/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 [2021-02-19 17:58:47,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:58:47,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:58:47,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:58:47,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:58:47,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:58:47,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:58:47,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:58:47,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:58:47,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:58:47,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:58:47,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:58:47,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:58:47,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:58:47,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:58:47,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:58:47,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:58:47,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:58:47,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:58:47,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:58:47,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:58:47,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:58:47,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:58:47,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:58:47,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 17:58:47,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:58:47,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:58:47,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:58:47,958 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 [2021-02-19 17:58:48,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:58:48,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:58:48,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:58:48,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:58:48,019 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:58:48,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:58:48,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:58:48,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:58:48,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:58:48,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:58:48,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:58:48,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:58:48,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:58:48,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:58:48,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:58:48,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:58:48,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:58:48,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:58:48,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:58:48,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:58:48,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:58:48,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:58:48,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:58:48,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:58:48,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:58:48,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:58:48,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:58:48,511 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:58:48,512 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:58:48,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-19 17:58:48,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc85f362/9b163f0eae2d4941b943467d5ed7e73c/FLAG6a6d9936b [2021-02-19 17:58:49,146 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:58:49,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-19 17:58:49,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc85f362/9b163f0eae2d4941b943467d5ed7e73c/FLAG6a6d9936b [2021-02-19 17:58:49,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffc85f362/9b163f0eae2d4941b943467d5ed7e73c [2021-02-19 17:58:49,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:58:49,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:58:49,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:58:49,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:58:49,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:58:49,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f779b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49, skipping insertion in model container [2021-02-19 17:58:49,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:58:49,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:58:49,736 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] [2021-02-19 17:58:49,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:58:49,767 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:58:49,781 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] [2021-02-19 17:58:49,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:58:49,803 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:58:49,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49 WrapperNode [2021-02-19 17:58:49,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:58:49,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:58:49,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:58:49,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:58:49,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (1/1) ... [2021-02-19 17:58:49,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:58:49,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:58:49,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:58:49,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:58:49,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (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 [2021-02-19 17:58:49,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:58:49,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:58:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:58:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 17:58:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 17:58:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:58:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:58:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:58:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:58:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:58:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 17:58:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 17:58:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 17:58:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:58:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:58:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:58:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:58:49,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:58:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:58:49,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:58:50,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:58:50,322 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 17:58:50,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:58:50 BoogieIcfgContainer [2021-02-19 17:58:50,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:58:50,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:58:50,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:58:50,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:58:50,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:58:49" (1/3) ... [2021-02-19 17:58:50,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fddd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:58:50, skipping insertion in model container [2021-02-19 17:58:50,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:58:49" (2/3) ... [2021-02-19 17:58:50,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fddd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:58:50, skipping insertion in model container [2021-02-19 17:58:50,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:58:50" (3/3) ... [2021-02-19 17:58:50,334 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-19 17:58:50,342 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:58:50,347 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:58:50,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 17:58:50,406 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:58:50,406 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:58:50,406 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:58:50,406 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:58:50,406 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:58:50,438 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:58:50,438 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:58:50,438 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:58:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-19 17:58:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:58:50,472 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:50,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:58:50,473 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:50,481 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-02-19 17:58:50,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:50,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412938757] [2021-02-19 17:58:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:50,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:50,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:50,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:50,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:50,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:50,862 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:50,863 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:50,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412938757] [2021-02-19 17:58:50,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:50,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:58:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089075239] [2021-02-19 17:58:50,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:58:50,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:58:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:58:50,909 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-02-19 17:58:51,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:51,016 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-02-19 17:58:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:58:51,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-02-19 17:58:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:51,028 INFO L225 Difference]: With dead ends: 41 [2021-02-19 17:58:51,028 INFO L226 Difference]: Without dead ends: 20 [2021-02-19 17:58:51,033 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 [2021-02-19 17:58:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-19 17:58:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-19 17:58:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-19 17:58:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-19 17:58:51,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-02-19 17:58:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:51,075 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-19 17:58:51,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 17:58:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-19 17:58:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:58:51,076 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:51,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:58:51,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:58:51,077 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:51,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:51,078 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-02-19 17:58:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:51,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941376679] [2021-02-19 17:58:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:51,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:58:51,139 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:51,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,177 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941376679] [2021-02-19 17:58:51,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:51,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:58:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720108713] [2021-02-19 17:58:51,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:58:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:58:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:58:51,182 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2021-02-19 17:58:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:51,295 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-02-19 17:58:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:58:51,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-02-19 17:58:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:51,297 INFO L225 Difference]: With dead ends: 33 [2021-02-19 17:58:51,298 INFO L226 Difference]: Without dead ends: 26 [2021-02-19 17:58:51,299 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 [2021-02-19 17:58:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-19 17:58:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-02-19 17:58:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-02-19 17:58:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-02-19 17:58:51,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-02-19 17:58:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:51,310 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-02-19 17:58:51,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 17:58:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-02-19 17:58:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 17:58:51,311 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:51,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:58:51,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:58:51,312 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-02-19 17:58:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:51,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901466] [2021-02-19 17:58:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:51,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:58:51,444 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-19 17:58:51,449 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-19 17:58:51,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:58:51,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:58:51,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:51,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901466] [2021-02-19 17:58:51,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:51,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-19 17:58:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710346406] [2021-02-19 17:58:51,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:58:51,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:51,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:58:51,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:58:51,551 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-02-19 17:58:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:51,858 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-02-19 17:58:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:58:51,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-02-19 17:58:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:51,862 INFO L225 Difference]: With dead ends: 30 [2021-02-19 17:58:51,862 INFO L226 Difference]: Without dead ends: 28 [2021-02-19 17:58:51,866 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 [2021-02-19 17:58:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-19 17:58:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-19 17:58:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-19 17:58:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-02-19 17:58:51,888 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-02-19 17:58:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:51,889 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-02-19 17:58:51,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-19 17:58:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-02-19 17:58:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:58:51,896 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:51,896 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:58:51,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:58:51,897 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-02-19 17:58:51,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:51,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226390584] [2021-02-19 17:58:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:51,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,968 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:51,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 17:58:51,978 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-19 17:58:51,979 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-19 17:58:51,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 17:58:51,998 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:51,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:58:52,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:52,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 17:58:52,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:52,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:52,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:58:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:52,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:52,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:52,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-19 17:58:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:58:52,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:58:52,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:58:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:58:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226390584] [2021-02-19 17:58:52,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:58:52,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 17:58:52,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30362554] [2021-02-19 17:58:52,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:58:52,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:58:52,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:58:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:58:52,066 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2021-02-19 17:58:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:58:52,362 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-02-19 17:58:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:58:52,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-02-19 17:58:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:58:52,364 INFO L225 Difference]: With dead ends: 38 [2021-02-19 17:58:52,364 INFO L226 Difference]: Without dead ends: 36 [2021-02-19 17:58:52,365 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 [2021-02-19 17:58:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-19 17:58:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-02-19 17:58:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-19 17:58:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-19 17:58:52,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-02-19 17:58:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:58:52,375 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-19 17:58:52,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-19 17:58:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-19 17:58:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 17:58:52,377 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:58:52,377 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] [2021-02-19 17:58:52,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:58:52,377 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:58:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:58:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-02-19 17:58:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:58:52,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583271666] [2021-02-19 17:58:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:58:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:58:52,394 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:58:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-19 17:58:52,421 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-19 17:58:52,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-19 17:58:52,461 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-19 17:58:52,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:58:52,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:58:52 BoogieIcfgContainer [2021-02-19 17:58:52,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:58:52,530 INFO L168 Benchmark]: Toolchain (without parser) took 2980.20 ms. Allocated memory was 176.2 MB in the beginning and 222.3 MB in the end (delta: 46.1 MB). Free memory was 151.5 MB in the beginning and 126.5 MB in the end (delta: 25.0 MB). Peak memory consumption was 72.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:52,530 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 176.2 MB. Free memory is still 147.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:58:52,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.74 ms. Allocated memory is still 176.2 MB. Free memory was 150.4 MB in the beginning and 140.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:52,532 INFO L168 Benchmark]: Boogie Preprocessor took 38.19 ms. Allocated memory is still 176.2 MB. Free memory was 140.8 MB in the beginning and 139.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:52,533 INFO L168 Benchmark]: RCFGBuilder took 480.51 ms. Allocated memory is still 176.2 MB. Free memory was 139.3 MB in the beginning and 125.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:52,533 INFO L168 Benchmark]: TraceAbstraction took 2201.70 ms. Allocated memory was 176.2 MB in the beginning and 222.3 MB in the end (delta: 46.1 MB). Free memory was 124.8 MB in the beginning and 126.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 45.8 MB. Max. memory is 8.0 GB. [2021-02-19 17:58:52,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 176.2 MB. Free memory is still 147.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.74 ms. Allocated memory is still 176.2 MB. Free memory was 150.4 MB in the beginning and 140.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.19 ms. Allocated memory is still 176.2 MB. Free memory was 140.8 MB in the beginning and 139.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 480.51 ms. Allocated memory is still 176.2 MB. Free memory was 139.3 MB in the beginning and 125.2 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2201.70 ms. Allocated memory was 176.2 MB in the beginning and 222.3 MB in the end (delta: 46.1 MB). Free memory was 124.8 MB in the beginning and 126.5 MB in the end (delta: -1.7 MB). Peak memory consumption was 45.8 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