/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/loop-zilu/benchmark25_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:06:54,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:06:54,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:06:54,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:06:54,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:06:54,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:06:55,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:06:55,001 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 21:06:55,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:06:55,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:06:55,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:06:55,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:06:55,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:06:55,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:06:55,011 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:06:55,012 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:06:55,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:06:55,012 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:06:55,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:06:55,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:06:55,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:06:55,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:06:55,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:06:55,185 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:06:55,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark25_linear.i [2022-04-06 21:06:55,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e282c0b2a/2325d02f0cce41c089b88c46c5989b24/FLAGfc8db5835 [2022-04-06 21:06:55,562 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:06:55,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark25_linear.i [2022-04-06 21:06:55,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e282c0b2a/2325d02f0cce41c089b88c46c5989b24/FLAGfc8db5835 [2022-04-06 21:06:56,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e282c0b2a/2325d02f0cce41c089b88c46c5989b24 [2022-04-06 21:06:56,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:06:56,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:06:56,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:06:56,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:06:56,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:06:56,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a16ca07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56, skipping insertion in model container [2022-04-06 21:06:56,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:06:56,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:06:56,132 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark25_linear.i[868,881] [2022-04-06 21:06:56,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:06:56,154 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:06:56,161 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark25_linear.i[868,881] [2022-04-06 21:06:56,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:06:56,172 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:06:56,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56 WrapperNode [2022-04-06 21:06:56,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:06:56,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:06:56,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:06:56,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:06:56,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:06:56,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:06:56,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:06:56,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:06:56,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (1/1) ... [2022-04-06 21:06:56,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:06:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:56,220 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 21:06:56,227 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 21:06:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:06:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:06:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:06:56,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:06:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-06 21:06:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:06:56,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:06:56,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:06:56,296 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:06:56,298 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:06:56,381 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:06:56,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:06:56,385 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:06:56,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:06:56 BoogieIcfgContainer [2022-04-06 21:06:56,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:06:56,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:06:56,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:06:56,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:06:56,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:06:56" (1/3) ... [2022-04-06 21:06:56,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54d087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:06:56, skipping insertion in model container [2022-04-06 21:06:56,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:06:56" (2/3) ... [2022-04-06 21:06:56,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54d087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:06:56, skipping insertion in model container [2022-04-06 21:06:56,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:06:56" (3/3) ... [2022-04-06 21:06:56,391 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark25_linear.i [2022-04-06 21:06:56,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:06:56,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:06:56,445 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:06:56,455 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 21:06:56,455 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:06:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:06:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:06:56,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:56,484 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:56,485 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 1 times [2022-04-06 21:06:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974279197] [2022-04-06 21:06:56,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:06:56,502 INFO L85 PathProgramCache]: Analyzing trace with hash -304977768, now seen corresponding path program 2 times [2022-04-06 21:06:56,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:56,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241446254] [2022-04-06 21:06:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:56,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,668 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 21:06:56,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:56,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241446254] [2022-04-06 21:06:56,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241446254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:56,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:56,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:06:56,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:56,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974279197] [2022-04-06 21:06:56,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974279197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:56,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:56,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:06:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826981628] [2022-04-06 21:06:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:56,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:06:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:06:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:06:56,699 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 21:06:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:56,762 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-06 21:06:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:06:56,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-04-06 21:06:56,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:56,771 INFO L225 Difference]: With dead ends: 33 [2022-04-06 21:06:56,771 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 21:06:56,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:06:56,775 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 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 21:06:56,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 21:06:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 21:06:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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 21:06:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-04-06 21:06:56,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-04-06 21:06:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:56,804 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-04-06 21:06:56,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 21:06:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-04-06 21:06:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 21:06:56,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:56,805 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:56,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:06:56,806 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 1 times [2022-04-06 21:06:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:56,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843884661] [2022-04-06 21:06:56,818 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:56,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -828987386, now seen corresponding path program 2 times [2022-04-06 21:06:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990080828] [2022-04-06 21:06:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:56,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990080828] [2022-04-06 21:06:56,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990080828] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:06:56,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406305154] [2022-04-06 21:06:56,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:06:56,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:06:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:06:56,876 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 21:06:56,877 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 21:06:56,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:06:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:06:56,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:06:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:06:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:56,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:06:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:06:57,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406305154] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:06:57,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:06:57,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-04-06 21:06:57,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:57,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843884661] [2022-04-06 21:06:57,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843884661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:57,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:57,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:06:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441837998] [2022-04-06 21:06:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:57,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:06:57,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:06:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:06:57,012 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:06:57,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:57,058 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2022-04-06 21:06:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:06:57,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2022-04-06 21:06:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:57,060 INFO L225 Difference]: With dead ends: 20 [2022-04-06 21:06:57,060 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 21:06:57,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:06:57,061 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:57,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 21:06:57,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 21:06:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 21:06:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 21:06:57,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2022-04-06 21:06:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:57,065 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 21:06:57,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:06:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 21:06:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 21:06:57,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:06:57,066 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:06:57,087 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 21:06:57,283 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 21:06:57,284 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:06:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:06:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 3 times [2022-04-06 21:06:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:57,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465194688] [2022-04-06 21:06:57,286 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:06:57,286 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:06:57,286 INFO L85 PathProgramCache]: Analyzing trace with hash 106583640, now seen corresponding path program 4 times [2022-04-06 21:06:57,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:06:57,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060827572] [2022-04-06 21:06:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:06:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:06:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:57,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:06:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:06:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:06:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:06:57,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060827572] [2022-04-06 21:06:57,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060827572] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:57,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:57,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:06:57,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:06:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465194688] [2022-04-06 21:06:57,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465194688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:06:57,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:06:57,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:06:57,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338086690] [2022-04-06 21:06:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:06:57,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:06:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:06:57,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:06:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:06:57,370 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 21:06:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:06:57,410 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2022-04-06 21:06:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:06:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-04-06 21:06:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:06:57,411 INFO L225 Difference]: With dead ends: 15 [2022-04-06 21:06:57,411 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:06:57,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:06:57,412 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:06:57,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:06:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:06:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:06:57,413 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 21:06:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:06:57,413 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2022-04-06 21:06:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:06:57,414 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:06:57,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 21:06:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:06:57,414 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:06:57,416 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:06:57,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 21:06:57,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:06:57,468 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 11) no Hoare annotation was computed. [2022-04-06 21:06:57,468 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 11) no Hoare annotation was computed. [2022-04-06 21:06:57,469 INFO L882 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-04-06 21:06:57,469 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 27) the Hoare annotation is: true [2022-04-06 21:06:57,469 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-06 21:06:57,469 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 27) the Hoare annotation is: true [2022-04-06 21:06:57,469 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-04-06 21:06:57,469 INFO L878 garLoopResultBuilder]: At program point L22-2(lines 22 24) the Hoare annotation is: (<= main_~x~0 10) [2022-04-06 21:06:57,469 INFO L878 garLoopResultBuilder]: At program point L22-3(lines 22 24) the Hoare annotation is: (and (< 9 main_~x~0) (<= main_~x~0 10)) [2022-04-06 21:06:57,469 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 27) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 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 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:06:57,470 INFO L878 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:06:57,470 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-06 21:06:57,471 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 18) the Hoare annotation is: true [2022-04-06 21:06:57,471 INFO L885 garLoopResultBuilder]: At program point L15-2(lines 14 18) the Hoare annotation is: true [2022-04-06 21:06:57,471 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 18) the Hoare annotation is: true [2022-04-06 21:06:57,471 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:06:57,473 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2] [2022-04-06 21:06:57,474 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:06:57,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:06:57 BoogieIcfgContainer [2022-04-06 21:06:57,482 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:06:57,484 INFO L158 Benchmark]: Toolchain (without parser) took 1472.84ms. Allocated memory was 217.1MB in the beginning and 262.1MB in the end (delta: 45.1MB). Free memory was 169.4MB in the beginning and 227.9MB in the end (delta: -58.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:06:57,485 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 217.1MB. Free memory is still 185.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:06:57,486 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.26ms. Allocated memory is still 217.1MB. Free memory was 169.3MB in the beginning and 194.2MB in the end (delta: -24.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 21:06:57,486 INFO L158 Benchmark]: Boogie Preprocessor took 24.00ms. Allocated memory is still 217.1MB. Free memory was 194.2MB in the beginning and 192.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 21:06:57,486 INFO L158 Benchmark]: RCFGBuilder took 187.14ms. Allocated memory is still 217.1MB. Free memory was 192.8MB in the beginning and 183.8MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 21:06:57,487 INFO L158 Benchmark]: TraceAbstraction took 1095.03ms. Allocated memory was 217.1MB in the beginning and 262.1MB in the end (delta: 45.1MB). Free memory was 183.4MB in the beginning and 227.9MB in the end (delta: -44.6MB). Peak memory consumption was 1.3MB. Max. memory is 8.0GB. [2022-04-06 21:06:57,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 217.1MB. Free memory is still 185.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 161.26ms. Allocated memory is still 217.1MB. Free memory was 169.3MB in the beginning and 194.2MB in the end (delta: -24.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.00ms. Allocated memory is still 217.1MB. Free memory was 194.2MB in the beginning and 192.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 187.14ms. Allocated memory is still 217.1MB. Free memory was 192.8MB in the beginning and 183.8MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 1095.03ms. Allocated memory was 217.1MB in the beginning and 262.1MB in the end (delta: 45.1MB). Free memory was 183.4MB in the beginning and 227.9MB in the end (delta: -44.6MB). Peak memory consumption was 1.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 77 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 39 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 16, 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, 20 LocationsWithAnnotation, 32 PreInvPairs, 44 NumberOfFragments, 45 HoareAnnotationTreeSize, 32 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.0s 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: 22]: Loop Invariant Derived loop invariant: x <= 10 - ProcedureContractResult [Line: 19]: 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 RESULT: Ultimate proved your program to be correct! [2022-04-06 21:06:57,515 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...