/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:15:49,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:15:49,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:15:49,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:15:49,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:15:49,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:15:49,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:15:49,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:15:49,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:15:49,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:15:49,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:15:49,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:15:49,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:15:49,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:15:49,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:15:49,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:15:49,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:15:49,463 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:15:49,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:15:49,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:15:49,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:15:49,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:15:49,464 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:15:49,465 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:15:49,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:15:49,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:15:49,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:15:49,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:15:49,781 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:15:49,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2-ll.c [2022-04-06 21:15:49,841 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9857407c2/14900c101f364ec4aa89cd66ace69493/FLAG1127a1fcd [2022-04-06 21:15:50,198 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:15:50,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2-ll.c [2022-04-06 21:15:50,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9857407c2/14900c101f364ec4aa89cd66ace69493/FLAG1127a1fcd [2022-04-06 21:15:50,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9857407c2/14900c101f364ec4aa89cd66ace69493 [2022-04-06 21:15:50,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:15:50,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:15:50,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:15:50,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:15:50,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:15:50,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468763f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50, skipping insertion in model container [2022-04-06 21:15:50,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:15:50,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:15:50,483 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/geo2-ll.c[525,538] [2022-04-06 21:15:50,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:15:50,510 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:15:50,521 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/geo2-ll.c[525,538] [2022-04-06 21:15:50,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:15:50,545 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:15:50,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50 WrapperNode [2022-04-06 21:15:50,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:15:50,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:15:50,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:15:50,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:15:50,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:15:50,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:15:50,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:15:50,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:15:50,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (1/1) ... [2022-04-06 21:15:50,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:15:50,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:50,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:15:50,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:15:50,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:15:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:15:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:15:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:15:50,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:15:50,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:15:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:15:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:15:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:15:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:15:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:15:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:15:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:15:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:15:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:15:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:15:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:15:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:15:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:15:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:15:50,727 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:15:50,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:15:50,828 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:15:50,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:15:50,834 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:15:50,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:15:50 BoogieIcfgContainer [2022-04-06 21:15:50,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:15:50,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:15:50,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:15:50,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:15:50,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:15:50" (1/3) ... [2022-04-06 21:15:50,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d3fd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:15:50, skipping insertion in model container [2022-04-06 21:15:50,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:50" (2/3) ... [2022-04-06 21:15:50,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d3fd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:15:50, skipping insertion in model container [2022-04-06 21:15:50,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:15:50" (3/3) ... [2022-04-06 21:15:50,851 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll.c [2022-04-06 21:15:50,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:15:50,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:15:50,914 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:15:50,933 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:15:50,933 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:15:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:15:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 21:15:50,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:50,961 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:50,964 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 1 times [2022-04-06 21:15:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:50,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008214996] [2022-04-06 21:15:50,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1469283919, now seen corresponding path program 2 times [2022-04-06 21:15:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818831794] [2022-04-06 21:15:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:15:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:15:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:51,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818831794] [2022-04-06 21:15:51,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818831794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:51,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:51,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:15:51,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:51,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008214996] [2022-04-06 21:15:51,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008214996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:51,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:51,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:15:51,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463941530] [2022-04-06 21:15:51,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:51,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:15:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:15:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:15:51,258 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:15:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:51,338 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-04-06 21:15:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:15:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 21:15:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:51,351 INFO L225 Difference]: With dead ends: 36 [2022-04-06 21:15:51,352 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 21:15:51,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:15:51,361 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:51,363 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 21:15:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-06 21:15:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:15:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-06 21:15:51,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-04-06 21:15:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:51,414 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-06 21:15:51,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:15:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-06 21:15:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 21:15:51,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:51,416 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:51,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:15:51,416 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 1 times [2022-04-06 21:15:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:51,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651724350] [2022-04-06 21:15:51,423 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1467496459, now seen corresponding path program 2 times [2022-04-06 21:15:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:51,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837226808] [2022-04-06 21:15:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:51,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:51,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929263689] [2022-04-06 21:15:51,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:51,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:51,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:15:51,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:15:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:15:51,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:15:51,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837226808] [2022-04-06 21:15:51,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929263689] [2022-04-06 21:15:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929263689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:51,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:51,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:51,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651724350] [2022-04-06 21:15:51,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651724350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:51,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:51,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284733315] [2022-04-06 21:15:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:51,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:51,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:15:51,651 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:15:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:51,719 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-06 21:15:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:15:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 21:15:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:51,721 INFO L225 Difference]: With dead ends: 26 [2022-04-06 21:15:51,721 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 21:15:51,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:15:51,722 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:51,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 21:15:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 21:15:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:15:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 21:15:51,730 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2022-04-06 21:15:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:51,730 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 21:15:51,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:15:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 21:15:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:15:51,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:51,731 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:51,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:51,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:51,948 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 1 times [2022-04-06 21:15:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677842962] [2022-04-06 21:15:51,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:15:51,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:15:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1366100723, now seen corresponding path program 2 times [2022-04-06 21:15:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:51,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963887885] [2022-04-06 21:15:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:52,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:52,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366648270] [2022-04-06 21:15:52,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:52,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:52,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:52,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:15:52,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:15:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:15:52,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:15:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963887885] [2022-04-06 21:15:52,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:52,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366648270] [2022-04-06 21:15:52,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366648270] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:15:52,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:15:52,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-04-06 21:15:52,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:52,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677842962] [2022-04-06 21:15:52,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677842962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:52,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:52,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:15:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375484604] [2022-04-06 21:15:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:52,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:15:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:15:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:15:52,463 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:15:52,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:52,498 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-04-06 21:15:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:15:52,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-06 21:15:52,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:52,500 INFO L225 Difference]: With dead ends: 23 [2022-04-06 21:15:52,500 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:15:52,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:15:52,502 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:52,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:15:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:15:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:15:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:15:52,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-04-06 21:15:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:52,504 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:15:52,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:15:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:15:52,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:15:52,507 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:15:52,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:52,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:15:52,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:15:52,872 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 21:15:52,872 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-06 21:15:52,873 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 33 42) the Hoare annotation is: (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) [2022-04-06 21:15:52,874 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 42) the Hoare annotation is: (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) [2022-04-06 21:15:52,874 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 42) the Hoare annotation is: (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) [2022-04-06 21:15:52,875 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 23 45) the Hoare annotation is: true [2022-04-06 21:15:52,875 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 45) the Hoare annotation is: true [2022-04-06 21:15:52,876 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 45) the Hoare annotation is: true [2022-04-06 21:15:52,876 INFO L885 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: true [2022-04-06 21:15:52,876 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) [2022-04-06 21:15:52,876 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,876 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 21:15:52,876 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,876 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,877 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,877 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:15:52,877 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 21:15:52,877 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 21:15:52,877 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 21:15:52,877 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 21:15:52,877 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 21:15:52,878 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 21:15:52,881 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2] [2022-04-06 21:15:52,883 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:15:52,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:15:52 BoogieIcfgContainer [2022-04-06 21:15:52,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:15:52,908 INFO L158 Benchmark]: Toolchain (without parser) took 2676.34ms. Allocated memory was 181.4MB in the beginning and 257.9MB in the end (delta: 76.5MB). Free memory was 134.6MB in the beginning and 209.7MB in the end (delta: -75.1MB). Peak memory consumption was 2.4MB. Max. memory is 8.0GB. [2022-04-06 21:15:52,908 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 181.4MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:15:52,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.93ms. Allocated memory is still 181.4MB. Free memory was 134.4MB in the beginning and 159.4MB in the end (delta: -25.1MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. [2022-04-06 21:15:52,912 INFO L158 Benchmark]: Boogie Preprocessor took 42.51ms. Allocated memory is still 181.4MB. Free memory was 159.4MB in the beginning and 157.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 21:15:52,915 INFO L158 Benchmark]: RCFGBuilder took 244.45ms. Allocated memory is still 181.4MB. Free memory was 157.8MB in the beginning and 148.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 21:15:52,915 INFO L158 Benchmark]: TraceAbstraction took 2070.17ms. Allocated memory was 181.4MB in the beginning and 257.9MB in the end (delta: 76.5MB). Free memory was 147.7MB in the beginning and 209.7MB in the end (delta: -62.0MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. [2022-04-06 21:15:52,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 181.4MB. Free memory is still 150.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 310.93ms. Allocated memory is still 181.4MB. Free memory was 134.4MB in the beginning and 159.4MB in the end (delta: -25.1MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.51ms. Allocated memory is still 181.4MB. Free memory was 159.4MB in the beginning and 157.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 244.45ms. Allocated memory is still 181.4MB. Free memory was 157.8MB in the beginning and 148.4MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 2070.17ms. Allocated memory was 181.4MB in the beginning and 257.9MB in the end (delta: 76.5MB). Free memory was 147.7MB in the beginning and 209.7MB in the end (delta: -62.0MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.0s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43 IncrementalHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 45 mSDtfsCounter, 43 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 51 PreInvPairs, 76 NumberOfFragments, 94 HoareAnnotationTreeSize, 51 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 77 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: x + z * y == z * x + 1 - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(1 <= \old(cond)) || 1 <= cond RESULT: Ultimate proved your program to be correct! [2022-04-06 21:15:52,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...