/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/cohendiv-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:07:35,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:07:35,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:07:35,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:07:35,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:07:35,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:07:35,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:07:35,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:07:35,739 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:07:35,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:07:35,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:07:35,740 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:07:35,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:07:35,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:07:35,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:07:35,742 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:07:35,743 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:07:35,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:07:35,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:07:35,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:07:35,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:07:35,950 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:07:35,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohendiv-ll.c [2022-04-06 15:07:35,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81eeef8e4/d87c990421564486a2b25d94481b9181/FLAG1bdf46e42 [2022-04-06 15:07:36,366 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:07:36,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohendiv-ll.c [2022-04-06 15:07:36,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81eeef8e4/d87c990421564486a2b25d94481b9181/FLAG1bdf46e42 [2022-04-06 15:07:36,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81eeef8e4/d87c990421564486a2b25d94481b9181 [2022-04-06 15:07:36,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:07:36,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:07:36,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:07:36,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:07:36,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:07:36,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:07:36" (1/1) ... [2022-04-06 15:07:36,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8198ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:36, skipping insertion in model container [2022-04-06 15:07:36,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:07:36" (1/1) ... [2022-04-06 15:07:36,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:07:36,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:07:36,952 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/cohendiv-ll.c[576,589] [2022-04-06 15:07:36,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:07:36,986 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:07:36,994 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/cohendiv-ll.c[576,589] [2022-04-06 15:07:37,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:07:37,013 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:07:37,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37 WrapperNode [2022-04-06 15:07:37,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:07:37,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:07:37,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:07:37,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:07:37,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:07:37,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:07:37,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:07:37,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:07:37,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (1/1) ... [2022-04-06 15:07:37,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:07:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:37,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 15:07:37,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 15:07:37,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:07:37,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:07:37,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:07:37,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:07:37,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:07:37,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:07:37,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:07:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:07:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:07:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:07:37,121 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:07:37,122 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:07:37,304 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:07:37,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:07:37,310 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:07:37,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:07:37 BoogieIcfgContainer [2022-04-06 15:07:37,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:07:37,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:07:37,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:07:37,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:07:37,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:07:36" (1/3) ... [2022-04-06 15:07:37,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d90c663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:07:37, skipping insertion in model container [2022-04-06 15:07:37,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:07:37" (2/3) ... [2022-04-06 15:07:37,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d90c663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:07:37, skipping insertion in model container [2022-04-06 15:07:37,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:07:37" (3/3) ... [2022-04-06 15:07:37,344 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll.c [2022-04-06 15:07:37,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:07:37,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:07:37,378 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:07:37,383 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 15:07:37,383 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:07:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 15:07:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 15:07:37,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:37,399 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:37,399 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1389800432, now seen corresponding path program 1 times [2022-04-06 15:07:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [523033245] [2022-04-06 15:07:37,417 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1389800432, now seen corresponding path program 2 times [2022-04-06 15:07:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129858296] [2022-04-06 15:07:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:07:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:07:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:37,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129858296] [2022-04-06 15:07:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129858296] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:37,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:37,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:07:37,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [523033245] [2022-04-06 15:07:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [523033245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:37,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:37,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:07:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120184710] [2022-04-06 15:07:37,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:37,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 15:07:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 15:07:37,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:07:37,620 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 15:07:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:37,701 INFO L93 Difference]: Finished difference Result 63 states and 95 transitions. [2022-04-06 15:07:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 15:07:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 15:07:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:37,714 INFO L225 Difference]: With dead ends: 63 [2022-04-06 15:07:37,714 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 15:07:37,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:07:37,719 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:37,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:07:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 15:07:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 15:07:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 15:07:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-04-06 15:07:37,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2022-04-06 15:07:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:37,763 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-04-06 15:07:37,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 15:07:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-04-06 15:07:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 15:07:37,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:37,764 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:37,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:07:37,765 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2071348352, now seen corresponding path program 1 times [2022-04-06 15:07:37,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725204932] [2022-04-06 15:07:37,770 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2071348352, now seen corresponding path program 2 times [2022-04-06 15:07:37,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223930116] [2022-04-06 15:07:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:37,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397991403] [2022-04-06 15:07:37,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:37,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:37,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 15:07:37,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:07:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:07:37,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:37,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:07:37,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:37,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223930116] [2022-04-06 15:07:37,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:37,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397991403] [2022-04-06 15:07:37,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397991403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:37,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:37,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:37,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725204932] [2022-04-06 15:07:37,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725204932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:37,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:37,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100097314] [2022-04-06 15:07:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:37,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:07:37,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:07:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:07:37,977 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 15:07:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:38,029 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-06 15:07:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:07:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 15:07:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:38,031 INFO L225 Difference]: With dead ends: 42 [2022-04-06 15:07:38,031 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 15:07:38,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:07:38,032 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:38,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:07:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 15:07:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-04-06 15:07:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 15:07:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-04-06 15:07:38,041 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2022-04-06 15:07:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:38,041 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-04-06 15:07:38,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 15:07:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-04-06 15:07:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 15:07:38,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:38,042 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:38,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:38,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:38,258 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash 933849696, now seen corresponding path program 1 times [2022-04-06 15:07:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:38,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110949057] [2022-04-06 15:07:38,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:38,260 INFO L85 PathProgramCache]: Analyzing trace with hash 933849696, now seen corresponding path program 2 times [2022-04-06 15:07:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:38,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936699335] [2022-04-06 15:07:38,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:38,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:38,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946333887] [2022-04-06 15:07:38,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:38,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:38,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:38,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 15:07:38,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:07:38,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:07:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:38,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:07:38,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936699335] [2022-04-06 15:07:38,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:38,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946333887] [2022-04-06 15:07:38,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946333887] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:38,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:38,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:38,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:38,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110949057] [2022-04-06 15:07:38,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110949057] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:38,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:38,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342889503] [2022-04-06 15:07:38,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:38,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:07:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:07:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:07:38,388 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:38,433 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-04-06 15:07:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:07:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 15:07:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:38,434 INFO L225 Difference]: With dead ends: 54 [2022-04-06 15:07:38,434 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 15:07:38,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:07:38,435 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:38,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 123 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:07:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 15:07:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 15:07:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 15:07:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-04-06 15:07:38,444 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 22 [2022-04-06 15:07:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:38,444 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-04-06 15:07:38,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 15:07:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-04-06 15:07:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 15:07:38,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:38,445 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:38,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 15:07:38,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 15:07:38,669 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 721086345, now seen corresponding path program 1 times [2022-04-06 15:07:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:38,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758520460] [2022-04-06 15:07:38,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 721086345, now seen corresponding path program 2 times [2022-04-06 15:07:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:38,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854146271] [2022-04-06 15:07:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:38,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:38,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619444876] [2022-04-06 15:07:38,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:38,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:38,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:38,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 15:07:38,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:07:38,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:07:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 15:07:38,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:07:38,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854146271] [2022-04-06 15:07:38,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:38,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619444876] [2022-04-06 15:07:38,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619444876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:38,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:38,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758520460] [2022-04-06 15:07:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758520460] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:38,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:07:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755458650] [2022-04-06 15:07:38,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:38,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:07:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:07:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:07:38,832 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:07:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:38,903 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2022-04-06 15:07:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:07:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-06 15:07:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:38,905 INFO L225 Difference]: With dead ends: 76 [2022-04-06 15:07:38,905 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 15:07:38,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:07:38,906 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:38,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 126 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:07:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 15:07:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2022-04-06 15:07:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 15:07:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2022-04-06 15:07:38,919 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 29 [2022-04-06 15:07:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:38,920 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2022-04-06 15:07:38,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:07:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2022-04-06 15:07:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:07:38,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:38,921 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:38,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:39,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:39,138 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -607067127, now seen corresponding path program 1 times [2022-04-06 15:07:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1563488778] [2022-04-06 15:07:39,139 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash -607067127, now seen corresponding path program 2 times [2022-04-06 15:07:39,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781664909] [2022-04-06 15:07:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:39,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:39,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:39,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475032524] [2022-04-06 15:07:39,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:39,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:39,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:39,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 15:07:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:07:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:07:39,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 15:07:39,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:07:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781664909] [2022-04-06 15:07:39,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475032524] [2022-04-06 15:07:39,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475032524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:39,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:39,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:07:39,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1563488778] [2022-04-06 15:07:39,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1563488778] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:39,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:39,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:07:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806491641] [2022-04-06 15:07:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:39,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:07:39,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:07:39,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:07:39,286 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 15:07:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:39,372 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2022-04-06 15:07:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:07:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-04-06 15:07:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:39,374 INFO L225 Difference]: With dead ends: 73 [2022-04-06 15:07:39,374 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 15:07:39,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:07:39,375 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:39,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:07:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 15:07:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 15:07:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 15:07:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2022-04-06 15:07:39,385 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 39 [2022-04-06 15:07:39,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:39,385 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2022-04-06 15:07:39,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 15:07:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2022-04-06 15:07:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 15:07:39,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:39,387 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:39,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 15:07:39,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:39,618 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:39,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1279335692, now seen corresponding path program 1 times [2022-04-06 15:07:39,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:39,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2080088328] [2022-04-06 15:07:39,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:07:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1279335692, now seen corresponding path program 2 times [2022-04-06 15:07:39,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:39,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400902112] [2022-04-06 15:07:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:39,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:39,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808815474] [2022-04-06 15:07:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:07:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:39,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:39,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 15:07:39,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:07:39,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:07:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:07:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 15:07:39,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 15:07:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400902112] [2022-04-06 15:07:39,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808815474] [2022-04-06 15:07:39,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808815474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:39,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:39,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 15:07:39,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2080088328] [2022-04-06 15:07:39,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2080088328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:39,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:39,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:07:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101722890] [2022-04-06 15:07:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:39,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:07:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:07:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:07:39,972 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 15:07:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:40,060 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2022-04-06 15:07:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:07:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-04-06 15:07:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:40,063 INFO L225 Difference]: With dead ends: 77 [2022-04-06 15:07:40,063 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 15:07:40,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:07:40,064 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:40,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:07:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 15:07:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-06 15:07:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 45 states have internal predecessors, (49), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 15:07:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2022-04-06 15:07:40,074 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2022-04-06 15:07:40,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:40,074 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2022-04-06 15:07:40,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 15:07:40,074 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2022-04-06 15:07:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 15:07:40,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:40,075 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:40,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:40,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:40,306 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1789016266, now seen corresponding path program 1 times [2022-04-06 15:07:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:40,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [205952514] [2022-04-06 15:07:40,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:40,674 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash -862809214, now seen corresponding path program 1 times [2022-04-06 15:07:40,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:40,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467777073] [2022-04-06 15:07:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:40,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:40,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:40,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944050912] [2022-04-06 15:07:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:40,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:40,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:40,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 15:07:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:40,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 15:07:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 15:07:41,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:07:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467777073] [2022-04-06 15:07:41,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944050912] [2022-04-06 15:07:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944050912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 15:07:41,472 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:07:41,793 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:07:46,112 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:07:46,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:07:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [205952514] [2022-04-06 15:07:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [205952514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:07:46,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:07:46,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 15:07:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387623064] [2022-04-06 15:07:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:07:46,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 15:07:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 15:07:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=801, Unknown=1, NotChecked=0, Total=930 [2022-04-06 15:07:46,515 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 15:07:49,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:07:51,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:07:53,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:07:56,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:07:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:07:56,344 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2022-04-06 15:07:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 15:07:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2022-04-06 15:07:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:07:56,345 INFO L225 Difference]: With dead ends: 98 [2022-04-06 15:07:56,345 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 15:07:56,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=238, Invalid=1483, Unknown=1, NotChecked=0, Total=1722 [2022-04-06 15:07:56,346 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 77 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 70 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:07:56,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 318 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 445 Invalid, 4 Unknown, 91 Unchecked, 8.7s Time] [2022-04-06 15:07:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 15:07:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2022-04-06 15:07:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 23 states have call successors, (23), 12 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 15:07:56,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-04-06 15:07:56,380 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 52 [2022-04-06 15:07:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:07:56,380 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-04-06 15:07:56,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 15:07:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-04-06 15:07:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 15:07:56,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:07:56,384 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:07:56,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 15:07:56,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:56,600 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:07:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:07:56,600 INFO L85 PathProgramCache]: Analyzing trace with hash 470692734, now seen corresponding path program 1 times [2022-04-06 15:07:56,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:07:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448554453] [2022-04-06 15:07:56,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {0={1=2}, 1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 15:07:56,783 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 15:07:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1530586122, now seen corresponding path program 1 times [2022-04-06 15:07:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:07:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406748402] [2022-04-06 15:07:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:56,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:07:56,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:07:56,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761736616] [2022-04-06 15:07:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:07:56,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:07:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:07:56,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:07:56,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 15:07:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:07:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:07:56,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:07:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:07:56,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:07:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 15:07:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:07:56,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406748402] [2022-04-06 15:07:56,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:07:56,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761736616] [2022-04-06 15:07:56,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761736616] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:07:56,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:07:56,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 15:07:57,014 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:07:57,190 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:08:05,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:08:07,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:08:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448554453] [2022-04-06 15:08:07,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448554453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:08:07,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:08:07,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 15:08:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120055978] [2022-04-06 15:08:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:08:07,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 15:08:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:08:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 15:08:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=483, Unknown=2, NotChecked=0, Total=600 [2022-04-06 15:08:07,593 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:08:09,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:11,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:13,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:15,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:17,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:19,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:21,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:23,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:25,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:26,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:28,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:30,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:32,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:34,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:36,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:38,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:40,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:42,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:45,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:46,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:48,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:50,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:52,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:54,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:56,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:08:58,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:09:00,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 15:09:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:09:00,534 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2022-04-06 15:09:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 15:09:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-04-06 15:09:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:09:00,535 INFO L225 Difference]: With dead ends: 98 [2022-04-06 15:09:00,535 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 15:09:00,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=186, Invalid=934, Unknown=2, NotChecked=0, Total=1122 [2022-04-06 15:09:00,536 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 82 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:09:00,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 286 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 578 Invalid, 23 Unknown, 0 Unchecked, 52.6s Time] [2022-04-06 15:09:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 15:09:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 15:09:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 15:09:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 15:09:00,537 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-04-06 15:09:00,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:09:00,537 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 15:09:00,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 16 states have internal predecessors, (35), 4 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:09:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 15:09:00,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 15:09:00,540 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 15:09:00,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 15:09:00,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:09:00,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 15:09:05,535 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 15:09:05,535 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 15:09:05,535 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 15:09:05,535 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 15:09:05,535 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 15:09:05,535 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 15:09:05,535 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 15:09:05,535 INFO L885 garLoopResultBuilder]: At program point L62(line 62) the Hoare annotation is: true [2022-04-06 15:09:05,536 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (<= 1 main_~y~0) [2022-04-06 15:09:05,536 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 64) the Hoare annotation is: true [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L48(lines 45 57) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,536 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 64) the Hoare annotation is: true [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L38(lines 36 60) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (<= 0 main_~r~0) (< main_~x~0 (* main_~y~0 2)) .cse0 .cse1 (not (<= main_~b~0 main_~r~0))) (and (= main_~x~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1))) [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L36-2(lines 36 60) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 0 (+ main_~b~0 main_~r~0)) .cse0 .cse1 (not (<= main_~b~0 main_~r~0))) (and (= main_~x~0 main_~r~0) (= main_~b~0 0) (= main_~q~0 0) .cse0 .cse1))) [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L36-3(lines 36 60) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (<= 0 main_~r~0) (< main_~x~0 (* main_~y~0 2)) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)) (not (<= main_~b~0 main_~r~0))) (and (= main_~x~0 main_~r~0) (= main_~q~0 0))) [2022-04-06 15:09:05,536 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 64) the Hoare annotation is: true [2022-04-06 15:09:05,536 INFO L878 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L53-1(line 53) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L45-2(lines 45 57) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L45-3(lines 45 57) the Hoare annotation is: (and (or (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~x~0 (* main_~y~0 2)))) (< main_~r~0 (* main_~b~0 2)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse2 (= main_~x~0 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and (<= 0 (+ main_~b~0 main_~r~0)) .cse0 .cse1 (not (<= main_~b~0 main_~r~0)) (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (< main_~q~0 2) (< main_~x~0 (* main_~y~0 2)) (<= main_~y~0 main_~x~0)) (and .cse2 .cse3))) (and .cse2 (= main_~b~0 0) .cse3 .cse0 .cse1))) [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L37-1(line 37) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (< 0 main_~q~0) (<= 0 main_~r~0) (< main_~x~0 (* main_~y~0 2)) .cse0 .cse1 (not (<= main_~b~0 main_~r~0))) (and (= main_~x~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1))) [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:09:05,537 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 15:09:05,538 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-04-06 15:09:05,538 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 15:09:05,538 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-04-06 15:09:05,538 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2022-04-06 15:09:05,538 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 15:09:05,540 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-04-06 15:09:05,541 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 15:09:05,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 03:09:05 BoogieIcfgContainer [2022-04-06 15:09:05,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 15:09:05,556 INFO L158 Benchmark]: Toolchain (without parser) took 88758.83ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 140.7MB in the beginning and 138.7MB in the end (delta: 2.0MB). Peak memory consumption was 105.1MB. Max. memory is 8.0GB. [2022-04-06 15:09:05,556 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 156.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 15:09:05,556 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.04ms. Allocated memory is still 194.0MB. Free memory was 171.6MB in the beginning and 168.9MB in the end (delta: 2.6MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-04-06 15:09:05,557 INFO L158 Benchmark]: Boogie Preprocessor took 21.00ms. Allocated memory is still 194.0MB. Free memory was 168.9MB in the beginning and 167.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 15:09:05,557 INFO L158 Benchmark]: RCFGBuilder took 287.28ms. Allocated memory is still 194.0MB. Free memory was 167.2MB in the beginning and 156.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 15:09:05,557 INFO L158 Benchmark]: TraceAbstraction took 88228.82ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 156.4MB in the beginning and 138.7MB in the end (delta: 17.6MB). Peak memory consumption was 120.6MB. Max. memory is 8.0GB. [2022-04-06 15:09:05,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 156.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.04ms. Allocated memory is still 194.0MB. Free memory was 171.6MB in the beginning and 168.9MB in the end (delta: 2.6MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.00ms. Allocated memory is still 194.0MB. Free memory was 168.9MB in the beginning and 167.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.28ms. Allocated memory is still 194.0MB. Free memory was 167.2MB in the beginning and 156.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 88228.82ms. Allocated memory was 194.0MB in the beginning and 232.8MB in the end (delta: 38.8MB). Free memory was 156.4MB in the beginning and 138.7MB in the end (delta: 17.6MB). Peak memory consumption was 120.6MB. 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: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 88.2s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 63.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 27 mSolverCounterUnknown, 233 SdHoareTripleChecker+Valid, 61.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 207 mSDsluCounter, 1260 SdHoareTripleChecker+Invalid, 61.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 91 IncrementalHoareTripleChecker+Unchecked, 985 mSDsCounter, 181 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1388 IncrementalHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 181 mSolverCounterUnsat, 275 mSDtfsCounter, 1388 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=7, InterpolantAutomatonStates: 82, 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, 8 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 240 PreInvPairs, 354 NumberOfFragments, 634 HoareAnnotationTreeSize, 240 FomulaSimplifications, 723 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 6159 FormulaSimplificationTreeSizeReductionInter, 4.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((x == r && q == 0) || ((q * y + r == x && 0 < q) && x < y * 2)) && 1 <= r) && 1 <= y) && b == a * y - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((q * y + r == x && 0 <= b + r) && 1 <= y) && b == a * y) && !(b <= r)) || ((((x == r && b == 0) && q == 0) && 1 <= y) && b == a * y) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || \old(cond) == cond RESULT: Ultimate proved your program to be correct! [2022-04-06 15:09:05,602 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...