y~0)) (.cse5 (* main_~Y~0 4)) (.cse10 (not (<= main_~x~0 main_~X~0))) (.cse1 (= main_~xy~0 0)) (.cse4 (+ main_~X~0 main_~v~0)) (.cse2 (* main_~Y~0 2)) (.cse6 (= main_~y~0 0)) (.cse7 (= main_~yx~0 0))) (or (and .cse0 .cse1 (< main_~v~0 .cse2) .cse3 (= .cse4 .cse5) .cse6 .cse7) (let ((.cse9 (* main_~X~0 main_~y~0)) (.cse8 (* main_~Y~0 main_~x~0))) (and .cse0 (= (+ .cse2 (* 2 .cse8)) (+ (* .cse9 2) main_~X~0 main_~v~0)) .cse3 (<= 0 main_~X~0) (= .cse9 main_~xy~0) .cse10 (= main_~yx~0 .cse8) (<= main_~x~0 (+ main_~X~0 1)) (<= main_~Y~0 2))) (and (< .cse5 (* main_~X~0 3)) (= main_~y~0 2) (= main_~x~0 3) (<= (+ main_~v~0 (* 5 main_~X~0)) (* main_~Y~0 8)) (<= .cse2 (+ main_~v~0 (* main_~X~0 2))) .cse10) (and (= main_~x~0 0) .cse1 (= .cse4 .cse2) .cse6 .cse7))) [2022-03-20 14:01:30,946 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse24 (* main_~X~0 main_~y~0))) (let ((.cse6 (* .cse24 2)) (.cse27 (* main_~Y~0 main_~x~0))) (let ((.cse26 (+ main_~X~0 1)) (.cse4 (* main_~X~0 2)) (.cse7 (* main_~Y~0 4)) (.cse2 (* main_~X~0 3)) (.cse5 (* 2 .cse27)) (.cse23 (+ .cse6 main_~X~0 main_~v~0)) (.cse8 (* main_~Y~0 2))) (let ((.cse3 (* main_~Y~0 6)) (.cse17 (<= 0 main_~Y~0)) (.cse18 (+ main_~X~0 main_~v~0)) (.cse19 (= main_~y~0 0)) (.cse9 (<= main_~X~0 .cse8)) (.cse20 (= (+ .cse8 .cse5) .cse23)) (.cse13 (= .cse24 main_~xy~0)) (.cse14 (= main_~yx~0 .cse27)) (.cse16 (<= main_~Y~0 2)) (.cse0 (< .cse7 .cse2)) (.cse1 (<= main_~X~0 2)) (.cse11 (= main_~xy~0 .cse4)) (.cse15 (+ main_~v~0 (* 5 main_~X~0))) (.cse12 (<= .cse8 (+ main_~v~0 .cse4))) (.cse22 (<= main_~x~0 .cse26))) (or (and (let ((.cse10 (= main_~x~0 2))) (or (and .cse0 .cse1 (= (+ main_~v~0 .cse2) .cse3) (= (+ .cse4 .cse5) (+ .cse6 .cse7)) (= (* main_~X~0 (div main_~X~0 main_~X~0)) main_~xy~0) (= .cse8 main_~yx~0) .cse9 .cse10) (and .cse11 .cse12 .cse13 .cse14 .cse10 (<= 1 main_~X~0) (= .cse15 .cse3)))) .cse16) (and .cse1 (= main_~xy~0 0) (< main_~v~0 .cse8) .cse17 (= .cse18 .cse7) .cse19 (= main_~yx~0 0)) (let ((.cse21 (* 2 (* (div (+ .cse24 (* main_~X~0 (- 3)) main_~Y~0) main_~Y~0) main_~Y~0)))) (and .cse20 (= main_~y~0 3) (= (* (div (+ (div (+ (* main_~X~0 (- 7)) (* (- 1) main_~v~0)) (- 2)) (* (- 1) main_~Y~0)) main_~Y~0) main_~Y~0) main_~yx~0) (= main_~xy~0 .cse2) (<= .cse6 (+ .cse21 .cse8 .cse2)) .cse22 (not (= main_~Y~0 0)) (= .cse23 (+ .cse21 .cse3)) .cse16)) (and .cse1 (= main_~x~0 0) .cse17 (<= 0 main_~X~0) (= .cse18 .cse8) .cse13 .cse19 .cse14 .cse16) (and .cse1 (= main_~y~0 1) .cse9 .cse20 (= main_~x~0 1) .cse13 .cse14 .cse22 .cse16) (let ((.cse25 (div main_~yx~0 main_~Y~0))) (and .cse0 .cse1 (= main_~y~0 2) .cse11 (<= 3 .cse25) (<= .cse15 (* main_~Y~0 8)) .cse12 (<= 3 main_~x~0) .cse22 (<= .cse25 .cse26)))))))) [2022-03-20 14:01:30,946 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 32 47) the Hoare annotation is: (let ((.cse21 (* main_~X~0 main_~y~0))) (let ((.cse16 (* .cse21 2)) (.cse28 (* main_~Y~0 main_~x~0))) (let ((.cse23 (* 2 .cse28)) (.cse18 (+ .cse16 main_~X~0 main_~v~0)) (.cse1 (* main_~Y~0 2)) (.cse22 (* main_~X~0 2)) (.cse4 (* main_~Y~0 4)) (.cse15 (* main_~X~0 3)) (.cse13 (+ main_~X~0 1))) (let ((.cse12 (<= main_~x~0 .cse13)) (.cse6 (< .cse4 .cse15)) (.cse7 (= main_~xy~0 .cse22)) (.cse11 (<= .cse1 (+ main_~v~0 .cse22))) (.cse10 (+ main_~v~0 (* 5 main_~X~0))) (.cse19 (* main_~Y~0 6)) (.cse3 (+ main_~X~0 main_~v~0)) (.cse5 (= main_~y~0 0)) (.cse0 (<= main_~X~0 2)) (.cse24 (<= main_~X~0 .cse1)) (.cse14 (= (+ .cse1 .cse23) .cse18)) (.cse2 (<= 0 main_~Y~0)) (.cse9 (<= 0 main_~X~0)) (.cse26 (= .cse21 main_~xy~0)) (.cse27 (= main_~yx~0 .cse28)) (.cse20 (<= main_~Y~0 2))) (or (and .cse0 (= main_~xy~0 0) (< main_~v~0 .cse1) .cse2 (= .cse3 .cse4) .cse5 (= main_~yx~0 0)) (let ((.cse8 (div main_~yx~0 main_~Y~0))) (and .cse6 .cse0 (= main_~y~0 2) .cse7 (<= 3 .cse8) .cse2 .cse9 (<= .cse10 (* main_~Y~0 8)) .cse11 (<= 3 main_~x~0) .cse12 (<= .cse8 .cse13))) (let ((.cse17 (* 2 (* (div (+ .cse21 (* main_~X~0 (- 3)) main_~Y~0) main_~Y~0) main_~Y~0)))) (and .cse14 (= main_~y~0 3) (= (* (div (+ (div (+ (* main_~X~0 (- 7)) (* (- 1) main_~v~0)) (- 2)) (* (- 1) main_~Y~0)) main_~Y~0) main_~Y~0) main_~yx~0) (= main_~xy~0 .cse15) (<= .cse16 (+ .cse17 .cse1 .cse15)) .cse12 (not (= main_~Y~0 0)) (= .cse18 (+ .cse17 .cse19)) .cse20)) (and (let ((.cse25 (= main_~x~0 2))) (or (and .cse6 .cse0 (= (+ main_~v~0 .cse15) .cse19) (= (+ .cse22 .cse23) (+ .cse16 .cse4)) (= (* main_~X~0 (div main_~X~0 main_~X~0)) main_~xy~0) (= .cse1 main_~yx~0) .cse24 .cse2 .cse9 .cse25) (and .cse7 .cse11 .cse26 .cse27 .cse25 (<= 1 main_~X~0) (= .cse10 .cse19)))) .cse20) (and .cse0 (= main_~x~0 0) .cse2 .cse9 (= .cse3 .cse1) .cse26 .cse5 .cse27 .cse20) (and .cse0 (= main_~y~0 1) .cse24 .cse14 (= main_~x~0 1) .cse2 .cse9 .cse26 .cse27 .cse20)))))) [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 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|)) [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 14:01:30,946 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 16) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 14:01:30,946 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2022-03-20 14:01:30,946 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|))) [2022-03-20 14:01:30,946 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|))) [2022-03-20 14:01:30,946 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|))) [2022-03-20 14:01:30,946 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 14:01:30,948 INFO L719 BasicCegarLoop]: Path program histogram: [6, 6, 4, 2, 2, 2, 2] [2022-03-20 14:01:30,949 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 14:01:30,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 02:01:30 BoogieIcfgContainer [2022-03-20 14:01:30,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 14:01:30,974 INFO L158 Benchmark]: Toolchain (without parser) took 38204.54ms. Allocated memory was 178.3MB in the beginning and 339.7MB in the end (delta: 161.5MB). Free memory was 127.4MB in the beginning and 164.4MB in the end (delta: -37.0MB). Peak memory consumption was 175.4MB. Max. memory is 8.0GB. [2022-03-20 14:01:30,974 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory was 143.5MB in the beginning and 143.4MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 14:01:30,974 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.68ms. Allocated memory was 178.3MB in the beginning and 235.9MB in the end (delta: 57.7MB). Free memory was 127.2MB in the beginning and 213.1MB in the end (delta: -85.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. [2022-03-20 14:01:30,975 INFO L158 Benchmark]: Boogie Preprocessor took 36.17ms. Allocated memory is still 235.9MB. Free memory was 213.1MB in the beginning and 211.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 14:01:30,975 INFO L158 Benchmark]: RCFGBuilder took 252.83ms. Allocated memory is still 235.9MB. Free memory was 211.7MB in the beginning and 199.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 14:01:30,975 INFO L158 Benchmark]: TraceAbstraction took 37713.26ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 199.4MB in the beginning and 164.4MB in the end (delta: 35.0MB). Peak memory consumption was 190.3MB. Max. memory is 8.0GB. [2022-03-20 14:01:30,976 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory was 143.5MB in the beginning and 143.4MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 194.68ms. Allocated memory was 178.3MB in the beginning and 235.9MB in the end (delta: 57.7MB). Free memory was 127.2MB in the beginning and 213.1MB in the end (delta: -85.9MB). Peak memory consumption was 11.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.17ms. Allocated memory is still 235.9MB. Free memory was 213.1MB in the beginning and 211.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 252.83ms. Allocated memory is still 235.9MB. Free memory was 211.7MB in the beginning and 199.8MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 37713.26ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 199.4MB in the beginning and 164.4MB in the end (delta: 35.0MB). Peak memory consumption was 190.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 37.6s, OverallIterations: 12, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 266 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 2119 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 83 IncrementalHoareTripleChecker+Unchecked, 1846 mSDsCounter, 111 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2605 IncrementalHoareTripleChecker+Invalid, 2799 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 111 mSolverCounterUnsat, 273 mSDtfsCounter, 2605 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 909 GetRequests, 640 SyntacticMatches, 16 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=9, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 36 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 184 PreInvPairs, 300 NumberOfFragments, 2051 HoareAnnotationTreeSize, 184 FomulaSimplifications, 652 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 32 FomulaSimplificationsInter, 12974 FormulaSimplificationTreeSizeReductionInter, 9.1s 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: ((((((((((Y * 4 < X * 3 && X <= 2) && y == 2) && v + 5 * X <= Y * 8) && Y * 2 <= v + X * 2) && 3 <= x) && x <= X + 1) || ((((X <= 2 && v < Y * 2) && 0 <= Y) && X + v == Y * 4) && y == 0)) || ((((((X <= 2 && x == 0) && 0 <= Y) && 0 <= X) && X + v == Y * 2) && y == 0) && Y <= 2)) || ((((((Y * 2 + 2 * (Y * x) == X * y * 2 + X + v && y == 3) && X * y * 2 <= 2 * ((X * y + X * -3 + Y) / Y * Y) + Y * 2 + X * 3) && x <= X + 1) && !(Y == 0)) && X * y * 2 + X + v == 2 * ((X * y + X * -3 + Y) / Y * Y) + Y * 6) && Y <= 2)) || ((((((X <= 2 && y == 1) && X <= Y * 2) && Y * 2 + 2 * (Y * x) == X * y * 2 + X + v) && x == 1) && x <= X + 1) && Y <= 2)) || ((((((y == 2 && Y * 2 <= v + X * 2) && x == 2) && 1 <= X) && v + 5 * X == Y * 6) || (((((Y * 4 < X * 3 && X <= 2) && v + X * 3 == Y * 6) && X * 2 + 2 * (Y * x) == X * y * 2 + Y * 4) && X <= Y * 2) && x == 2)) && Y <= 2) - 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! [2022-03-20 14:01:31,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...