/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/loop-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:44,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:44,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:44,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:44,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:44,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:44,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:44,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:44,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:44,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:44,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:44,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:44,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:44,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:44,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:44,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:44,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:44,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:44,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:44,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:44,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:44,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:44,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:44,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:44,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:44,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:44,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:44,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:44,993 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 [2020-11-06 22:45:45,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:45,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:45,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:45,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:45,073 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:45,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:45,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:45,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:45,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:45,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:45,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:45,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:45,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:45,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:45,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:45,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:45,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:45,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:45,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:45,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:45,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:45,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:45,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:45,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:45,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:45,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:45,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:45,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:45,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:45,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:45,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:45,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:45,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:45,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:45,592 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:45,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-11-06 22:45:45,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57960abb/71e0548747ea4571a3db887ac62aa0e2/FLAG5fb2b2ab6 [2020-11-06 22:45:46,432 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:46,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-11-06 22:45:46,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57960abb/71e0548747ea4571a3db887ac62aa0e2/FLAG5fb2b2ab6 [2020-11-06 22:45:46,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57960abb/71e0548747ea4571a3db887ac62aa0e2 [2020-11-06 22:45:46,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:46,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:46,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:46,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:46,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:46,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:46" (1/1) ... [2020-11-06 22:45:46,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@268778b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:46, skipping insertion in model container [2020-11-06 22:45:46,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:46" (1/1) ... [2020-11-06 22:45:46,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:46,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:47,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:47,123 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:47,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:47,166 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:47,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47 WrapperNode [2020-11-06 22:45:47,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:47,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:47,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:47,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:47,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (1/1) ... [2020-11-06 22:45:47,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:47,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:47,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:47,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:47,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (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 [2020-11-06 22:45:47,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:47,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:47,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:47,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:47,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-11-06 22:45:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:47,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:47,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:47,651 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:47,651 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:47,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:47 BoogieIcfgContainer [2020-11-06 22:45:47,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:47,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:47,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:47,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:47,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:46" (1/3) ... [2020-11-06 22:45:47,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222e326a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:47, skipping insertion in model container [2020-11-06 22:45:47,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:47" (2/3) ... [2020-11-06 22:45:47,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222e326a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:47, skipping insertion in model container [2020-11-06 22:45:47,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:47" (3/3) ... [2020-11-06 22:45:47,668 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-11-06 22:45:47,691 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:47,695 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:47,712 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:47,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:47,749 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:47,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:47,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:47,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:47,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:47,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:47,751 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:47,794 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-06 22:45:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:47,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:47,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:47,807 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash 671356177, now seen corresponding path program 1 times [2020-11-06 22:45:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:47,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545530654] [2020-11-06 22:45:47,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:48,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545530654] [2020-11-06 22:45:48,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:48,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:45:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905076907] [2020-11-06 22:45:48,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:48,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:48,423 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-11-06 22:45:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:48,938 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-11-06 22:45:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:45:48,940 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-06 22:45:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:48,949 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:45:48,949 INFO L226 Difference]: Without dead ends: 14 [2020-11-06 22:45:48,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-06 22:45:49,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-06 22:45:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-06 22:45:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-06 22:45:49,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-06 22:45:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:49,017 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-06 22:45:49,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-06 22:45:49,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:49,018 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:49,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:49,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:49,019 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:49,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:49,020 INFO L82 PathProgramCache]: Analyzing trace with hash 435169889, now seen corresponding path program 1 times [2020-11-06 22:45:49,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:49,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131104716] [2020-11-06 22:45:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:49,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:49,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131104716] [2020-11-06 22:45:49,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326053315] [2020-11-06 22:45:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:49,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:49,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-11-06 22:45:49,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603613367] [2020-11-06 22:45:49,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:45:49,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:49,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:45:49,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:49,368 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-11-06 22:45:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:49,614 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-06 22:45:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:49,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-06 22:45:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:49,615 INFO L225 Difference]: With dead ends: 16 [2020-11-06 22:45:49,615 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:45:49,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:45:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:45:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:45:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:45:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:45:49,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-11-06 22:45:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:49,618 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:45:49,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:45:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:45:49,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:45:49,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:45:49,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:45:50,179 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-11-06 22:45:50,179 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-06 22:45:50,179 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-11-06 22:45:50,180 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-06 22:45:50,180 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:50,180 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:45:50,180 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:50,181 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:45:50,181 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:45:50,181 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:45:50,181 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:45:50,181 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-11-06 22:45:50,182 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-11-06 22:45:50,182 INFO L262 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2020-11-06 22:45:50,183 INFO L262 CegarLoopResult]: At program point L17-3(lines 17 19) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 2))) (and (< 0 .cse0) (<= main_~x~0 (* 2 .cse0)))) (= main_~x~0 0)) [2020-11-06 22:45:50,183 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-11-06 22:45:50,183 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-11-06 22:45:50,183 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-11-06 22:45:50,183 INFO L262 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:45:50,183 INFO L266 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-11-06 22:45:50,184 INFO L266 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-11-06 22:45:50,184 INFO L266 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-11-06 22:45:50,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:50 BoogieIcfgContainer [2020-11-06 22:45:50,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:50,203 INFO L168 Benchmark]: Toolchain (without parser) took 3411.68 ms. Allocated memory is still 155.2 MB. Free memory was 131.0 MB in the beginning and 127.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 79.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:50,204 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 155.2 MB. Free memory is still 127.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:50,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.90 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 121.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:50,206 INFO L168 Benchmark]: Boogie Preprocessor took 73.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:50,207 INFO L168 Benchmark]: RCFGBuilder took 408.74 ms. Allocated memory is still 155.2 MB. Free memory was 119.9 MB in the beginning and 106.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:50,208 INFO L168 Benchmark]: TraceAbstraction took 2543.29 ms. Allocated memory is still 155.2 MB. Free memory was 106.4 MB in the beginning and 127.3 MB in the end (delta: -20.9 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:50,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 155.2 MB. Free memory is still 127.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 370.90 ms. Allocated memory is still 155.2 MB. Free memory was 130.4 MB in the beginning and 121.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.94 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 408.74 ms. Allocated memory is still 155.2 MB. Free memory was 119.9 MB in the beginning and 106.8 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2543.29 ms. Allocated memory is still 155.2 MB. Free memory was 106.4 MB in the beginning and 127.3 MB in the end (delta: -20.9 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 26 SDslu, 51 SDs, 0 SdLazy, 73 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 16 PreInvPairs, 21 NumberOfFragments, 73 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 303 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 1713 SizeOfPredicates, 2 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...