/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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 06:44:44,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 06:44:44,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 06:44:44,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 06:44:44,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 06:44:44,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 06:44:44,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 06:44:44,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 06:44:44,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 06:44:44,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 06:44:44,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 06:44:44,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 06:44:44,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 06:44:44,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 06:44:44,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 06:44:44,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 06:44:44,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 06:44:44,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 06:44:44,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 06:44:44,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 06:44:44,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 06:44:44,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 06:44:44,723 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 06:44:44,723 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 06:44:44,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 06:44:44,724 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 06:44:44,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 06:44:44,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 06:44:44,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 06:44:44,739 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 06:44:44,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 06:44:44,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 06:44:44,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 06:44:44,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 06:44:44,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 06:44:44,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 06:44:44,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 06:44:44,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 06:44:44,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 06:44:44,743 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 06:44:44,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 06:44:44,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 06:44:44,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 06:44:44,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 06:44:44,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 06:44:44,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 06:44:44,745 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 06:44:44,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 06:44:45,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 06:44:45,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 06:44:45,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 06:44:45,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 06:44:45,030 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 06:44:45,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-04-16 06:44:45,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9389ba/9184625ee7ad468f97e0572ddb1d7567/FLAGd75ef9d03 [2021-04-16 06:44:45,452 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 06:44:45,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-04-16 06:44:45,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9389ba/9184625ee7ad468f97e0572ddb1d7567/FLAGd75ef9d03 [2021-04-16 06:44:45,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10e9389ba/9184625ee7ad468f97e0572ddb1d7567 [2021-04-16 06:44:45,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 06:44:45,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 06:44:45,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 06:44:45,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 06:44:45,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 06:44:45,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c114afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45, skipping insertion in model container [2021-04-16 06:44:45,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 06:44:45,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 06:44:45,616 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-04-16 06:44:45,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 06:44:45,632 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 06:44:45,641 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2021-04-16 06:44:45,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 06:44:45,656 INFO L208 MainTranslator]: Completed translation [2021-04-16 06:44:45,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45 WrapperNode [2021-04-16 06:44:45,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 06:44:45,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 06:44:45,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 06:44:45,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 06:44:45,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (1/1) ... [2021-04-16 06:44:45,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 06:44:45,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 06:44:45,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 06:44:45,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 06:44:45,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (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 [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 06:44:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 06:44:45,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 06:44:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 06:44:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 06:44:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 06:44:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 06:44:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 06:44:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 06:44:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 06:44:45,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 06:44:45,973 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 06:44:45,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 06:44:45 BoogieIcfgContainer [2021-04-16 06:44:45,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 06:44:45,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 06:44:45,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 06:44:45,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 06:44:45,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 06:44:45" (1/3) ... [2021-04-16 06:44:45,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32097d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 06:44:45, skipping insertion in model container [2021-04-16 06:44:45,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 06:44:45" (2/3) ... [2021-04-16 06:44:45,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32097d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 06:44:45, skipping insertion in model container [2021-04-16 06:44:45,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 06:44:45" (3/3) ... [2021-04-16 06:44:45,979 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-04-16 06:44:45,983 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 06:44:45,985 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 06:44:45,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 06:44:46,026 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 06:44:46,026 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 06:44:46,026 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 06:44:46,026 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 06:44:46,026 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 06:44:46,026 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 06:44:46,026 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 06:44:46,026 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 06:44:46,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-16 06:44:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 06:44:46,055 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 06:44:46,056 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 06:44:46,056 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 06:44:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 06:44:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-04-16 06:44:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 06:44:46,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720587970] [2021-04-16 06:44:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 06:44:46,124 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 06:44:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 06:44:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 06:44:46,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720587970] [2021-04-16 06:44:46,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 06:44:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 06:44:46,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578901349] [2021-04-16 06:44:46,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 06:44:46,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 06:44:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 06:44:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 06:44:46,259 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 06:44:46,335 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-04-16 06:44:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 06:44:46,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 06:44:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 06:44:46,341 INFO L225 Difference]: With dead ends: 41 [2021-04-16 06:44:46,342 INFO L226 Difference]: Without dead ends: 20 [2021-04-16 06:44:46,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 06:44:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-16 06:44:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-16 06:44:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 06:44:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-04-16 06:44:46,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-04-16 06:44:46,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 06:44:46,383 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-04-16 06:44:46,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-04-16 06:44:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 06:44:46,384 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 06:44:46,384 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 06:44:46,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 06:44:46,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 06:44:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 06:44:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-04-16 06:44:46,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 06:44:46,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267417627] [2021-04-16 06:44:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 06:44:46,392 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 06:44:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,439 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 06:44:46,456 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,456 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 06:44:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 06:44:46,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267417627] [2021-04-16 06:44:46,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 06:44:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 06:44:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657201974] [2021-04-16 06:44:46,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 06:44:46,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 06:44:46,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 06:44:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 06:44:46,519 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 06:44:46,635 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-04-16 06:44:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 06:44:46,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 06:44:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 06:44:46,638 INFO L225 Difference]: With dead ends: 33 [2021-04-16 06:44:46,638 INFO L226 Difference]: Without dead ends: 26 [2021-04-16 06:44:46,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-16 06:44:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-04-16 06:44:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-04-16 06:44:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 06:44:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-04-16 06:44:46,661 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-04-16 06:44:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 06:44:46,661 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-04-16 06:44:46,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-04-16 06:44:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 06:44:46,661 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 06:44:46,661 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 06:44:46,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 06:44:46,662 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 06:44:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 06:44:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-04-16 06:44:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 06:44:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684982037] [2021-04-16 06:44:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 06:44:46,667 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 06:44:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 06:44:46,721 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-04-16 06:44:46,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 06:44:46,729 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 06:44:46,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 06:44:46,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,738 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 06:44:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:46,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:46,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 06:44:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684982037] [2021-04-16 06:44:46,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 06:44:46,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 06:44:46,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734135744] [2021-04-16 06:44:46,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 06:44:46,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 06:44:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 06:44:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-04-16 06:44:46,784 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 06:44:47,021 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-04-16 06:44:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 06:44:47,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 06:44:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 06:44:47,022 INFO L225 Difference]: With dead ends: 30 [2021-04-16 06:44:47,022 INFO L226 Difference]: Without dead ends: 28 [2021-04-16 06:44:47,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-16 06:44:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-16 06:44:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-04-16 06:44:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-04-16 06:44:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-04-16 06:44:47,027 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-04-16 06:44:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 06:44:47,027 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-04-16 06:44:47,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 06:44:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-04-16 06:44:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-16 06:44:47,028 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 06:44:47,028 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 06:44:47,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 06:44:47,028 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 06:44:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 06:44:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-04-16 06:44:47,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 06:44:47,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748294419] [2021-04-16 06:44:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 06:44:47,031 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 06:44:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:47,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:47,070 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,071 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 06:44:47,077 INFO L142 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-04-16 06:44:47,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 06:44:47,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-16 06:44:47,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 06:44:47,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 06:44:47,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:47,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 06:44:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:47,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,152 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:47,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-04-16 06:44:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 06:44:47,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 06:44:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 06:44:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748294419] [2021-04-16 06:44:47,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 06:44:47,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-16 06:44:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134958860] [2021-04-16 06:44:47,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-16 06:44:47,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 06:44:47,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-16 06:44:47,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-16 06:44:47,165 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 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) [2021-04-16 06:44:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 06:44:47,396 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-04-16 06:44:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-16 06:44:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 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 [2021-04-16 06:44:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 06:44:47,399 INFO L225 Difference]: With dead ends: 38 [2021-04-16 06:44:47,399 INFO L226 Difference]: Without dead ends: 36 [2021-04-16 06:44:47,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-04-16 06:44:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-04-16 06:44:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-04-16 06:44:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-16 06:44:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-04-16 06:44:47,412 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-04-16 06:44:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 06:44:47,412 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-04-16 06:44:47,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 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) [2021-04-16 06:44:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-04-16 06:44:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-16 06:44:47,414 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 06:44:47,414 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 06:44:47,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 06:44:47,414 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 06:44:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 06:44:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-04-16 06:44:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 06:44:47,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521394915] [2021-04-16 06:44:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 06:44:47,466 INFO L142 QuantifierPusher]: treesize reduction 4, result has 90.7 percent of original size [2021-04-16 06:44:47,476 INFO L147 QuantifierPusher]: treesize reduction 4, result has 82.6 percent of original size 19 [2021-04-16 06:44:47,477 INFO L175 rdanLoopAcceleration]: Guard: Formula: (and (< v_main_~i~0_8 v_main_~n~0_6) (<= |v_main_#t~nondet9_4| 2147483647) (= (+ |v_main_#t~nondet9_4| v_main_~x~0_16) (+ v_main_~y~0_7 |v_main_#t~nondet9_4|)) (not (= |v_main_#t~nondet9_4| 0)) (<= 0 (+ |v_main_#t~nondet9_4| 2147483648))) InVars {main_~i~0=v_main_~i~0_8, main_~y~0=v_main_~y~0_7, main_~n~0=v_main_~n~0_6, main_~x~0=v_main_~x~0_16, main_#t~nondet9=|v_main_#t~nondet9_4|} OutVars{main_~i~0=v_main_~i~0_8, main_~y~0=v_main_~y~0_7, main_~n~0=v_main_~n~0_6, main_~x~0=v_main_~x~0_16, main_#t~nondet9=|v_main_#t~nondet9_4|} AuxVars[] AssignedVars[] [2021-04-16 06:44:47,495 WARN L240 tifierPushTermWalker]: treesize reduction 48, result has 72.1 percent of original size [2021-04-16 06:44:47,503 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,507 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,520 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,523 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,524 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-04-16 06:44:47,536 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 06:44:47,540 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,540 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-04-16 06:44:47,544 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,548 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,552 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,555 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-04-16 06:44:47,557 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-04-16 06:44:47,560 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,563 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,566 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,568 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,574 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,576 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,579 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,583 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,585 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,589 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,591 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,593 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,595 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,598 INFO L118 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,600 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,602 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,603 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,606 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,608 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,610 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,613 WARN L245 tifierPushTermWalker]: treesize reduction 48, result has 72.1 percent of original size 110 [2021-04-16 06:44:47,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 06:44:47,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-04-16 06:44:47,670 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-04-16 06:44:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 06:44:47,696 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 06:44:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 06:44:47,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 06:44:47,729 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-04-16 06:44:47,729 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 06:44:47,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-16 06:44:47,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 06:44:47 BoogieIcfgContainer [2021-04-16 06:44:47,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 06:44:47,737 INFO L168 Benchmark]: Toolchain (without parser) took 2268.44 ms. Allocated memory is still 194.0 MB. Free memory was 159.7 MB in the beginning and 164.8 MB in the end (delta: -5.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 06:44:47,738 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 194.0 MB. Free memory is still 176.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 06:44:47,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.45 ms. Allocated memory is still 194.0 MB. Free memory was 159.6 MB in the beginning and 150.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 06:44:47,738 INFO L168 Benchmark]: Boogie Preprocessor took 59.14 ms. Allocated memory is still 194.0 MB. Free memory was 150.0 MB in the beginning and 177.1 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2021-04-16 06:44:47,738 INFO L168 Benchmark]: RCFGBuilder took 255.82 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 162.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-16 06:44:47,739 INFO L168 Benchmark]: TraceAbstraction took 1761.90 ms. Allocated memory is still 194.0 MB. Free memory was 161.9 MB in the beginning and 164.8 MB in the end (delta: -3.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 06:44:47,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 194.0 MB. Free memory is still 176.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.45 ms. Allocated memory is still 194.0 MB. Free memory was 159.6 MB in the beginning and 150.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.14 ms. Allocated memory is still 194.0 MB. Free memory was 150.0 MB in the beginning and 177.1 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.82 ms. Allocated memory is still 194.0 MB. Free memory was 177.1 MB in the beginning and 162.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1761.90 ms. Allocated memory is still 194.0 MB. Free memory was 161.9 MB in the beginning and 164.8 MB in the end (delta: -3.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i