/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:44,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:44,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:44,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:20:44,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:44,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:44,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:44,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:44,259 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:44,260 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:44,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:44,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:44,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:44,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:44,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:44,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:44,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:20:44,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:44,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:44,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:44,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:44,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:44,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:44,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:44,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:44,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:44,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:44,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:44,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:44,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:44,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:44,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:44,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:44,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:44,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:44,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:44,321 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:44,321 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:44,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:44,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:44,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:44,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:44,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:44,322 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:44,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:44,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:44,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:44,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:44,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:44,738 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:44,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-22 02:20:44,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cc48ea9/f742f2b8e16641149c90587b34bc23fb/FLAG053e31b00 [2021-02-22 02:20:45,499 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:45,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-22 02:20:45,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cc48ea9/f742f2b8e16641149c90587b34bc23fb/FLAG053e31b00 [2021-02-22 02:20:45,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42cc48ea9/f742f2b8e16641149c90587b34bc23fb [2021-02-22 02:20:45,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:45,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:45,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:45,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:45,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:45,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:45" (1/1) ... [2021-02-22 02:20:45,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1dd3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:45, skipping insertion in model container [2021-02-22 02:20:45,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:45" (1/1) ... [2021-02-22 02:20:45,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:45,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:46,081 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] [2021-02-22 02:20:46,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:46,106 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:46,121 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] [2021-02-22 02:20:46,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:46,144 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:46,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46 WrapperNode [2021-02-22 02:20:46,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:46,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:46,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:46,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:46,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (1/1) ... [2021-02-22 02:20:46,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:46,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:46,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:46,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:46,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (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 [2021-02-22 02:20:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:46,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:46,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:46,312 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:20:46,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:46,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:46,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:46,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:46,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:46,315 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:20:46,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:46,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:20:46,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:46,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:46,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:46,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:46,766 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:20:46,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:46 BoogieIcfgContainer [2021-02-22 02:20:46,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:46,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:46,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:46,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:46,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:45" (1/3) ... [2021-02-22 02:20:46,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@832e8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:46, skipping insertion in model container [2021-02-22 02:20:46,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:46" (2/3) ... [2021-02-22 02:20:46,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@832e8fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:46, skipping insertion in model container [2021-02-22 02:20:46,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:46" (3/3) ... [2021-02-22 02:20:46,779 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-22 02:20:46,788 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:46,794 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:20:46,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:20:46,860 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:20:46,860 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:20:46,860 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:20:46,860 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:20:46,861 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:20:46,861 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:20:46,861 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:20:46,861 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:20:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-22 02:20:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:20:46,889 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:46,890 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:20:46,891 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -478128650, now seen corresponding path program 1 times [2021-02-22 02:20:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:46,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814030749] [2021-02-22 02:20:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:46,994 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:47,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:47,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814030749] [2021-02-22 02:20:47,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:47,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:20:47,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806182583] [2021-02-22 02:20:47,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:20:47,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:20:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:47,399 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2021-02-22 02:20:47,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:47,585 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-02-22 02:20:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:20:47,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-22 02:20:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:47,597 INFO L225 Difference]: With dead ends: 70 [2021-02-22 02:20:47,598 INFO L226 Difference]: Without dead ends: 39 [2021-02-22 02:20:47,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:20:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-22 02:20:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-22 02:20:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-22 02:20:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-22 02:20:47,653 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2021-02-22 02:20:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:47,654 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-22 02:20:47,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:20:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-22 02:20:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-22 02:20:47,655 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:47,655 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:20:47,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:20:47,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash -496599070, now seen corresponding path program 1 times [2021-02-22 02:20:47,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:47,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300218587] [2021-02-22 02:20:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:47,661 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:47,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,727 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:47,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:47,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,763 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:47,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:47,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:47,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300218587] [2021-02-22 02:20:47,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:47,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:20:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697067418] [2021-02-22 02:20:47,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:20:47,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:47,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:20:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:20:47,818 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2021-02-22 02:20:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:48,049 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-22 02:20:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 02:20:48,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-02-22 02:20:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:48,051 INFO L225 Difference]: With dead ends: 57 [2021-02-22 02:20:48,052 INFO L226 Difference]: Without dead ends: 50 [2021-02-22 02:20:48,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:20:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-22 02:20:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-02-22 02:20:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-22 02:20:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-22 02:20:48,072 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2021-02-22 02:20:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:48,072 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-22 02:20:48,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:20:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-22 02:20:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 02:20:48,074 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:48,074 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-22 02:20:48,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:20:48,075 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:48,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1797658403, now seen corresponding path program 1 times [2021-02-22 02:20:48,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655932015] [2021-02-22 02:20:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:48,083 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:48,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:48,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:48,187 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:48,203 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-22 02:20:48,204 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-22 02:20:48,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:48,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:48,224 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,225 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:48,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:48,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655932015] [2021-02-22 02:20:48,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:48,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 02:20:48,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876236102] [2021-02-22 02:20:48,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 02:20:48,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:48,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 02:20:48,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:20:48,286 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 7 states. [2021-02-22 02:20:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:48,792 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-22 02:20:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 02:20:48,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-22 02:20:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:48,795 INFO L225 Difference]: With dead ends: 53 [2021-02-22 02:20:48,795 INFO L226 Difference]: Without dead ends: 51 [2021-02-22 02:20:48,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-22 02:20:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-22 02:20:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-02-22 02:20:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-22 02:20:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-22 02:20:48,837 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2021-02-22 02:20:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:48,841 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-22 02:20:48,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 02:20:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-22 02:20:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:20:48,843 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:48,843 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:48,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:20:48,844 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:48,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1418508499, now seen corresponding path program 1 times [2021-02-22 02:20:48,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:48,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131747621] [2021-02-22 02:20:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:48,853 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:20:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:48,930 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,930 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:48,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:20:48,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:20:48,948 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-22 02:20:48,949 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-22 02:20:48,956 WARN L141 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size [2021-02-22 02:20:48,957 WARN L147 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size 27 [2021-02-22 02:20:48,991 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:48,992 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:20:49,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:49,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:20:49,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:20:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:49,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-22 02:20:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:20:49,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:20:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:20:49,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131747621] [2021-02-22 02:20:49,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:20:49,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-22 02:20:49,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325513606] [2021-02-22 02:20:49,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-22 02:20:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:20:49,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-22 02:20:49,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-22 02:20:49,081 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2021-02-22 02:20:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:20:49,548 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-22 02:20:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-22 02:20:49,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-22 02:20:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:20:49,554 INFO L225 Difference]: With dead ends: 64 [2021-02-22 02:20:49,554 INFO L226 Difference]: Without dead ends: 62 [2021-02-22 02:20:49,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-22 02:20:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-22 02:20:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-02-22 02:20:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:20:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-02-22 02:20:49,596 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 36 [2021-02-22 02:20:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:20:49,597 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-02-22 02:20:49,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-22 02:20:49,598 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-02-22 02:20:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-22 02:20:49,603 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:20:49,603 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:20:49,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:20:49,604 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:20:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:20:49,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1153665475, now seen corresponding path program 1 times [2021-02-22 02:20:49,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:20:49,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658612249] [2021-02-22 02:20:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:20:49,655 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,675 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,683 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,686 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,717 WARN L141 QuantifierPusher]: treesize reduction 22, result has 26.7 percent of original size [2021-02-22 02:20:49,729 WARN L147 QuantifierPusher]: treesize reduction 22, result has 26.7 percent of original size 8 [2021-02-22 02:20:49,734 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,738 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,741 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,746 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,749 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,752 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,757 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-22 02:20:49,760 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-22 02:20:49,763 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,770 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,772 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,775 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,778 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,782 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,787 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-22 02:20:49,789 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-22 02:20:49,792 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,795 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,797 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,800 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,803 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-22 02:20:49,806 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-22 02:20:49,831 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size [2021-02-22 02:20:49,836 INFO L723 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2021-02-22 02:20:49,842 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:20:49,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:20:49,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-22 02:20:49,853 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size 26 [2021-02-22 02:20:49,859 WARN L141 QuantifierPusher]: treesize reduction 10, result has 88.1 percent of original size [2021-02-22 02:20:49,863 WARN L147 QuantifierPusher]: treesize reduction 10, result has 88.1 percent of original size 74 [2021-02-22 02:20:49,864 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:20:49,879 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:20:49,880 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:20:49,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-22 02:20:49,901 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:20:49,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:20:49 BoogieIcfgContainer [2021-02-22 02:20:49,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:20:49,904 INFO L168 Benchmark]: Toolchain (without parser) took 4027.80 ms. Allocated memory was 156.2 MB in the beginning and 196.1 MB in the end (delta: 39.8 MB). Free memory was 132.2 MB in the beginning and 122.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 50.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:49,904 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory was 130.8 MB in the beginning and 130.7 MB in the end (delta: 130.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:20:49,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.33 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:49,906 INFO L168 Benchmark]: Boogie Preprocessor took 39.68 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 119.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:49,906 INFO L168 Benchmark]: RCFGBuilder took 581.73 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 104.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:49,907 INFO L168 Benchmark]: TraceAbstraction took 3131.59 ms. Allocated memory was 156.2 MB in the beginning and 196.1 MB in the end (delta: 39.8 MB). Free memory was 103.8 MB in the beginning and 122.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:20:49,911 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory was 130.8 MB in the beginning and 130.7 MB in the end (delta: 130.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.33 ms. Allocated memory is still 156.2 MB. Free memory was 131.2 MB in the beginning and 121.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.68 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 119.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 581.73 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 104.3 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3131.59 ms. Allocated memory was 156.2 MB in the beginning and 196.1 MB in the end (delta: 39.8 MB). Free memory was 103.8 MB in the beginning and 122.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible 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