/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-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:14:45,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:14:45,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:14:45,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:14:45,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:14:45,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:14:45,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:14:45,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:14:45,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:14:45,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:14:45,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:14:45,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:14:45,703 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:14:45,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:14:45,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:14:45,704 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:14:45,704 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:14:45,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:14:45,705 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:14:45,705 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:14:45,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:14:45,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:14:45,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:14:45,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:14:45,976 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:14:45,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-03-20 18:14:46,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d7210e5/758fc64a3049428eb8e1942b3d696502/FLAGe0a88d258 [2022-03-20 18:14:46,472 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:14:46,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2022-03-20 18:14:46,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d7210e5/758fc64a3049428eb8e1942b3d696502/FLAGe0a88d258 [2022-03-20 18:14:46,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55d7210e5/758fc64a3049428eb8e1942b3d696502 [2022-03-20 18:14:46,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:14:46,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:14:46,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:14:46,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:14:46,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:14:46,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:14:46" (1/1) ... [2022-03-20 18:14:46,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6822c2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:46, skipping insertion in model container [2022-03-20 18:14:46,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:14:46" (1/1) ... [2022-03-20 18:14:46,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:14:46,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:14:47,040 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-invgen/apache-get-tag.i[893,906] [2022-03-20 18:14:47,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:14:47,061 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:14:47,072 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-invgen/apache-get-tag.i[893,906] [2022-03-20 18:14:47,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:14:47,090 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:14:47,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47 WrapperNode [2022-03-20 18:14:47,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:14:47,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:14:47,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:14:47,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:14:47,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:14:47,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:14:47,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:14:47,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:14:47,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (1/1) ... [2022-03-20 18:14:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:14:47,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:47,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:14:47,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:14:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:14:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:14:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:14:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:14:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:14:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:14:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:14:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:14:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:14:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:14:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:14:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:14:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:14:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:14:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:14:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:14:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:14:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:14:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:14:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:14:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:14:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:14:47,252 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:14:47,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:14:47,448 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:14:47,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:14:47,454 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 18:14:47,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:14:47 BoogieIcfgContainer [2022-03-20 18:14:47,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:14:47,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:14:47,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:14:47,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:14:47,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:14:46" (1/3) ... [2022-03-20 18:14:47,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4322b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:14:47, skipping insertion in model container [2022-03-20 18:14:47,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:14:47" (2/3) ... [2022-03-20 18:14:47,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d4322b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:14:47, skipping insertion in model container [2022-03-20 18:14:47,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:14:47" (3/3) ... [2022-03-20 18:14:47,481 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2022-03-20 18:14:47,485 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:14:47,486 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:14:47,559 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:14:47,579 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:14:47,579 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:14:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 18:14:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 18:14:47,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:47,612 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:47,612 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 1 times [2022-03-20 18:14:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [80658975] [2022-03-20 18:14:47,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:14:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 2 times [2022-03-20 18:14:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001040759] [2022-03-20 18:14:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:47,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:14:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:47,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001040759] [2022-03-20 18:14:47,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001040759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:47,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:47,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:14:47,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:47,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [80658975] [2022-03-20 18:14:47,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [80658975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:47,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:47,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:14:47,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301857200] [2022-03-20 18:14:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:47,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:14:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:14:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:14:47,888 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-03-20 18:14:48,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:48,056 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2022-03-20 18:14:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:14:48,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2022-03-20 18:14:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:48,073 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:14:48,073 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 18:14:48,078 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 [2022-03-20 18:14:48,082 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:48,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:14:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 18:14:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 18:14:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:14:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-03-20 18:14:48,125 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2022-03-20 18:14:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:48,125 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-03-20 18:14:48,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-03-20 18:14:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-03-20 18:14:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 18:14:48,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:48,127 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:48,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:14:48,129 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:48,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 1 times [2022-03-20 18:14:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624147340] [2022-03-20 18:14:48,133 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:14:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 2 times [2022-03-20 18:14:48,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377585896] [2022-03-20 18:14:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:48,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:14:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:48,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377585896] [2022-03-20 18:14:48,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377585896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:14:48,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:48,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624147340] [2022-03-20 18:14:48,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624147340] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:14:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726568362] [2022-03-20 18:14:48,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:48,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:14:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:14:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:14:48,245 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 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) [2022-03-20 18:14:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:48,439 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-03-20 18:14:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:14:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 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 [2022-03-20 18:14:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:48,441 INFO L225 Difference]: With dead ends: 49 [2022-03-20 18:14:48,441 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 18:14:48,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:14:48,443 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:48,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:14:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 18:14:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 18:14:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 18:14:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2022-03-20 18:14:48,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2022-03-20 18:14:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:48,459 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2022-03-20 18:14:48,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 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) [2022-03-20 18:14:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2022-03-20 18:14:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:14:48,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:48,460 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:48,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:14:48,461 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 1 times [2022-03-20 18:14:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [399744089] [2022-03-20 18:14:48,462 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:14:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 2 times [2022-03-20 18:14:48,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:48,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400316408] [2022-03-20 18:14:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-20 18:14:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:14:48,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:48,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400316408] [2022-03-20 18:14:48,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400316408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:14:48,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:48,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [399744089] [2022-03-20 18:14:48,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [399744089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:14:48,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291730547] [2022-03-20 18:14:48,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:48,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:14:48,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:14:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:14:48,577 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:14:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:48,848 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-03-20 18:14:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:14:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 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 19 [2022-03-20 18:14:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:48,852 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:14:48,852 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:14:48,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:14:48,856 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:48,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:14:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:14:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-20 18:14:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 18:14:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-03-20 18:14:48,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2022-03-20 18:14:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:48,877 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-03-20 18:14:48,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:14:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-03-20 18:14:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 18:14:48,878 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:48,878 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:48,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:14:48,878 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 1 times [2022-03-20 18:14:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724577623] [2022-03-20 18:14:48,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:14:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 2 times [2022-03-20 18:14:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:48,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770098246] [2022-03-20 18:14:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 18:14:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:14:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770098246] [2022-03-20 18:14:48,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770098246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:14:48,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724577623] [2022-03-20 18:14:48,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724577623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:48,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:48,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:14:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673123498] [2022-03-20 18:14:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:48,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:14:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:14:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:14:48,984 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:14:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:49,228 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-03-20 18:14:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:14:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 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 20 [2022-03-20 18:14:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:49,232 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:14:49,232 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 18:14:49,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:14:49,235 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:49,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:14:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 18:14:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-03-20 18:14:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 18:14:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-03-20 18:14:49,248 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2022-03-20 18:14:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:49,249 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-03-20 18:14:49,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:14:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-03-20 18:14:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:14:49,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:49,251 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:49,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 18:14:49,251 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1843501053, now seen corresponding path program 1 times [2022-03-20 18:14:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1732226094] [2022-03-20 18:14:49,333 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:14:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash -153544215, now seen corresponding path program 1 times [2022-03-20 18:14:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:49,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519874608] [2022-03-20 18:14:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:49,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:49,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 18:14:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:14:49,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519874608] [2022-03-20 18:14:49,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519874608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:49,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:49,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:14:49,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:49,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1732226094] [2022-03-20 18:14:49,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1732226094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:49,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:49,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:14:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288951899] [2022-03-20 18:14:49,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:49,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:14:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:14:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:14:49,696 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:14:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:50,230 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-03-20 18:14:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:14:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-03-20 18:14:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:50,234 INFO L225 Difference]: With dead ends: 105 [2022-03-20 18:14:50,234 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 18:14:50,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:14:50,236 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 132 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:50,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 71 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 329 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-20 18:14:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 18:14:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2022-03-20 18:14:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 18:14:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-03-20 18:14:50,265 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 34 [2022-03-20 18:14:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:50,265 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-03-20 18:14:50,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 18:14:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-03-20 18:14:50,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:14:50,267 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:50,267 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:50,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 18:14:50,267 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 110874648, now seen corresponding path program 1 times [2022-03-20 18:14:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:50,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479799726] [2022-03-20 18:14:50,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:14:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 110874648, now seen corresponding path program 2 times [2022-03-20 18:14:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:50,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823327691] [2022-03-20 18:14:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 18:14:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 18:14:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-20 18:14:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 18:14:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-20 18:14:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 18:14:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:50,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823327691] [2022-03-20 18:14:50,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823327691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:14:50,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105120383] [2022-03-20 18:14:50,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:14:50,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:50,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:50,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:14:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:14:50,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:14:50,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:14:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 18:14:50,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:14:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:14:50,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:14:50,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105120383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:50,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 18:14:50,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2022-03-20 18:14:50,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:50,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479799726] [2022-03-20 18:14:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479799726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:50,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:50,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:14:50,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542151617] [2022-03-20 18:14:50,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:50,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:14:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:14:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:14:50,796 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 18:14:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:50,954 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2022-03-20 18:14:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:14:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2022-03-20 18:14:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:50,956 INFO L225 Difference]: With dead ends: 145 [2022-03-20 18:14:50,957 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 18:14:50,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:14:50,958 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:50,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 252 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:14:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 18:14:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2022-03-20 18:14:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.188235294117647) internal successors, (101), 94 states have internal predecessors, (101), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (38), 30 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 18:14:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2022-03-20 18:14:50,991 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 47 [2022-03-20 18:14:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:50,991 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2022-03-20 18:14:50,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-03-20 18:14:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2022-03-20 18:14:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:14:50,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:50,994 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:51,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 18:14:51,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-20 18:14:51,195 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash -392317006, now seen corresponding path program 1 times [2022-03-20 18:14:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:51,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386799886] [2022-03-20 18:14:51,253 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:14:51,254 INFO L85 PathProgramCache]: Analyzing trace with hash 317600390, now seen corresponding path program 1 times [2022-03-20 18:14:51,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004222392] [2022-03-20 18:14:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 18:14:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 18:14:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 18:14:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:14:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 18:14:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 18:14:51,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:51,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004222392] [2022-03-20 18:14:51,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004222392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:14:51,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61851828] [2022-03-20 18:14:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:51,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:51,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:51,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:14:51,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:14:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 18:14:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:14:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:14:51,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:14:51,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61851828] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:51,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 18:14:51,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2022-03-20 18:14:52,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:52,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386799886] [2022-03-20 18:14:52,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386799886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:52,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:52,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:14:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115406451] [2022-03-20 18:14:52,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:52,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:14:52,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:14:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:14:52,086 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 18:14:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:52,504 INFO L93 Difference]: Finished difference Result 209 states and 281 transitions. [2022-03-20 18:14:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:14:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2022-03-20 18:14:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:52,510 INFO L225 Difference]: With dead ends: 209 [2022-03-20 18:14:52,510 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 18:14:52,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:14:52,511 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:52,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 445 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 238 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-03-20 18:14:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 18:14:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 170. [2022-03-20 18:14:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 117 states have internal predecessors, (128), 49 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (47), 38 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 18:14:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 224 transitions. [2022-03-20 18:14:52,550 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 224 transitions. Word has length 61 [2022-03-20 18:14:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:52,550 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 224 transitions. [2022-03-20 18:14:52,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 15 states have internal predecessors, (31), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 18:14:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 224 transitions. [2022-03-20 18:14:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 18:14:52,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:52,553 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:52,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:14:52,783 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,SelfDestructingSolverStorable6 [2022-03-20 18:14:52,784 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash -463491686, now seen corresponding path program 1 times [2022-03-20 18:14:52,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536382609] [2022-03-20 18:14:52,844 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:14:52,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2078014524, now seen corresponding path program 1 times [2022-03-20 18:14:52,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:52,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966550623] [2022-03-20 18:14:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:52,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 18:14:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-20 18:14:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-20 18:14:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-20 18:14:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 18:14:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 18:14:52,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966550623] [2022-03-20 18:14:52,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966550623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:14:52,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326923916] [2022-03-20 18:14:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:52,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:53,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:14:53,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:14:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:53,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 18:14:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:14:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 18:14:53,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:14:53,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326923916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:53,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 18:14:53,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2022-03-20 18:14:53,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:53,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536382609] [2022-03-20 18:14:53,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536382609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:53,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:53,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:14:53,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425101707] [2022-03-20 18:14:53,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:53,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:14:53,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:53,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:14:53,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:14:53,735 INFO L87 Difference]: Start difference. First operand 170 states and 224 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 18:14:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:54,269 INFO L93 Difference]: Finished difference Result 252 states and 318 transitions. [2022-03-20 18:14:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:14:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 62 [2022-03-20 18:14:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:54,270 INFO L225 Difference]: With dead ends: 252 [2022-03-20 18:14:54,270 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 18:14:54,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:14:54,273 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 128 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:54,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 302 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 299 Invalid, 0 Unknown, 155 Unchecked, 0.3s Time] [2022-03-20 18:14:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 18:14:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 18:14:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 18:14:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 18:14:54,275 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-03-20 18:14:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:54,275 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 18:14:54,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-20 18:14:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 18:14:54,275 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 18:14:54,278 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 18:14:54,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:14:54,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:54,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 18:14:56,235 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2022-03-20 18:14:56,235 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2022-03-20 18:14:56,235 INFO L882 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2022-03-20 18:14:56,235 INFO L882 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-03-20 18:14:56,236 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:14:56,236 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:14:56,236 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2022-03-20 18:14:56,236 INFO L878 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,236 INFO L878 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,236 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 24 77) the Hoare annotation is: true [2022-03-20 18:14:56,236 INFO L878 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,236 INFO L878 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 (+ main_~tagbuf_len~0 1)) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (and (< main_~t~0 (+ main_~tagbuf_len~0 1)) (<= 1 main_~tagbuf_len~0) (<= main_~t~0 2) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L32-2(lines 32 44) the Hoare annotation is: (or (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 (+ main_~tagbuf_len~0 1)) (<= 0 main_~t~0)) (and (<= 0 main_~tagbuf_len~0) (= main_~t~0 0))) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,237 INFO L878 garLoopResultBuilder]: At program point L49(lines 49 53) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-03-20 18:14:56,238 INFO L885 garLoopResultBuilder]: At program point L74(lines 25 77) the Hoare annotation is: true [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L66(lines 66 68) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L33(lines 33 37) the Hoare annotation is: (and (<= 0 main_~tagbuf_len~0) (= main_~t~0 0)) [2022-03-20 18:14:56,238 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2022-03-20 18:14:56,238 INFO L878 garLoopResultBuilder]: At program point L54(lines 54 68) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (< main_~t~0 (+ main_~tagbuf_len~0 1)) (<= 1 main_~tagbuf_len~0) (<= main_~t~0 2) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 24 77) the Hoare annotation is: true [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L38(lines 38 40) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= 0 (+ 2147483648 |main_#t~nondet3|)) (<= |main_#t~nondet3| 2147483647) (= main_~t~0 0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,239 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 77) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L878 garLoopResultBuilder]: At program point L59(lines 59 63) the Hoare annotation is: (and (< main_~t~0 (+ main_~tagbuf_len~0 1)) (<= 1 main_~tagbuf_len~0) (<= main_~t~0 2) (<= 0 main_~t~0)) [2022-03-20 18:14:56,240 INFO L878 garLoopResultBuilder]: At program point L55(lines 55 64) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0)) (<= main_~t~0 1) (<= 0 main_~t~0)) [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,240 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:14:56,241 INFO L878 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (not (<= 1 |__VERIFIER_assert_#in~cond|)))) (and (or .cse0 (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) .cse0 (forall ((v_main_~t~0_BEFORE_CALL_23 Int)) (or (let ((.cse1 (<= 0 v_main_~t~0_BEFORE_CALL_23))) (and (or (not .cse1) (not (= |__VERIFIER_assert_#in~cond| 1))) (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse1))) (not (<= v_main_~t~0_BEFORE_CALL_23 1))))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))))) [2022-03-20 18:14:56,241 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 18:14:56,241 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (let ((.cse0 (not (<= 1 |__VERIFIER_assert_#in~cond|)))) (and (or .cse0 (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) .cse0 (forall ((v_main_~t~0_BEFORE_CALL_23 Int)) (or (let ((.cse1 (<= 0 v_main_~t~0_BEFORE_CALL_23))) (and (or (not .cse1) (not (= |__VERIFIER_assert_#in~cond| 1))) (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse1))) (not (<= v_main_~t~0_BEFORE_CALL_23 1))))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))))) [2022-03-20 18:14:56,241 INFO L878 garLoopResultBuilder]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 18:14:56,241 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-20 18:14:56,241 INFO L878 garLoopResultBuilder]: At program point L18(lines 18 20) the Hoare annotation is: (let ((.cse0 (not (<= 1 |__VERIFIER_assert_#in~cond|)))) (and (or .cse0 (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) .cse0 (forall ((v_main_~t~0_BEFORE_CALL_23 Int)) (or (let ((.cse1 (<= 0 v_main_~t~0_BEFORE_CALL_23))) (and (or (not .cse1) (not (= |__VERIFIER_assert_#in~cond| 1))) (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse1))) (not (<= v_main_~t~0_BEFORE_CALL_23 1))))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))))) [2022-03-20 18:14:56,244 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:56,246 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 18:14:56,268 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,269 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,269 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:14:56 BoogieIcfgContainer [2022-03-20 18:14:56,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 18:14:56,270 INFO L158 Benchmark]: Toolchain (without parser) took 9404.22ms. Allocated memory was 182.5MB in the beginning and 263.2MB in the end (delta: 80.7MB). Free memory was 133.6MB in the beginning and 160.2MB in the end (delta: -26.6MB). Peak memory consumption was 126.9MB. Max. memory is 8.0GB. [2022-03-20 18:14:56,271 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 182.5MB. Free memory was 149.8MB in the beginning and 149.8MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 18:14:56,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.93ms. Allocated memory is still 182.5MB. Free memory was 133.4MB in the beginning and 158.2MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 18:14:56,271 INFO L158 Benchmark]: Boogie Preprocessor took 27.13ms. Allocated memory is still 182.5MB. Free memory was 158.2MB in the beginning and 156.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 18:14:56,272 INFO L158 Benchmark]: RCFGBuilder took 336.71ms. Allocated memory is still 182.5MB. Free memory was 156.4MB in the beginning and 144.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 18:14:56,272 INFO L158 Benchmark]: TraceAbstraction took 8812.34ms. Allocated memory was 182.5MB in the beginning and 263.2MB in the end (delta: 80.7MB). Free memory was 144.4MB in the beginning and 160.2MB in the end (delta: -15.9MB). Peak memory consumption was 137.7MB. Max. memory is 8.0GB. [2022-03-20 18:14:56,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 182.5MB. Free memory was 149.8MB in the beginning and 149.8MB in the end (delta: 74.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 221.93ms. Allocated memory is still 182.5MB. Free memory was 133.4MB in the beginning and 158.2MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.13ms. Allocated memory is still 182.5MB. Free memory was 158.2MB in the beginning and 156.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 336.71ms. Allocated memory is still 182.5MB. Free memory was 156.4MB in the beginning and 144.8MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 8812.34ms. Allocated memory was 182.5MB in the beginning and 263.2MB in the end (delta: 80.7MB). Free memory was 144.4MB in the beginning and 160.2MB in the end (delta: -15.9MB). Peak memory consumption was 137.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] * 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: 19]: 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, 55 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 8, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 699 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 645 mSDsluCounter, 1304 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 343 IncrementalHoareTripleChecker+Unchecked, 944 mSDsCounter, 701 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1621 IncrementalHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 701 mSolverCounterUnsat, 360 mSDtfsCounter, 1621 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 200 SyntacticMatches, 11 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=7, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 76 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 48 LocationsWithAnnotation, 600 PreInvPairs, 915 NumberOfFragments, 488 HoareAnnotationTreeSize, 600 FomulaSimplifications, 2813 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 48 FomulaSimplificationsInter, 10694 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((1 <= tagbuf_len && t <= tagbuf_len + 1) && 0 <= t) || (0 <= tagbuf_len && t == 0) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (1 <= tagbuf_len && t <= tagbuf_len + 1) && 0 <= t - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert [2022-03-20 18:14:56,288 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,289 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,289 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,289 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,289 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] [2022-03-20 18:14:56,289 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_23,QUANTIFIED] Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && ((\old(cond) == cond || !(1 <= \old(cond))) || (forall v_main_~t~0_BEFORE_CALL_23 : int :: ((!(0 <= v_main_~t~0_BEFORE_CALL_23) || !(\old(cond) == 1)) && (!(\old(cond) == 0) || 0 <= v_main_~t~0_BEFORE_CALL_23)) || !(v_main_~t~0_BEFORE_CALL_23 <= 1)))) && (\old(cond) == 0 || !(cond == 0)) RESULT: Ultimate proved your program to be correct! [2022-03-20 18:14:56,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...