/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:43:12,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:43:12,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:43:13,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:43:13,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:43:13,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:43:13,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:43:13,059 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 15:43:13,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:43:13,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:43:13,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:43:13,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:43:13,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:43:13,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:43:13,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:43:13,068 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:43:13,068 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:43:13,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:43:13,068 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:43:13,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:43:13,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:43:13,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:43:13,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:43:13,240 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:43:13,241 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:43:13,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2022-04-06 15:43:13,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bf22b135/1c66728bcfd246bc949f1e6e12aa7162/FLAG9e91886df [2022-04-06 15:43:13,585 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:43:13,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2022-04-06 15:43:13,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bf22b135/1c66728bcfd246bc949f1e6e12aa7162/FLAG9e91886df [2022-04-06 15:43:13,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9bf22b135/1c66728bcfd246bc949f1e6e12aa7162 [2022-04-06 15:43:13,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:43:13,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:43:13,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:43:13,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:43:13,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:43:13,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b3ae9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13, skipping insertion in model container [2022-04-06 15:43:13,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:43:13,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:43:13,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2022-04-06 15:43:13,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:43:13,755 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:43:13,765 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2022-04-06 15:43:13,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:43:13,787 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:43:13,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13 WrapperNode [2022-04-06 15:43:13,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:43:13,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:43:13,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:43:13,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:43:13,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:43:13,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:43:13,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:43:13,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:43:13,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (1/1) ... [2022-04-06 15:43:13,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:43:13,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:13,824 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 15:43:13,839 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 15:43:13,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:43:13,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:43:13,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:43:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:43:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:43:13,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:43:13,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:43:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:43:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:43:13,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:43:13,891 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:43:13,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:43:13,971 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:43:13,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:43:13,975 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:43:13,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:43:13 BoogieIcfgContainer [2022-04-06 15:43:13,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:43:13,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:43:13,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:43:13,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:43:13,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:43:13" (1/3) ... [2022-04-06 15:43:13,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544bd55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:43:13, skipping insertion in model container [2022-04-06 15:43:13,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:43:13" (2/3) ... [2022-04-06 15:43:13,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544bd55c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:43:13, skipping insertion in model container [2022-04-06 15:43:13,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:43:13" (3/3) ... [2022-04-06 15:43:13,994 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.c [2022-04-06 15:43:13,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:43:13,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:43:14,042 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:43:14,048 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 15:43:14,048 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:43:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 15:43:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 15:43:14,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:14,064 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:14,065 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-04-06 15:43:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:14,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409682389] [2022-04-06 15:43:14,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:14,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-04-06 15:43:14,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:14,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831515471] [2022-04-06 15:43:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:14,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:43:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:14,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:43:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:14,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 15:43:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:43:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:43:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:43:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831515471] [2022-04-06 15:43:14,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831515471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:14,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:14,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:43:14,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409682389] [2022-04-06 15:43:14,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409682389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:14,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:14,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:43:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314712545] [2022-04-06 15:43:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:14,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 15:43:14,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 15:43:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:43:14,315 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:43:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:14,418 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-04-06 15:43:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 15:43:14,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 15:43:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:14,425 INFO L225 Difference]: With dead ends: 71 [2022-04-06 15:43:14,426 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 15:43:14,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:43:14,432 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:14,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 15:43:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 15:43:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 15:43:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 15:43:14,480 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-04-06 15:43:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:14,480 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 15:43:14,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 15:43:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 15:43:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 15:43:14,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:14,483 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:14,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:43:14,483 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:14,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-04-06 15:43:14,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:14,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60299952] [2022-04-06 15:43:14,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-04-06 15:43:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:14,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552373911] [2022-04-06 15:43:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:14,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:14,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99555811] [2022-04-06 15:43:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:14,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:14,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:14,514 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 15:43:14,515 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 15:43:14,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:43:14,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:43:14,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 15:43:14,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:14,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:14,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552373911] [2022-04-06 15:43:14,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:14,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99555811] [2022-04-06 15:43:14,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99555811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:14,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:14,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:14,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:14,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60299952] [2022-04-06 15:43:14,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60299952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:14,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:14,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:14,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206988242] [2022-04-06 15:43:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:14,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:43:14,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:43:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:43:14,709 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:43:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:14,790 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-04-06 15:43:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:43:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 15:43:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:14,792 INFO L225 Difference]: With dead ends: 45 [2022-04-06 15:43:14,792 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 15:43:14,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:43:14,793 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 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 15:43:14,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:43:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 15:43:14,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-04-06 15:43:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 15:43:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-06 15:43:14,812 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-04-06 15:43:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:14,812 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-06 15:43:14,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 15:43:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-06 15:43:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 15:43:14,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:14,813 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:14,832 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 15:43:15,014 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 15:43:15,014 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-04-06 15:43:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779784632] [2022-04-06 15:43:15,016 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-04-06 15:43:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856249090] [2022-04-06 15:43:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:15,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:15,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116751875] [2022-04-06 15:43:15,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:15,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:15,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:15,044 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 15:43:15,045 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 15:43:15,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 15:43:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 15:43:15,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856249090] [2022-04-06 15:43:15,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116751875] [2022-04-06 15:43:15,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116751875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:15,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:43:15,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779784632] [2022-04-06 15:43:15,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779784632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:15,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 15:43:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676544436] [2022-04-06 15:43:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:15,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 15:43:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 15:43:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:43:15,219 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 15:43:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:15,346 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-04-06 15:43:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:43:15,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-04-06 15:43:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:15,349 INFO L225 Difference]: With dead ends: 57 [2022-04-06 15:43:15,349 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 15:43:15,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:43:15,356 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:15,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 166 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:15,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 15:43:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 15:43:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-04-06 15:43:15,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-04-06 15:43:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:15,366 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-04-06 15:43:15,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 15:43:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-04-06 15:43:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 15:43:15,367 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:15,367 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:15,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:15,568 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 15:43:15,568 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-04-06 15:43:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:15,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745691200] [2022-04-06 15:43:15,569 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-04-06 15:43:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182122226] [2022-04-06 15:43:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:15,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:15,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687851489] [2022-04-06 15:43:15,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:15,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:15,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:15,581 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 15:43:15,582 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 15:43:15,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:15,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 15:43:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 15:43:15,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 15:43:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:15,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182122226] [2022-04-06 15:43:15,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:15,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687851489] [2022-04-06 15:43:15,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687851489] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:43:15,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:43:15,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 15:43:15,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:15,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745691200] [2022-04-06 15:43:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745691200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:15,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:15,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:43:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972546468] [2022-04-06 15:43:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:15,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:43:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:43:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:43:15,887 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:43:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:15,935 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-04-06 15:43:15,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:43:15,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-04-06 15:43:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:15,936 INFO L225 Difference]: With dead ends: 59 [2022-04-06 15:43:15,936 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 15:43:15,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-04-06 15:43:15,937 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:15,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 102 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:43:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 15:43:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 15:43:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-04-06 15:43:15,945 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 40 [2022-04-06 15:43:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:15,946 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-04-06 15:43:15,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-06 15:43:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-04-06 15:43:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 15:43:15,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:15,947 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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 15:43:15,964 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 15:43:16,162 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 15:43:16,163 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-04-06 15:43:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613683795] [2022-04-06 15:43:16,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-04-06 15:43:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309361640] [2022-04-06 15:43:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:16,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120158282] [2022-04-06 15:43:16,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:16,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:16,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:16,180 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 15:43:16,185 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 15:43:16,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:16,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:43:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 15:43:16,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:43:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309361640] [2022-04-06 15:43:16,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120158282] [2022-04-06 15:43:16,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120158282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:16,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:16,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:16,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613683795] [2022-04-06 15:43:16,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613683795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:16,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:16,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826474434] [2022-04-06 15:43:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:16,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:43:16,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:16,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:43:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:43:16,301 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:43:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:16,374 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-04-06 15:43:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:43:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-04-06 15:43:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:16,375 INFO L225 Difference]: With dead ends: 63 [2022-04-06 15:43:16,376 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 15:43:16,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 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 15:43:16,376 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:16,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 15:43:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 15:43:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-04-06 15:43:16,385 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 50 [2022-04-06 15:43:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:16,385 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-04-06 15:43:16,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 15:43:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-04-06 15:43:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 15:43:16,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:16,386 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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, 1, 1] [2022-04-06 15:43:16,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:16,599 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 15:43:16,599 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-04-06 15:43:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843596834] [2022-04-06 15:43:16,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-04-06 15:43:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772459851] [2022-04-06 15:43:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:16,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:16,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:16,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105480181] [2022-04-06 15:43:16,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:16,610 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 15:43:16,611 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 15:43:16,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:16,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:16,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:43:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 15:43:16,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 15:43:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772459851] [2022-04-06 15:43:16,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:16,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105480181] [2022-04-06 15:43:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105480181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:43:16,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:43:16,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-06 15:43:16,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843596834] [2022-04-06 15:43:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843596834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:16,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:16,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768370931] [2022-04-06 15:43:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:16,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:43:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:16,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:43:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:43:16,884 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:43:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:16,966 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-04-06 15:43:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:43:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-04-06 15:43:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:16,969 INFO L225 Difference]: With dead ends: 67 [2022-04-06 15:43:16,969 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 15:43:16,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:43:16,971 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:16,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 121 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:16,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 15:43:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 15:43:16,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:43:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-04-06 15:43:16,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 56 [2022-04-06 15:43:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:16,992 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-04-06 15:43:16,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 15:43:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-04-06 15:43:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 15:43:16,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:16,996 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:17,013 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 15:43:17,213 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 15:43:17,214 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:17,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-04-06 15:43:17,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:17,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968152387] [2022-04-06 15:43:17,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-04-06 15:43:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124461338] [2022-04-06 15:43:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:17,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:17,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:17,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171287170] [2022-04-06 15:43:17,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:17,224 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 15:43:17,261 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 15:43:17,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:17,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 15:43:17,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 15:43:17,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:17,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124461338] [2022-04-06 15:43:17,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:17,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171287170] [2022-04-06 15:43:17,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171287170] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:43:17,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:43:17,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 15:43:17,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:17,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968152387] [2022-04-06 15:43:17,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968152387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:17,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:17,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:43:17,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872440759] [2022-04-06 15:43:17,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:17,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:43:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:43:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:43:17,700 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 15:43:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:17,893 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2022-04-06 15:43:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:43:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2022-04-06 15:43:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:17,894 INFO L225 Difference]: With dead ends: 122 [2022-04-06 15:43:17,894 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 15:43:17,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:43:17,895 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:17,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 184 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:43:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 15:43:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-04-06 15:43:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 15:43:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2022-04-06 15:43:17,903 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 63 [2022-04-06 15:43:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:17,904 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2022-04-06 15:43:17,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 15:43:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2022-04-06 15:43:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 15:43:17,904 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:43:17,905 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:43:17,922 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 15:43:18,120 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 15:43:18,121 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:43:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:43:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-04-06 15:43:18,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074661870] [2022-04-06 15:43:18,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:43:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-04-06 15:43:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:43:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197843441] [2022-04-06 15:43:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:43:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:43:18,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:43:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787752313] [2022-04-06 15:43:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:43:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:43:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:43:18,138 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 15:43:18,139 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 15:43:18,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:43:18,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:43:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:43:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:43:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 15:43:18,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:43:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 15:43:18,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:43:18,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197843441] [2022-04-06 15:43:18,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:43:18,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787752313] [2022-04-06 15:43:18,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787752313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:43:18,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:43:18,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-04-06 15:43:18,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:43:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074661870] [2022-04-06 15:43:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074661870] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:43:18,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:43:18,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:43:18,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218630779] [2022-04-06 15:43:18,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:43:18,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:43:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:43:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:43:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:43:18,560 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 15:43:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:43:18,667 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-04-06 15:43:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:43:18,668 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-04-06 15:43:18,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:43:18,668 INFO L225 Difference]: With dead ends: 88 [2022-04-06 15:43:18,668 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 15:43:18,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-04-06 15:43:18,669 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:43:18,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 144 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:43:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 15:43:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 15:43:18,670 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 15:43:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 15:43:18,670 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-04-06 15:43:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:43:18,670 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 15:43:18,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 15:43:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 15:43:18,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 15:43:18,672 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 15:43:18,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 15:43:18,887 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 15:43:18,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 15:43:19,553 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 15:43:19,553 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 15:43:19,553 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 15:43:19,553 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 15:43:19,553 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 15:43:19,553 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 15:43:19,553 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 15:43:19,553 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-04-06 15:43:19,553 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1) (<= 1 main_~y~0) (<= main_~y~0 1)) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 0 main_~x~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2022-04-06 15:43:19,554 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2022-04-06 15:43:19,554 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~x~0 1)) (.cse2 (<= 1 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse6 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~x~0 1)) (.cse2 (<= 1 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse6 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~x~0 1)) (.cse2 (<= 1 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse6 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) [2022-04-06 15:43:19,554 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse1 (<= main_~y~0 1))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 (<= main_~y~0 main_~x~0) (< (* main_~r~0 2) main_~x~0)) (and (= main_~x~0 main_~r~0) (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) (<= 0 main_~x~0) (<= main_~x~0 1) (= main_~q~0 0) (<= 1 main_~y~0) .cse0 .cse1))) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse1 (<= main_~y~0 1))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 (<= main_~y~0 main_~x~0) (< (* main_~r~0 2) main_~x~0)) (and (= main_~x~0 main_~r~0) (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) (= main_~b~0 0) (<= main_~x~0 1) (= main_~q~0 0) (<= 1 main_~y~0) .cse0 .cse1))) [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) (= main_~b~0 (* main_~a~0 main_~y~0)) .cse0 (<= main_~y~0 main_~x~0) (< (* main_~r~0 2) main_~x~0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0) (<= 1 main_~y~0) .cse0))) [2022-04-06 15:43:19,554 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-04-06 15:43:19,554 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= main_~x~0 main_~r~0) (<= (* 2 .cse0) main_~r~0) (<= main_~x~0 1) (<= 1 main_~r~0) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= main_~x~0 main_~r~0) (<= (* 2 .cse0) main_~r~0) (<= main_~x~0 1) (<= 1 main_~r~0) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~b~0 .cse0) (<= main_~y~0 1))) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~x~0 1)) (.cse2 (<= 1 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse6 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (= main_~x~0 main_~r~0)) (.cse1 (<= main_~x~0 1)) (.cse2 (<= 1 main_~r~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse5 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse6 (<= main_~y~0 1))) (or (and .cse0 .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 .cse6) (and .cse0 (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (and (= main_~x~0 main_~r~0) (<= main_~x~0 1) (<= 1 main_~r~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)) (<= main_~y~0 1)) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse1 (<= main_~y~0 1))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 (<= main_~y~0 main_~x~0) (< (* main_~r~0 2) main_~x~0)) (and (= main_~x~0 main_~r~0) (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) (= main_~b~0 0) (<= main_~x~0 1) (= main_~q~0 0) (<= 1 main_~y~0) .cse0 .cse1))) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (* main_~a~0 main_~y~0))) (.cse1 (<= main_~y~0 1))) (or (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse0 .cse1 (<= main_~y~0 main_~x~0) (< (* main_~r~0 2) main_~x~0)) (and (= main_~x~0 main_~r~0) (<= (div (* (- 1) main_~b~0) (- 2)) (div main_~r~0 2)) (<= 0 main_~x~0) (<= main_~x~0 1) (= main_~q~0 0) (<= 1 main_~y~0) .cse0 .cse1))) [2022-04-06 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 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 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 15:43:19,555 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:43:19,556 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 15:43:19,556 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:43:19,556 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 15:43:19,556 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 15:43:19,558 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 15:43:19,559 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 15:43:19,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 03:43:19 BoogieIcfgContainer [2022-04-06 15:43:19,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 15:43:19,569 INFO L158 Benchmark]: Toolchain (without parser) took 5968.20ms. Allocated memory was 180.4MB in the beginning and 237.0MB in the end (delta: 56.6MB). Free memory was 132.5MB in the beginning and 130.5MB in the end (delta: 2.0MB). Peak memory consumption was 60.0MB. Max. memory is 8.0GB. [2022-04-06 15:43:19,569 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory was 148.6MB in the beginning and 148.5MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 15:43:19,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.30ms. Allocated memory is still 180.4MB. Free memory was 132.3MB in the beginning and 157.8MB in the end (delta: -25.5MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-04-06 15:43:19,570 INFO L158 Benchmark]: Boogie Preprocessor took 17.04ms. Allocated memory is still 180.4MB. Free memory was 157.8MB in the beginning and 156.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 15:43:19,570 INFO L158 Benchmark]: RCFGBuilder took 171.15ms. Allocated memory is still 180.4MB. Free memory was 156.4MB in the beginning and 146.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 15:43:19,570 INFO L158 Benchmark]: TraceAbstraction took 5591.04ms. Allocated memory was 180.4MB in the beginning and 237.0MB in the end (delta: 56.6MB). Free memory was 145.6MB in the beginning and 130.5MB in the end (delta: 15.2MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. [2022-04-06 15:43:19,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory was 148.6MB in the beginning and 148.5MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.30ms. Allocated memory is still 180.4MB. Free memory was 132.3MB in the beginning and 157.8MB in the end (delta: -25.5MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.04ms. Allocated memory is still 180.4MB. Free memory was 157.8MB in the beginning and 156.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 171.15ms. Allocated memory is still 180.4MB. Free memory was 156.4MB in the beginning and 146.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5591.04ms. Allocated memory was 180.4MB in the beginning and 237.0MB in the end (delta: 56.6MB). Free memory was 145.6MB in the beginning and 130.5MB in the end (delta: 15.2MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 206 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 162 mSDsluCounter, 1067 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 774 mSDsCounter, 101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 824 IncrementalHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 101 mSolverCounterUnsat, 293 mSDtfsCounter, 824 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 590 GetRequests, 512 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 57, 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, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 259 PreInvPairs, 341 NumberOfFragments, 780 HoareAnnotationTreeSize, 259 FomulaSimplifications, 56 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 39 FomulaSimplificationsInter, 564 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((x == r && x <= 1) && 1 <= r) && b == y) && q == 0) && 1 <= y) && b == a * y) && y <= 1) || (((((((x == r && -1 * b / -2 <= r / 2) && x <= 1) && 1 <= r) && q == 0) && 1 <= y) && b == a * y) && y <= 1) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((((x == y + r && q == 1) && b == a * y) && y <= 1) && y <= x) && r * 2 < x) || (((((((x == r && -1 * b / -2 <= r / 2) && b == 0) && x <= 1) && q == 0) && 1 <= y) && b == a * y) && y <= 1) - 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) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-06 15:43:19,597 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...