/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-36cd7be [2021-02-23 13:52:23,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:52:23,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:52:23,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:52:23,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:52:23,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:52:23,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:52:23,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:52:23,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:52:23,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:52:23,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:52:23,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:52:23,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:52:23,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:52:23,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:52:23,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:52:23,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:52:23,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:52:23,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:52:23,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:52:23,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:52:23,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:52:23,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:52:23,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:52:23,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:52:23,606 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:52:23,607 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:52:23,608 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:52:23,609 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 [2021-02-23 13:52:23,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:52:23,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:52:23,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:52:23,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:52:23,665 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:52:23,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:52:23,665 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:52:23,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:52:23,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:52:23,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:52:23,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:52:23,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:52:23,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:52:23,667 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:52:23,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:52:23,668 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:52:23,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:52:23,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:52:23,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:52:23,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:52:23,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:52:23,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:52:23,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:52:23,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:52:23,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:52:23,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:52:23,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:52:23,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:52:23,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:52:24,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:52:24,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:52:24,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:52:24,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:52:24,109 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:52:24,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-23 13:52:24,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab84b9f4d/6f791690927a4954b8352ae1e48dc485/FLAG07b6c5b77 [2021-02-23 13:52:24,725 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:52:24,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-23 13:52:24,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab84b9f4d/6f791690927a4954b8352ae1e48dc485/FLAG07b6c5b77 [2021-02-23 13:52:25,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab84b9f4d/6f791690927a4954b8352ae1e48dc485 [2021-02-23 13:52:25,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:52:25,134 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:52:25,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:25,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:52:25,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:52:25,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2886d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25, skipping insertion in model container [2021-02-23 13:52:25,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:52:25,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:52:25,316 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] [2021-02-23 13:52:25,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:25,351 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:52:25,362 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] [2021-02-23 13:52:25,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:52:25,382 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:52:25,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25 WrapperNode [2021-02-23 13:52:25,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:52:25,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:52:25,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:52:25,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:52:25,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (1/1) ... [2021-02-23 13:52:25,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:52:25,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:52:25,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:52:25,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:52:25,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (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 [2021-02-23 13:52:25,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:52:25,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:52:25,535 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:52:25,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 13:52:25,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 13:52:25,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:52:25,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:52:25,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:52:25,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:52:25,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:52:25,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 13:52:25,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 13:52:25,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:52:25,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:52:25,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:52:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:52:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:52:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:52:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:52:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:52:25,976 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:52:25,977 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:52:25,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:25 BoogieIcfgContainer [2021-02-23 13:52:25,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:52:25,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:52:25,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:52:25,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:52:25,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:52:25" (1/3) ... [2021-02-23 13:52:25,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf16546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:25, skipping insertion in model container [2021-02-23 13:52:25,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:52:25" (2/3) ... [2021-02-23 13:52:25,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf16546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:52:25, skipping insertion in model container [2021-02-23 13:52:25,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:52:25" (3/3) ... [2021-02-23 13:52:25,999 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-23 13:52:26,023 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:52:26,052 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:52:26,074 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:52:26,103 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:52:26,103 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:52:26,104 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:52:26,104 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:52:26,104 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:52:26,104 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:52:26,104 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:52:26,104 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:52:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-23 13:52:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 13:52:26,127 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:26,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:26,128 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2021-02-23 13:52:26,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:26,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206276057] [2021-02-23 13:52:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:26,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,330 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,331 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:26,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:52:26,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206276057] [2021-02-23 13:52:26,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:26,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:52:26,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581988185] [2021-02-23 13:52:26,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:52:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:26,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:52:26,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:52:26,537 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2021-02-23 13:52:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:26,679 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-02-23 13:52:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:52:26,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-02-23 13:52:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:26,693 INFO L225 Difference]: With dead ends: 41 [2021-02-23 13:52:26,693 INFO L226 Difference]: Without dead ends: 20 [2021-02-23 13:52:26,697 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 [2021-02-23 13:52:26,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-23 13:52:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-23 13:52:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-23 13:52:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-23 13:52:26,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-02-23 13:52:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:26,758 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-23 13:52:26,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:52:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-23 13:52:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 13:52:26,760 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:26,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:26,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:52:26,760 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2021-02-23 13:52:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:26,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204468188] [2021-02-23 13:52:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:26,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,824 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:52:26,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:26,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:26,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:52:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204468188] [2021-02-23 13:52:26,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:26,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:52:26,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438411396] [2021-02-23 13:52:26,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:52:26,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:26,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:52:26,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:52:26,895 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2021-02-23 13:52:27,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:27,041 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-02-23 13:52:27,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:52:27,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-02-23 13:52:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:27,043 INFO L225 Difference]: With dead ends: 33 [2021-02-23 13:52:27,043 INFO L226 Difference]: Without dead ends: 26 [2021-02-23 13:52:27,044 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 [2021-02-23 13:52:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-02-23 13:52:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-02-23 13:52:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-02-23 13:52:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-02-23 13:52:27,056 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-02-23 13:52:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:27,057 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-02-23 13:52:27,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:52:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-02-23 13:52:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-23 13:52:27,058 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:27,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:27,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:52:27,059 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2021-02-23 13:52:27,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:27,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394968836] [2021-02-23 13:52:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,124 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:52:27,137 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-23 13:52:27,138 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-23 13:52:27,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,148 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,210 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,211 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:52:27,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394968836] [2021-02-23 13:52:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 13:52:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862282369] [2021-02-23 13:52:27,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 13:52:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 13:52:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:52:27,215 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-02-23 13:52:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:27,533 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-02-23 13:52:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-23 13:52:27,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-02-23 13:52:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:27,535 INFO L225 Difference]: With dead ends: 30 [2021-02-23 13:52:27,536 INFO L226 Difference]: Without dead ends: 28 [2021-02-23 13:52:27,536 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 [2021-02-23 13:52:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-23 13:52:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-02-23 13:52:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-02-23 13:52:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-02-23 13:52:27,546 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-02-23 13:52:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:27,547 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-02-23 13:52:27,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 13:52:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-02-23 13:52:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:52:27,548 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:27,548 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:52:27,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:52:27,548 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2021-02-23 13:52:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:27,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127207687] [2021-02-23 13:52:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:52:27,617 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-23 13:52:27,618 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-23 13:52:27,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 13:52:27,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:52:27,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:52:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-23 13:52:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:52:27,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:52:27,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:52:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:52:27,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127207687] [2021-02-23 13:52:27,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:52:27,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 13:52:27,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49497864] [2021-02-23 13:52:27,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 13:52:27,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:52:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 13:52:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:52:27,708 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2021-02-23 13:52:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:52:28,020 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-02-23 13:52:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:52:28,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-02-23 13:52:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:52:28,026 INFO L225 Difference]: With dead ends: 38 [2021-02-23 13:52:28,026 INFO L226 Difference]: Without dead ends: 36 [2021-02-23 13:52:28,028 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 [2021-02-23 13:52:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-23 13:52:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-02-23 13:52:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-23 13:52:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-02-23 13:52:28,051 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2021-02-23 13:52:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:52:28,051 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-02-23 13:52:28,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 13:52:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-02-23 13:52:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:52:28,054 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:52:28,054 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] [2021-02-23 13:52:28,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:52:28,055 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:52:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:52:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2021-02-23 13:52:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:52:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733166781] [2021-02-23 13:52:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:52:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:52:28,110 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:52:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:52:28,151 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:52:28,192 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:52:28,193 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:52:28,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:52:28,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:52:28 BoogieIcfgContainer [2021-02-23 13:52:28,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:52:28,247 INFO L168 Benchmark]: Toolchain (without parser) took 3130.87 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 125.0 MB in the beginning and 68.2 MB in the end (delta: 56.9 MB). Peak memory consumption was 87.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:28,248 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:52:28,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 114.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:28,249 INFO L168 Benchmark]: Boogie Preprocessor took 36.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:28,250 INFO L168 Benchmark]: RCFGBuilder took 558.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 98.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:28,251 INFO L168 Benchmark]: TraceAbstraction took 2262.65 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 98.4 MB in the beginning and 68.2 MB in the end (delta: 30.3 MB). Peak memory consumption was 61.3 MB. Max. memory is 8.0 GB. [2021-02-23 13:52:28,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.48 ms. Allocated memory is still 151.0 MB. Free memory was 124.0 MB in the beginning and 114.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.14 ms. Allocated memory is still 151.0 MB. Free memory was 114.5 MB in the beginning and 113.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 558.14 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 98.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2262.65 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 98.4 MB in the beginning and 68.2 MB in the end (delta: 30.3 MB). Peak memory consumption was 61.3 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