/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:25:51,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:25:51,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:25:51,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:25:51,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:25:51,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:25:51,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:25:51,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:25:51,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:25:51,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:25:51,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:25:51,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:25:51,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:25:51,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:25:51,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:25:51,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:25:51,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:25:51,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:25:51,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:25:51,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:25:51,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:25:51,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:25:51,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:25:51,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:25:51,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:25:51,509 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:25:51,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:25:51,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:25:51,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:25:51,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:25:51,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:25:51,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:25:51,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:25:51,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:25:51,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:25:51,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:25:51,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:25:51,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:25:51,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:25:51,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:25:51,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:25:51,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:25:51,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:25:51,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:25:51,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:25:51,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:25:51,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:25:51,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:25:51,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:25:51,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:25:51,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:25:52,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:25:52,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:25:52,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:25:52,049 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:25:52,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-21 16:25:52,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b40193ff/d8e6ccff65bf4532b0468dbedd7d89b9/FLAG4d090183f [2021-02-21 16:25:52,732 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:25:52,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-21 16:25:52,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b40193ff/d8e6ccff65bf4532b0468dbedd7d89b9/FLAG4d090183f [2021-02-21 16:25:53,115 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b40193ff/d8e6ccff65bf4532b0468dbedd7d89b9 [2021-02-21 16:25:53,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:25:53,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:25:53,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:25:53,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:25:53,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:25:53,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5685db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53, skipping insertion in model container [2021-02-21 16:25:53,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:25:53,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:25:53,343 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] [2021-02-21 16:25:53,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:25:53,371 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:25:53,390 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] [2021-02-21 16:25:53,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:25:53,427 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:25:53,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53 WrapperNode [2021-02-21 16:25:53,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:25:53,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:25:53,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:25:53,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:25:53,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (1/1) ... [2021-02-21 16:25:53,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:25:53,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:25:53,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:25:53,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:25:53,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (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 [2021-02-21 16:25:53,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:25:53,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:25:53,661 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:25:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:25:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 16:25:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:25:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:25:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:25:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:25:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:25:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:25:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 16:25:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:25:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:25:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:25:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:25:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:25:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:25:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:25:53,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:25:54,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:25:54,160 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:25:54,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:25:54 BoogieIcfgContainer [2021-02-21 16:25:54,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:25:54,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:25:54,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:25:54,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:25:54,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:25:53" (1/3) ... [2021-02-21 16:25:54,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400f5f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:25:54, skipping insertion in model container [2021-02-21 16:25:54,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:25:53" (2/3) ... [2021-02-21 16:25:54,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400f5f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:25:54, skipping insertion in model container [2021-02-21 16:25:54,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:25:54" (3/3) ... [2021-02-21 16:25:54,190 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-21 16:25:54,205 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:25:54,216 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:25:54,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:25:54,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:25:54,300 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:25:54,300 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:25:54,300 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:25:54,300 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:25:54,300 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:25:54,301 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:25:54,301 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:25:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-21 16:25:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-21 16:25:54,337 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:54,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:25:54,338 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:54,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-02-21 16:25:54,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:54,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428849644] [2021-02-21 16:25:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:54,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:54,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:54,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:54,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:54,762 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-21 16:25:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:54,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:54,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428849644] [2021-02-21 16:25:54,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:54,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:25:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459615325] [2021-02-21 16:25:54,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:25:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:54,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:25:54,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:25:54,860 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-02-21 16:25:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:54,982 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-02-21 16:25:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:25:54,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-02-21 16:25:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:54,993 INFO L225 Difference]: With dead ends: 41 [2021-02-21 16:25:54,994 INFO L226 Difference]: Without dead ends: 20 [2021-02-21 16:25:54,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:25:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-21 16:25:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-21 16:25:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-21 16:25:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-21 16:25:55,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-02-21 16:25:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:55,044 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-21 16:25:55,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:25:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-21 16:25:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-21 16:25:55,046 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:55,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:25:55,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:25:55,047 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:55,048 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-02-21 16:25:55,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:55,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223055472] [2021-02-21 16:25:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:55,097 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:25:55,113 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:55,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:55,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223055472] [2021-02-21 16:25:55,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:55,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:25:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990061414] [2021-02-21 16:25:55,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:25:55,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:55,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:25:55,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:25:55,160 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2021-02-21 16:25:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:55,391 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-02-21 16:25:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:25:55,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-02-21 16:25:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:55,394 INFO L225 Difference]: With dead ends: 33 [2021-02-21 16:25:55,394 INFO L226 Difference]: Without dead ends: 26 [2021-02-21 16:25:55,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:25:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-21 16:25:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-02-21 16:25:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-02-21 16:25:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-02-21 16:25:55,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-02-21 16:25:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:55,421 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-02-21 16:25:55,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:25:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-02-21 16:25:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-21 16:25:55,422 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:55,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:25:55,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:25:55,422 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-02-21 16:25:55,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:55,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667427629] [2021-02-21 16:25:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:55,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,490 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:25:55,501 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-21 16:25:55,504 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-21 16:25:55,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:25:55,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,519 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:25:55,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:55,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:55,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:55,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667427629] [2021-02-21 16:25:55,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:55,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:25:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806058015] [2021-02-21 16:25:55,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:25:55,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:25:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:25:55,574 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-02-21 16:25:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:55,941 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-02-21 16:25:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:25:55,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-02-21 16:25:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:55,943 INFO L225 Difference]: With dead ends: 30 [2021-02-21 16:25:55,943 INFO L226 Difference]: Without dead ends: 28 [2021-02-21 16:25:55,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-21 16:25:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-21 16:25:55,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-21 16:25:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-21 16:25:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-02-21 16:25:55,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-02-21 16:25:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:55,956 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-02-21 16:25:55,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:25:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-02-21 16:25:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:25:55,958 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:55,958 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:25:55,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:25:55,958 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:55,959 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-02-21 16:25:55,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:55,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618767258] [2021-02-21 16:25:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:56,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:56,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:25:56,031 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-21 16:25:56,033 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-21 16:25:56,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:25:56,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:25:56,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:25:56,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,069 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:56,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:25:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:56,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:56,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-21 16:25:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:25:56,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:25:56,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:25:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:25:56,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618767258] [2021-02-21 16:25:56,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:25:56,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 16:25:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774634454] [2021-02-21 16:25:56,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 16:25:56,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:25:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 16:25:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:25:56,125 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2021-02-21 16:25:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:25:56,410 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-02-21 16:25:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:25:56,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-02-21 16:25:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:25:56,412 INFO L225 Difference]: With dead ends: 38 [2021-02-21 16:25:56,413 INFO L226 Difference]: Without dead ends: 36 [2021-02-21 16:25:56,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-02-21 16:25:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-21 16:25:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-02-21 16:25:56,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-21 16:25:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-21 16:25:56,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-02-21 16:25:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:25:56,425 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-21 16:25:56,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 16:25:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-21 16:25:56,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:25:56,427 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:25:56,427 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] [2021-02-21 16:25:56,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:25:56,427 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:25:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:25:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-02-21 16:25:56,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:25:56,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212068547] [2021-02-21 16:25:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:25:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:25:56,453 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:25:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:25:56,474 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:25:56,528 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:25:56,528 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:25:56,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:25:56,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:25:56 BoogieIcfgContainer [2021-02-21 16:25:56,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:25:56,607 INFO L168 Benchmark]: Toolchain (without parser) took 3481.22 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 134.2 MB in the beginning and 86.0 MB in the end (delta: 48.2 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:56,607 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 159.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:25:56,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.93 ms. Allocated memory is still 159.4 MB. Free memory was 133.2 MB in the beginning and 123.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:56,611 INFO L168 Benchmark]: Boogie Preprocessor took 82.24 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:56,615 INFO L168 Benchmark]: RCFGBuilder took 645.87 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 108.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:56,619 INFO L168 Benchmark]: TraceAbstraction took 2431.96 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 107.6 MB in the beginning and 86.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 55.3 MB. Max. memory is 8.0 GB. [2021-02-21 16:25:56,624 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 159.4 MB. Free memory is still 131.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 298.93 ms. Allocated memory is still 159.4 MB. Free memory was 133.2 MB in the beginning and 123.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.24 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 122.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 645.87 ms. Allocated memory is still 159.4 MB. Free memory was 122.1 MB in the beginning and 108.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2431.96 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 107.6 MB in the beginning and 86.0 MB in the end (delta: 21.7 MB). Peak memory consumption was 55.3 MB. 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 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i