/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/prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:48:21,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:48:21,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:48:21,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:48:21,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:48:21,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:48:21,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:48:21,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:48:21,873 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:48:21,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:48:21,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:48:21,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:48:21,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:48:21,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:48:21,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:48:21,876 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:48:21,877 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:48:21,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:48:21,877 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:48:21,877 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:48:22,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:48:22,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:48:22,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:48:22,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:48:22,053 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:48:22,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-03-20 13:48:22,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e7df22f9/1d8e40bd880c4a60853b69a0a0ea763b/FLAGc797e405f [2022-03-20 13:48:22,456 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:48:22,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prod4br-ll.c [2022-03-20 13:48:22,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e7df22f9/1d8e40bd880c4a60853b69a0a0ea763b/FLAGc797e405f [2022-03-20 13:48:22,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e7df22f9/1d8e40bd880c4a60853b69a0a0ea763b [2022-03-20 13:48:22,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:48:22,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:48:22,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:48:22,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:48:22,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:48:22,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:48:22" (1/1) ... [2022-03-20 13:48:22,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2845ba2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:22, skipping insertion in model container [2022-03-20 13:48:22,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:48:22" (1/1) ... [2022-03-20 13:48:22,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:48:22,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:48:23,032 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/prod4br-ll.c[524,537] [2022-03-20 13:48:23,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:48:23,046 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:48:23,053 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/prod4br-ll.c[524,537] [2022-03-20 13:48:23,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:48:23,064 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:48:23,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23 WrapperNode [2022-03-20 13:48:23,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:48:23,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:48:23,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:48:23,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:48:23,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,076 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:48:23,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:48:23,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:48:23,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:48:23,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (1/1) ... [2022-03-20 13:48:23,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:48:23,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:23,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:48:23,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:48:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:48:23,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:48:23,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:48:23,192 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:48:23,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:48:23,284 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:48:23,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:48:23,288 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:48:23,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:48:23 BoogieIcfgContainer [2022-03-20 13:48:23,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:48:23,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:48:23,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:48:23,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:48:23,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:48:22" (1/3) ... [2022-03-20 13:48:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66510b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:48:23, skipping insertion in model container [2022-03-20 13:48:23,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:48:23" (2/3) ... [2022-03-20 13:48:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66510b35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:48:23, skipping insertion in model container [2022-03-20 13:48:23,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:48:23" (3/3) ... [2022-03-20 13:48:23,294 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll.c [2022-03-20 13:48:23,297 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:48:23,297 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:48:23,321 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:48:23,325 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:48:23,325 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:48:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:48:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 13:48:23,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:23,338 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:23,338 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:23,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 1 times [2022-03-20 13:48:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:23,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1626171038] [2022-03-20 13:48:23,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:23,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1051010973, now seen corresponding path program 2 times [2022-03-20 13:48:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:23,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999119991] [2022-03-20 13:48:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:48:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:48:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:48:23,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 13:48:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:48:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:23,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999119991] [2022-03-20 13:48:23,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999119991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:23,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:23,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:48:23,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:23,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1626171038] [2022-03-20 13:48:23,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1626171038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:23,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:23,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:48:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966638728] [2022-03-20 13:48:23,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:23,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:48:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:48:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:48:23,577 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 13:48:23,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:23,638 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-03-20 13:48:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:48:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 13:48:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:23,652 INFO L225 Difference]: With dead ends: 53 [2022-03-20 13:48:23,652 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 13:48:23,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:48:23,658 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:23,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:48:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 13:48:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 13:48:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:48:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-20 13:48:23,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-20 13:48:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:23,692 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-20 13:48:23,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 13:48:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-20 13:48:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 13:48:23,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:23,693 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:23,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:48:23,693 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 1 times [2022-03-20 13:48:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:23,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102103849] [2022-03-20 13:48:23,695 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1732856803, now seen corresponding path program 2 times [2022-03-20 13:48:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:23,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239679596] [2022-03-20 13:48:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:23,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560555842] [2022-03-20 13:48:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:48:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:23,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:23,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:48:23,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:48:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:48:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:23,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:48:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239679596] [2022-03-20 13:48:23,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560555842] [2022-03-20 13:48:23,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560555842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:23,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:23,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:48:23,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:23,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102103849] [2022-03-20 13:48:23,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102103849] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:23,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:23,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:48:23,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562652824] [2022-03-20 13:48:23,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:23,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:48:23,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:48:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:48:23,850 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 13:48:23,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:23,895 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 13:48:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:48:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 13:48:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:23,896 INFO L225 Difference]: With dead ends: 40 [2022-03-20 13:48:23,896 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 13:48:23,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:48:23,897 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:23,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:48:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 13:48:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-03-20 13:48:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:48:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-20 13:48:23,906 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2022-03-20 13:48:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:23,906 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-20 13:48:23,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 13:48:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-20 13:48:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 13:48:23,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:23,907 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:23,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:48:24,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:24,124 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -253409975, now seen corresponding path program 1 times [2022-03-20 13:48:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439722147] [2022-03-20 13:48:24,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:24,131 INFO L85 PathProgramCache]: Analyzing trace with hash -253409975, now seen corresponding path program 2 times [2022-03-20 13:48:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:24,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714029802] [2022-03-20 13:48:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:24,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:24,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:24,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531974032] [2022-03-20 13:48:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:48:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:24,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:24,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:48:24,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:48:24,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 13:48:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:24,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:48:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:24,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714029802] [2022-03-20 13:48:24,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531974032] [2022-03-20 13:48:24,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531974032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:48:24,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:48:24,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 13:48:24,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439722147] [2022-03-20 13:48:24,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439722147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:24,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:24,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:48:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880498152] [2022-03-20 13:48:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:24,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:48:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:48:24,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 13:48:24,639 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:48:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:24,805 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-03-20 13:48:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:48:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 13:48:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:24,809 INFO L225 Difference]: With dead ends: 46 [2022-03-20 13:48:24,809 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 13:48:24,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-20 13:48:24,817 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:24,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 116 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:48:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 13:48:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-20 13:48:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 30 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:48:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-03-20 13:48:24,832 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 23 [2022-03-20 13:48:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:24,832 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-03-20 13:48:24,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:48:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-03-20 13:48:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 13:48:24,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:24,835 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:24,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 13:48:25,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 13:48:25,052 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1855333828, now seen corresponding path program 1 times [2022-03-20 13:48:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:25,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600839105] [2022-03-20 13:48:25,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:48:25,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:48:25,067 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:48:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1855333828, now seen corresponding path program 2 times [2022-03-20 13:48:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:25,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624795591] [2022-03-20 13:48:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:25,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:25,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319614009] [2022-03-20 13:48:25,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:48:25,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:25,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:25,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:48:25,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:48:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 13:48:25,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:25,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:48:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:25,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:25,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624795591] [2022-03-20 13:48:25,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319614009] [2022-03-20 13:48:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319614009] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:48:25,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:48:25,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-03-20 13:48:25,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600839105] [2022-03-20 13:48:25,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600839105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:25,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:25,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:48:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941136487] [2022-03-20 13:48:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:25,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:48:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:48:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:48:25,595 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:48:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:25,976 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-20 13:48:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:48:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-03-20 13:48:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:25,977 INFO L225 Difference]: With dead ends: 48 [2022-03-20 13:48:25,977 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:48:25,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:48:25,978 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:25,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:48:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:48:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 13:48:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:48:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-20 13:48:25,986 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-03-20 13:48:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:25,986 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-20 13:48:25,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 13:48:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-20 13:48:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 13:48:25,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:25,987 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:26,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:48:26,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:26,209 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash 642754736, now seen corresponding path program 1 times [2022-03-20 13:48:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:26,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [160139088] [2022-03-20 13:48:26,211 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:48:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 642754736, now seen corresponding path program 2 times [2022-03-20 13:48:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:26,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990504618] [2022-03-20 13:48:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:26,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:26,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617157880] [2022-03-20 13:48:26,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:48:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:26,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:26,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:26,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:48:26,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:48:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 13:48:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:48:26,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:48:26,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990504618] [2022-03-20 13:48:26,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617157880] [2022-03-20 13:48:26,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617157880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:26,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:26,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:48:26,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:26,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [160139088] [2022-03-20 13:48:26,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [160139088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:26,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:26,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:48:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12012645] [2022-03-20 13:48:26,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:26,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:48:26,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:48:26,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:48:26,377 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:48:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:26,485 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-03-20 13:48:26,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:48:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-03-20 13:48:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:26,486 INFO L225 Difference]: With dead ends: 60 [2022-03-20 13:48:26,486 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 13:48:26,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:48:26,487 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:26,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 157 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:48:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 13:48:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 13:48:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 34 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:48:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-03-20 13:48:26,494 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 28 [2022-03-20 13:48:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:26,494 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-03-20 13:48:26,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:48:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-03-20 13:48:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 13:48:26,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:26,495 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:26,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:48:26,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:26,711 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash -171609494, now seen corresponding path program 1 times [2022-03-20 13:48:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [336393113] [2022-03-20 13:48:26,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:48:26,714 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:48:26,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:48:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash -171609494, now seen corresponding path program 2 times [2022-03-20 13:48:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:26,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386862052] [2022-03-20 13:48:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:26,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:26,721 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34247025] [2022-03-20 13:48:26,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:48:26,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:26,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:26,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:26,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:48:26,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:48:26,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:48:26,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 13:48:26,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:48:26,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:48:26,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386862052] [2022-03-20 13:48:26,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34247025] [2022-03-20 13:48:26,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34247025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:26,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:26,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:48:26,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:26,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [336393113] [2022-03-20 13:48:26,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [336393113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:26,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:26,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:48:26,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349851716] [2022-03-20 13:48:26,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:26,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:48:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:26,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:48:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:48:26,867 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:48:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:48:26,927 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-03-20 13:48:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:48:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-03-20 13:48:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:48:26,930 INFO L225 Difference]: With dead ends: 58 [2022-03-20 13:48:26,930 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 13:48:26,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-20 13:48:26,931 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:48:26,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:48:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 13:48:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 13:48:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 36 states have internal predecessors, (43), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 13:48:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-20 13:48:26,945 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2022-03-20 13:48:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:48:26,946 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-20 13:48:26,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:48:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-20 13:48:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:48:26,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:48:26,952 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:48:26,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 13:48:27,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:27,169 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:48:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:48:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash 212948645, now seen corresponding path program 1 times [2022-03-20 13:48:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:27,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [571845727] [2022-03-20 13:48:27,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:48:27,699 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:48:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash 791158049, now seen corresponding path program 1 times [2022-03-20 13:48:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:48:27,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616210425] [2022-03-20 13:48:27,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:27,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:48:27,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:48:27,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785897535] [2022-03-20 13:48:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:48:27,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:48:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:48:27,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:48:27,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:48:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:48:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:48:27,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:48:28,254 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:48:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:29,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:48:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:48:29,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:48:29,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616210425] [2022-03-20 13:48:29,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:48:29,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785897535] [2022-03-20 13:48:29,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785897535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:48:29,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:48:29,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-20 13:48:39,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:48:39,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [571845727] [2022-03-20 13:48:39,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [571845727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:48:39,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:48:39,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:48:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638789278] [2022-03-20 13:48:39,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:48:39,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:48:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:48:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:48:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=558, Unknown=2, NotChecked=0, Total=650 [2022-03-20 13:48:39,214 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:49:02,074 WARN L232 SmtUtils]: Spent 18.44s on a formula simplification. DAG size of input: 48 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:49:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:49:11,144 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-20 13:49:11,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:49:11,145 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-03-20 13:49:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:49:11,146 INFO L225 Difference]: With dead ends: 80 [2022-03-20 13:49:11,146 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 13:49:11,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=129, Invalid=855, Unknown=8, NotChecked=0, Total=992 [2022-03-20 13:49:11,147 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:49:11,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 245 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 205 Invalid, 0 Unknown, 93 Unchecked, 0.7s Time] [2022-03-20 13:49:11,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 13:49:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-20 13:49:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 50 states have internal predecessors, (60), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 13:49:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-03-20 13:49:11,155 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 33 [2022-03-20 13:49:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:49:11,156 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-03-20 13:49:11,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:49:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-03-20 13:49:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:49:11,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:49:11,156 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:49:11,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:49:11,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:49:11,357 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:49:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:49:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash 471114083, now seen corresponding path program 1 times [2022-03-20 13:49:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018866835] [2022-03-20 13:49:11,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:49:11,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:49:11,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:49:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 471114083, now seen corresponding path program 2 times [2022-03-20 13:49:11,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:49:11,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140218884] [2022-03-20 13:49:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:49:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:49:11,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:49:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608210191] [2022-03-20 13:49:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:49:11,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:49:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:49:11,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:49:11,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:49:11,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:49:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:49:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:49:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:49:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:49:11,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:49:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 13:49:12,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:49:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140218884] [2022-03-20 13:49:12,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:49:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608210191] [2022-03-20 13:49:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608210191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:49:12,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:49:12,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-03-20 13:49:12,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:49:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018866835] [2022-03-20 13:49:12,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018866835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:49:12,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:49:12,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:49:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055466518] [2022-03-20 13:49:12,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:49:12,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:49:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:49:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-20 13:49:12,233 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:49:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:49:13,264 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2022-03-20 13:49:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:49:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-03-20 13:49:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:49:13,265 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:49:13,265 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 13:49:13,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:49:13,266 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:49:13,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 119 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:49:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 13:49:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2022-03-20 13:49:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 59 states have internal predecessors, (76), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 13:49:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-03-20 13:49:13,291 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 33 [2022-03-20 13:49:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:49:13,291 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-03-20 13:49:13,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 13:49:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-03-20 13:49:13,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 13:49:13,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:49:13,292 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:49:13,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 13:49:13,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:49:13,497 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:49:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:49:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash 694423764, now seen corresponding path program 1 times [2022-03-20 13:49:13,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:13,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010749881] [2022-03-20 13:49:14,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 1 ReadonlyVariables, Eigenvalues: {1={2=2}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:49:14,275 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:49:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash 944336792, now seen corresponding path program 1 times [2022-03-20 13:49:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:49:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908584785] [2022-03-20 13:49:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:49:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:49:14,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:49:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112861982] [2022-03-20 13:49:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:49:14,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:49:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:49:14,292 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:49:14,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:49:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:49:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 13:49:14,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:49:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:49:15,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:49:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 13:49:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:49:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908584785] [2022-03-20 13:49:15,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:49:15,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112861982] [2022-03-20 13:49:15,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112861982] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 13:49:15,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 13:49:15,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 14 [2022-03-20 13:49:15,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:49:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010749881] [2022-03-20 13:49:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010749881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:49:15,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:49:15,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:49:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030363] [2022-03-20 13:49:15,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:49:15,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:49:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:49:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:49:15,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:49:15,717 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:49:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:49:16,545 INFO L93 Difference]: Finished difference Result 121 states and 162 transitions. [2022-03-20 13:49:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:49:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-03-20 13:49:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:49:16,545 INFO L225 Difference]: With dead ends: 121 [2022-03-20 13:49:16,545 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 13:49:16,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:49:16,547 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:49:16,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 166 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:49:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 13:49:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 13:49:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 13:49:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 13:49:16,547 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-20 13:49:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:49:16,548 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 13:49:16,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 13:49:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 13:49:16,548 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 13:49:16,550 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 13:49:16,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:49:16,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 13:49:16,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 13:49:40,913 WARN L232 SmtUtils]: Spent 23.98s on a formula simplification. DAG size of input: 58 DAG size of output: 28 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 13:49:50,175 WARN L232 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 80 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 13:50:04,502 WARN L232 SmtUtils]: Spent 14.15s on a formula simplification. DAG size of input: 45 DAG size of output: 18 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 13:50:16,239 WARN L232 SmtUtils]: Spent 11.73s on a formula simplification. DAG size of input: 71 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 13:50:22,386 WARN L232 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 90 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-20 13:50:25,286 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-20 13:50:25,287 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-20 13:50:25,287 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-20 13:50:25,287 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L33-1(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 13:50:25,287 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-20 13:50:25,287 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 58) the Hoare annotation is: true [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (<= 1 main_~y~0) [2022-03-20 13:50:25,287 INFO L885 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: true [2022-03-20 13:50:25,287 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 58) the Hoare annotation is: true [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L42(lines 42 52) the Hoare annotation is: (and (or (not (= (mod main_~b~0 2) 0)) (not (= (mod main_~a~0 2) 0))) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0)) [2022-03-20 13:50:25,287 INFO L878 garLoopResultBuilder]: At program point L38(lines 38 52) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0)) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 58) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (and (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L45(lines 45 52) the Hoare annotation is: (let ((.cse0 (not (= (mod main_~b~0 2) 0)))) (and (or .cse0 (not (= (mod main_~a~0 2) 0))) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (or .cse0 (< main_~a~0 0)) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L45-2(lines 32 53) the Hoare annotation is: (and (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:50:25,288 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 13:50:25,289 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 13:50:25,291 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-20 13:50:25,291 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 13:50:25,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 01:50:25 BoogieIcfgContainer [2022-03-20 13:50:25,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 13:50:25,306 INFO L158 Benchmark]: Toolchain (without parser) took 122408.34ms. Allocated memory was 199.2MB in the beginning and 297.8MB in the end (delta: 98.6MB). Free memory was 149.6MB in the beginning and 210.8MB in the end (delta: -61.3MB). Peak memory consumption was 146.1MB. Max. memory is 8.0GB. [2022-03-20 13:50:25,306 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 199.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 13:50:25,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.02ms. Allocated memory is still 199.2MB. Free memory was 149.3MB in the beginning and 175.5MB in the end (delta: -26.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 13:50:25,307 INFO L158 Benchmark]: Boogie Preprocessor took 22.63ms. Allocated memory is still 199.2MB. Free memory was 175.5MB in the beginning and 174.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 13:50:25,307 INFO L158 Benchmark]: RCFGBuilder took 200.96ms. Allocated memory is still 199.2MB. Free memory was 174.0MB in the beginning and 163.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 13:50:25,307 INFO L158 Benchmark]: TraceAbstraction took 122015.79ms. Allocated memory was 199.2MB in the beginning and 297.8MB in the end (delta: 98.6MB). Free memory was 163.0MB in the beginning and 210.8MB in the end (delta: -47.9MB). Peak memory consumption was 159.8MB. Max. memory is 8.0GB. [2022-03-20 13:50:25,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 199.2MB. Free memory is still 166.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.02ms. Allocated memory is still 199.2MB. Free memory was 149.3MB in the beginning and 175.5MB in the end (delta: -26.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.63ms. Allocated memory is still 199.2MB. Free memory was 175.5MB in the beginning and 174.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 200.96ms. Allocated memory is still 199.2MB. Free memory was 174.0MB in the beginning and 163.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 122015.79ms. Allocated memory was 199.2MB in the beginning and 297.8MB in the end (delta: 98.6MB). Free memory was 163.0MB in the beginning and 210.8MB in the end (delta: -47.9MB). Peak memory consumption was 159.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 122.0s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 34.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 68.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 203 mSDsluCounter, 1097 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 93 IncrementalHoareTripleChecker+Unchecked, 900 mSDsCounter, 83 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 953 IncrementalHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 83 mSolverCounterUnsat, 197 mSDtfsCounter, 953 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 399 GetRequests, 272 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 43.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, InterpolantAutomatonStates: 91, 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, 9 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 211 PreInvPairs, 325 NumberOfFragments, 251 HoareAnnotationTreeSize, 211 FomulaSimplifications, 836 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 4824 FormulaSimplificationTreeSizeReductionInter, 68.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: q + b * a * p == y * x && 1 <= y - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 13:50:25,443 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...