/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 07:08:54,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 07:08:54,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 07:08:54,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 07:08:54,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 07:08:54,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 07:08:54,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 07:08:54,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 07:08:54,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 07:08:54,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 07:08:54,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 07:08:54,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 07:08:54,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 07:08:54,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 07:08:54,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 07:08:54,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 07:08:54,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 07:08:54,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 07:08:54,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 07:08:54,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 07:08:54,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 07:08:54,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 07:08:54,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 07:08:54,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 07:08:54,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 07:08:54,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 07:08:54,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 07:08:54,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 07:08:54,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 07:08:54,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 07:08:54,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 07:08:54,527 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 07:08:54,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:08:54,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 07:08:54,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 07:08:54,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 07:08:54,529 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 07:08:54,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 07:08:54,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 07:08:54,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 07:08:54,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 07:08:54,853 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 07:08:54,854 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 07:08:54,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-05-01 07:08:54,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e08b9e77/9814a79a1cb5456d942bf99f0ff90946/FLAG44bb15096 [2021-05-01 07:08:55,369 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 07:08:55,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-05-01 07:08:55,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e08b9e77/9814a79a1cb5456d942bf99f0ff90946/FLAG44bb15096 [2021-05-01 07:08:55,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e08b9e77/9814a79a1cb5456d942bf99f0ff90946 [2021-05-01 07:08:55,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 07:08:55,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 07:08:55,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 07:08:55,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 07:08:55,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 07:08:55,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:08:55" (1/1) ... [2021-05-01 07:08:55,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7415233e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:55, skipping insertion in model container [2021-05-01 07:08:55,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:08:55" (1/1) ... [2021-05-01 07:08:55,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 07:08:55,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 07:08:55,940 WARN L224 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] [2021-05-01 07:08:55,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:08:55,964 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 07:08:55,976 WARN L224 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] [2021-05-01 07:08:55,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:08:56,028 INFO L208 MainTranslator]: Completed translation [2021-05-01 07:08:56,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56 WrapperNode [2021-05-01 07:08:56,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 07:08:56,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 07:08:56,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 07:08:56,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 07:08:56,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... [2021-05-01 07:08:56,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 07:08:56,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 07:08:56,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 07:08:56,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 07:08:56,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:08:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 07:08:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 07:08:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 07:08:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 07:08:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 07:08:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 07:08:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 07:08:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 07:08:56,406 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 07:08:56,407 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 07:08:56,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:08:56 BoogieIcfgContainer [2021-05-01 07:08:56,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 07:08:56,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 07:08:56,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 07:08:56,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 07:08:56,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 07:08:55" (1/3) ... [2021-05-01 07:08:56,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adb78df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:08:56, skipping insertion in model container [2021-05-01 07:08:56,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:56" (2/3) ... [2021-05-01 07:08:56,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4adb78df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:08:56, skipping insertion in model container [2021-05-01 07:08:56,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:08:56" (3/3) ... [2021-05-01 07:08:56,415 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-05-01 07:08:56,419 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 07:08:56,423 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 07:08:56,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 07:08:56,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 07:08:56,465 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 07:08:56,465 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 07:08:56,466 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 07:08:56,466 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 07:08:56,466 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 07:08:56,466 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 07:08:56,466 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 07:08:56,483 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) [2021-05-01 07:08:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-01 07:08:56,491 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:56,491 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:56,492 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:56,498 INFO L82 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 1 times [2021-05-01 07:08:56,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:56,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524116700] [2021-05-01 07:08:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:56,559 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:56,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:56,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:56,667 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:56,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:56,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:56,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:56,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:56,728 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524116700] [2021-05-01 07:08:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [524116700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:56,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:56,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 07:08:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385693051] [2021-05-01 07:08:56,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 07:08:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 07:08:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:08:56,751 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) [2021-05-01 07:08:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:56,967 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2021-05-01 07:08:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 07:08:56,970 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 [2021-05-01 07:08:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:56,978 INFO L225 Difference]: With dead ends: 88 [2021-05-01 07:08:56,979 INFO L226 Difference]: Without dead ends: 43 [2021-05-01 07:08:56,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:08:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-01 07:08:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-01 07:08:57,037 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) [2021-05-01 07:08:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-05-01 07:08:57,039 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2021-05-01 07:08:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:57,039 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-05-01 07:08:57,040 INFO L481 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) [2021-05-01 07:08:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-05-01 07:08:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 07:08:57,040 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:57,040 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:57,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 07:08:57,041 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 1 times [2021-05-01 07:08:57,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:57,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924589506] [2021-05-01 07:08:57,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:57,044 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:57,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,114 INFO L142 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-05-01 07:08:57,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:57,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:57,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:57,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:57,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:57,188 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:57,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924589506] [2021-05-01 07:08:57,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924589506] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:57,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:57,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:08:57,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482159666] [2021-05-01 07:08:57,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:08:57,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:08:57,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 07:08:57,190 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) [2021-05-01 07:08:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:57,483 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-01 07:08:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:08:57,483 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 [2021-05-01 07:08:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:57,489 INFO L225 Difference]: With dead ends: 49 [2021-05-01 07:08:57,489 INFO L226 Difference]: Without dead ends: 47 [2021-05-01 07:08:57,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 07:08:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-01 07:08:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-01 07:08:57,512 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) [2021-05-01 07:08:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-01 07:08:57,516 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2021-05-01 07:08:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:57,520 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-01 07:08:57,520 INFO L481 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) [2021-05-01 07:08:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-01 07:08:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 07:08:57,521 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:57,521 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:57,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 07:08:57,522 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 1 times [2021-05-01 07:08:57,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:57,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041629295] [2021-05-01 07:08:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:57,530 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:57,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,582 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,585 INFO L142 QuantifierPusher]: treesize reduction 5, result has 80.0 percent of original size [2021-05-01 07:08:57,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-05-01 07:08:57,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 07:08:57,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:57,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:57,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:57,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:57,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:57,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:57,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:57,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041629295] [2021-05-01 07:08:57,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2041629295] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:57,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:57,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 07:08:57,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499399365] [2021-05-01 07:08:57,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 07:08:57,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 07:08:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:08:57,642 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) [2021-05-01 07:08:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:57,939 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2021-05-01 07:08:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 07:08:57,940 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 [2021-05-01 07:08:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:57,942 INFO L225 Difference]: With dead ends: 62 [2021-05-01 07:08:57,943 INFO L226 Difference]: Without dead ends: 50 [2021-05-01 07:08:57,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-01 07:08:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-01 07:08:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-05-01 07:08:57,966 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) [2021-05-01 07:08:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-05-01 07:08:57,967 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2021-05-01 07:08:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:57,968 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-05-01 07:08:57,968 INFO L481 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) [2021-05-01 07:08:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-05-01 07:08:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-01 07:08:57,970 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:57,970 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:57,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 07:08:57,970 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 1 times [2021-05-01 07:08:57,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:57,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036776220] [2021-05-01 07:08:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:57,975 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:58,027 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 07:08:58,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:58,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:58,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 07:08:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:58,106 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:58,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036776220] [2021-05-01 07:08:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1036776220] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:58,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:58,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 07:08:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596482930] [2021-05-01 07:08:58,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 07:08:58,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:58,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 07:08:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:08:58,107 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) [2021-05-01 07:08:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:58,424 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-01 07:08:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 07:08:58,425 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 [2021-05-01 07:08:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:58,426 INFO L225 Difference]: With dead ends: 60 [2021-05-01 07:08:58,426 INFO L226 Difference]: Without dead ends: 58 [2021-05-01 07:08:58,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-01 07:08:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-01 07:08:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-05-01 07:08:58,436 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) [2021-05-01 07:08:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-01 07:08:58,436 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2021-05-01 07:08:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:58,437 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-01 07:08:58,437 INFO L481 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) [2021-05-01 07:08:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-01 07:08:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-01 07:08:58,438 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:58,438 INFO L519 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] [2021-05-01 07:08:58,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 07:08:58,438 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1843501053, now seen corresponding path program 1 times [2021-05-01 07:08:58,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:58,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288647884] [2021-05-01 07:08:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:58,461 INFO L142 QuantifierPusher]: treesize reduction 8, result has 71.4 percent of original size [2021-05-01 07:08:58,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 07:08:58,472 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (= |v_main_#t~nondet5_7| 0) (not (= v_main_~t~0_52 v_main_~tagbuf_len~0_31)) (<= v_main_~t~0_52 v_main_~tagbuf_len~0_31) (<= 0 v_main_~t~0_52)) InVars {main_#t~nondet5=|v_main_#t~nondet5_7|, main_~t~0=v_main_~t~0_52, main_~tagbuf_len~0=v_main_~tagbuf_len~0_31} OutVars{main_#t~nondet5=|v_main_#t~nondet5_7|, main_~t~0=v_main_~t~0_52, main_~tagbuf_len~0=v_main_~tagbuf_len~0_31} AuxVars[] AssignedVars[] [2021-05-01 07:08:58,483 WARN L240 tifierPushTermWalker]: treesize reduction 9, result has 91.9 percent of original size [2021-05-01 07:08:58,487 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,488 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,492 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,499 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,504 INFO L108 tifierPushTermWalker]: treesize reduction 4, result has 20.0 percent of original size [2021-05-01 07:08:58,506 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,508 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 07:08:58,517 INFO L732 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-05-01 07:08:58,521 INFO L739 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,524 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,529 INFO L108 tifierPushTermWalker]: treesize reduction 4, result has 20.0 percent of original size [2021-05-01 07:08:58,532 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,537 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:08:58,538 INFO L108 tifierPushTermWalker]: treesize reduction 6, result has 14.3 percent of original size [2021-05-01 07:08:58,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-01 07:08:58,542 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,543 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 07:08:58,545 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,548 INFO L118 tifierPushTermWalker]: treesize reduction 3, result has 25.0 percent of original size [2021-05-01 07:08:58,552 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,554 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,557 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,562 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:08:58,565 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:08:58,567 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,577 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:08:58,580 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,584 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,586 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,588 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,592 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,595 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,597 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,599 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,603 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,604 WARN L245 tifierPushTermWalker]: treesize reduction 9, result has 91.9 percent of original size 102 [2021-05-01 07:08:58,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-05-01 07:08:58,628 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:08:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:58,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,661 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 07:08:58,666 INFO L142 QuantifierPusher]: treesize reduction 5, result has 50.0 percent of original size [2021-05-01 07:08:58,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:58,670 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:58,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:58,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 07:08:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:58,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:58,709 INFO L142 QuantifierPusher]: treesize reduction 6, result has 90.9 percent of original size [2021-05-01 07:08:58,712 INFO L147 QuantifierPusher]: treesize reduction 15, result has 62.5 percent of original size 25 [2021-05-01 07:08:58,764 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-05-01 07:08:58,767 INFO L142 QuantifierPusher]: treesize reduction 4, result has 89.2 percent of original size [2021-05-01 07:08:58,768 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-05-01 07:08:58,794 INFO L142 QuantifierPusher]: treesize reduction 22, result has 40.5 percent of original size [2021-05-01 07:08:58,795 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 07:08:58,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 07:08:58,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 07:08:58,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-01 07:08:58,839 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,840 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 07:08:58,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,855 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 07:08:58,864 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-01 07:08:58,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,875 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 07:08:58,876 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 07:08:58,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:08:58,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 07:08:58,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,912 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:08:58,913 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 07:08:58,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:08:58,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 07:08:58,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:08:58,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 07:08:58,966 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:08:58,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 07:08:58,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:08:58,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-01 07:08:58,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-05-01 07:08:58,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:58,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:59,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,001 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:59,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288647884] [2021-05-01 07:08:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [288647884] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:59,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:59,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-01 07:08:59,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146793243] [2021-05-01 07:08:59,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-01 07:08:59,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-01 07:08:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-01 07:08:59,003 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), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 07:08:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:59,559 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-01 07:08:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-01 07:08:59,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-01 07:08:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:59,562 INFO L225 Difference]: With dead ends: 66 [2021-05-01 07:08:59,562 INFO L226 Difference]: Without dead ends: 64 [2021-05-01 07:08:59,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-05-01 07:08:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-01 07:08:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-05-01 07:08:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-01 07:08:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-05-01 07:08:59,574 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 34 [2021-05-01 07:08:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:59,574 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-05-01 07:08:59,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 07:08:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-05-01 07:08:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-01 07:08:59,575 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:59,575 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:59,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 07:08:59,575 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1506705033, now seen corresponding path program 1 times [2021-05-01 07:08:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:59,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385100155] [2021-05-01 07:08:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:59,578 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:59,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:59,610 INFO L142 QuantifierPusher]: treesize reduction 13, result has 66.7 percent of original size [2021-05-01 07:08:59,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-05-01 07:08:59,621 INFO L142 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-05-01 07:08:59,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 07:08:59,633 INFO L142 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-05-01 07:08:59,637 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-05-01 07:08:59,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:59,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,653 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:59,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:59,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,687 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 07:08:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:59,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-01 07:08:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:59,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-01 07:08:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:59,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:59,714 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:59,715 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385100155] [2021-05-01 07:08:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385100155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:59,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:59,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 07:08:59,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474199783] [2021-05-01 07:08:59,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 07:08:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 07:08:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-01 07:08:59,717 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-01 07:09:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:09:00,065 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2021-05-01 07:09:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 07:09:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-01 07:09:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:09:00,067 INFO L225 Difference]: With dead ends: 94 [2021-05-01 07:09:00,067 INFO L226 Difference]: Without dead ends: 90 [2021-05-01 07:09:00,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-01 07:09:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-01 07:09:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-05-01 07:09:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 56 states have internal predecessors, (61), 24 states have call successors, (24), 9 states have call predecessors, (24), 7 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-01 07:09:00,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-05-01 07:09:00,082 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 35 [2021-05-01 07:09:00,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:09:00,082 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-05-01 07:09:00,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-01 07:09:00,082 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-05-01 07:09:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-01 07:09:00,083 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:09:00,083 INFO L519 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] [2021-05-01 07:09:00,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 07:09:00,084 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:09:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:09:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 110874648, now seen corresponding path program 1 times [2021-05-01 07:09:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:09:00,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022218689] [2021-05-01 07:09:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:09:00,086 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:09:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,109 INFO L142 QuantifierPusher]: treesize reduction 13, result has 23.5 percent of original size [2021-05-01 07:09:00,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:09:00,111 INFO L142 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-05-01 07:09:00,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:09:00,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:09:00,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:09:00,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:09:00,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:09:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 07:09:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-01 07:09:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-01 07:09:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-05-01 07:09:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,157 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,158 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:09:00,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:09:00,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-01 07:09:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:09:00,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:09:00,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:09:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 07:09:00,167 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:09:00,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022218689] [2021-05-01 07:09:00,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022218689] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:09:00,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:09:00,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 07:09:00,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650051550] [2021-05-01 07:09:00,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 07:09:00,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:09:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 07:09:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-01 07:09:00,169 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-01 07:09:00,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:09:00,450 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-01 07:09:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 07:09:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-01 07:09:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:09:00,451 INFO L225 Difference]: With dead ends: 84 [2021-05-01 07:09:00,451 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 07:09:00,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-01 07:09:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 07:09:00,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 07:09:00,455 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) [2021-05-01 07:09:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 07:09:00,456 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-05-01 07:09:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:09:00,456 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 07:09:00,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-01 07:09:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 07:09:00,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 07:09:00,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 07:09:00,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 07:09:01,657 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-01 07:09:01,658 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-01 07:09:01,658 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:09:01,658 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-01 07:09:01,658 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:09:01,658 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:09:01,659 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L60(line 60) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L60-1(line 60) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,659 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 24 77) the Hoare annotation is: true [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L56-1(line 56) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L48-3(lines 48 72) the Hoare annotation is: (let ((.cse0 (= (ite (<= 0 main_~t~0) 1 0) 1))) (or (and (<= main_~t~0 1) (< 0 main_~tagbuf_len~0) .cse0) (and (< main_~t~0 main_~tagbuf_len~0) .cse0))) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L73(line 73) the Hoare annotation is: (let ((.cse0 (= (ite (<= 0 main_~t~0) 1 0) 1))) (or (and (<= main_~t~0 1) (< 0 main_~tagbuf_len~0) .cse0) (and (< main_~t~0 main_~tagbuf_len~0) .cse0))) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L69(line 69) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L57(line 57) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,659 INFO L194 CegarLoopUtils]: At program point L49(lines 49 53) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L201 CegarLoopUtils]: At program point L74(lines 25 77) the Hoare annotation is: true [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L70(line 70) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L66(lines 66 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L33(lines 33 37) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L201 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: (<= 1 main_~tagbuf_len~0) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L54(lines 54 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,660 INFO L194 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,660 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 24 77) the Hoare annotation is: true [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (and (= (ite (<= 0 main_~t~0) 1 0) 1) (< main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L38(lines 38 40) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-01 07:09:01,661 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 77) the Hoare annotation is: true [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L59(lines 59 63) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 1 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L55(lines 55 64) the Hoare annotation is: (and (< main_~t~0 main_~tagbuf_len~0) (= (ite (<= 0 main_~t~0) 1 0) 1)) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (= |__VERIFIER_assert_#in~cond| 0))) (and (or .cse0 (not (= __VERIFIER_assert_~cond 0))) (or .cse0 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~t~0_BEFORE_CALL_2 Int) (v_main_~tagbuf_len~0_BEFORE_CALL_2 Int)) (or (not (= (ite (<= 0 v_main_~t~0_BEFORE_CALL_2) 1 0) 1)) (not (= (ite (<= v_main_~t~0_BEFORE_CALL_2 v_main_~tagbuf_len~0_BEFORE_CALL_2) 1 0) |__VERIFIER_assert_#in~cond|))))))) [2021-05-01 07:09:01,661 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (let ((.cse0 (= |__VERIFIER_assert_#in~cond| 0))) (and (or .cse0 (not (= __VERIFIER_assert_~cond 0))) (or .cse0 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~t~0_BEFORE_CALL_2 Int) (v_main_~tagbuf_len~0_BEFORE_CALL_2 Int)) (or (not (= (ite (<= 0 v_main_~t~0_BEFORE_CALL_2) 1 0) 1)) (not (= (ite (<= v_main_~t~0_BEFORE_CALL_2 v_main_~tagbuf_len~0_BEFORE_CALL_2) 1 0) |__VERIFIER_assert_#in~cond|))))))) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:09:01,661 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (let ((.cse0 (= |__VERIFIER_assert_#in~cond| 0))) (and (or .cse0 (not (= __VERIFIER_assert_~cond 0))) (or .cse0 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (forall ((v_main_~t~0_BEFORE_CALL_2 Int) (v_main_~tagbuf_len~0_BEFORE_CALL_2 Int)) (or (not (= (ite (<= 0 v_main_~t~0_BEFORE_CALL_2) 1 0) 1)) (not (= (ite (<= v_main_~t~0_BEFORE_CALL_2 v_main_~tagbuf_len~0_BEFORE_CALL_2) 1 0) |__VERIFIER_assert_#in~cond|))))))) [2021-05-01 07:09:01,675 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,676 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,676 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~tagbuf_len~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 07:09:01 BoogieIcfgContainer [2021-05-01 07:09:01,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 07:09:01,677 INFO L168 Benchmark]: Toolchain (without parser) took 5905.51 ms. Allocated memory was 182.5 MB in the beginning and 263.2 MB in the end (delta: 80.7 MB). Free memory was 148.6 MB in the beginning and 224.3 MB in the end (delta: -75.7 MB). Peak memory consumption was 136.2 MB. Max. memory is 8.0 GB. [2021-05-01 07:09:01,678 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory was 165.1 MB in the beginning and 164.9 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 07:09:01,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.51 ms. Allocated memory is still 182.5 MB. Free memory was 148.3 MB in the beginning and 165.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-01 07:09:01,678 INFO L168 Benchmark]: Boogie Preprocessor took 35.58 ms. Allocated memory is still 182.5 MB. Free memory was 165.9 MB in the beginning and 164.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 07:09:01,678 INFO L168 Benchmark]: RCFGBuilder took 342.24 ms. Allocated memory is still 182.5 MB. Free memory was 164.3 MB in the beginning and 146.0 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-01 07:09:01,679 INFO L168 Benchmark]: TraceAbstraction took 5267.11 ms. Allocated memory was 182.5 MB in the beginning and 263.2 MB in the end (delta: 80.7 MB). Free memory was 145.4 MB in the beginning and 224.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 134.0 MB. Max. memory is 8.0 GB. [2021-05-01 07:09:01,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 182.5 MB. Free memory was 165.1 MB in the beginning and 164.9 MB in the end (delta: 140.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.51 ms. Allocated memory is still 182.5 MB. Free memory was 148.3 MB in the beginning and 165.9 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.58 ms. Allocated memory is still 182.5 MB. Free memory was 165.9 MB in the beginning and 164.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.24 ms. Allocated memory is still 182.5 MB. Free memory was 164.3 MB in the beginning and 146.0 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5267.11 ms. Allocated memory was 182.5 MB in the beginning and 263.2 MB in the end (delta: 80.7 MB). Free memory was 145.4 MB in the beginning and 224.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 134.0 MB. Max. memory is 8.0 GB. * 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_2,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~tagbuf_len~0_BEFORE_CALL_2,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: SAFE, OverallTime: 3994.0ms, OverallIterations: 7, TraceHistogramMax: 6, EmptinessCheckTime: 18.8ms, AutomataDifference: 2369.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1200.3ms, InitialAbstractionConstructionTime: 12.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 261 SDtfs, 408 SDslu, 335 SDs, 0 SdLazy, 1122 SolverSat, 467 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1012.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1164.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=6, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 126.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 48 LocationsWithAnnotation, 318 PreInvPairs, 463 NumberOfFragments, 513 HoareAnnotationTreeSize, 318 FomulaSimplifications, 5381 FormulaSimplificationTreeSizeReduction, 378.9ms HoareSimplificationTime, 48 FomulaSimplificationsInter, 2958 FormulaSimplificationTreeSizeReductionInter, 780.9ms 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: t <= tagbuf_len && (if 0 <= t then 1 else 0) == 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (t <= tagbuf_len && 1 <= tagbuf_len) && (if 0 <= t then 1 else 0) == 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~tagbuf_len~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~t~0_BEFORE_CALL_2,QUANTIFIED] [2021-05-01 07:09:01,683 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~tagbuf_len~0_BEFORE_CALL_2,QUANTIFIED] Derived contract for procedure __VERIFIER_assert: (\old(cond) == 0 || !(cond == 0)) && ((\old(cond) == 0 || \old(cond) == cond) || (forall v_main_~t~0_BEFORE_CALL_2 : int, v_main_~tagbuf_len~0_BEFORE_CALL_2 : int :: !((if 0 <= v_main_~t~0_BEFORE_CALL_2 then 1 else 0) == 1) || !((if v_main_~t~0_BEFORE_CALL_2 <= v_main_~tagbuf_len~0_BEFORE_CALL_2 then 1 else 0) == \old(cond)))) RESULT: Ultimate proved your program to be correct! Received shutdown request...