/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-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:25,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:25,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:25,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:25,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:25,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:25,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:25,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:25,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:25,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:25,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:25,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:25,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:25,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:25,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:25,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:25,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:25,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:25,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:25,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:25,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:25,793 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:25,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:25,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:25,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:25,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:25,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:25,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:25,831 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 22:46:25,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:25,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:25,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:25,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:25,898 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:25,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:25,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:25,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:25,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:25,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:25,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:25,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:25,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:25,901 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:25,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:25,902 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:25,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:25,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:25,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:25,903 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:25,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:25,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:25,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:25,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:25,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:25,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:25,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:25,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:25,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:25,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:26,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:26,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:26,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:26,439 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:26,440 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:26,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-11-06 22:46:26,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/479482d17/a07383b919324f3c933e279b0400ee3f/FLAG2e4c38644 [2020-11-06 22:46:27,210 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:27,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-11-06 22:46:27,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/479482d17/a07383b919324f3c933e279b0400ee3f/FLAG2e4c38644 [2020-11-06 22:46:27,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/479482d17/a07383b919324f3c933e279b0400ee3f [2020-11-06 22:46:27,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:27,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:27,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:27,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:27,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:27,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f7b29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27, skipping insertion in model container [2020-11-06 22:46:27,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:27,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:27,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:27,797 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:27,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:27,833 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:27,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27 WrapperNode [2020-11-06 22:46:27,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:27,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:27,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:27,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:27,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (1/1) ... [2020-11-06 22:46:27,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:27,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:27,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:27,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:27,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (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 22:46:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:27,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:27,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:27,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:27,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:27,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:27,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:27,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:27,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:28,515 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:28,516 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:28,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:28 BoogieIcfgContainer [2020-11-06 22:46:28,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:28,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:28,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:28,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:28,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:27" (1/3) ... [2020-11-06 22:46:28,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f879c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:28, skipping insertion in model container [2020-11-06 22:46:28,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:27" (2/3) ... [2020-11-06 22:46:28,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9f879c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:28, skipping insertion in model container [2020-11-06 22:46:28,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:28" (3/3) ... [2020-11-06 22:46:28,531 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-11-06 22:46:28,549 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:28,553 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:28,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:28,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:28,631 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:28,631 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:28,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:28,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:28,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:28,632 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:28,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:46:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:28,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:28,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:28,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:28,678 INFO L82 PathProgramCache]: Analyzing trace with hash -875364728, now seen corresponding path program 1 times [2020-11-06 22:46:28,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:28,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962486383] [2020-11-06 22:46:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:28,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,016 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 22:46:29,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962486383] [2020-11-06 22:46:29,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:29,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:46:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725768790] [2020-11-06 22:46:29,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:46:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:46:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:29,042 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:46:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:29,149 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-11-06 22:46:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:46:29,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-06 22:46:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:29,170 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:46:29,170 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:46:29,176 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 [2020-11-06 22:46:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:46:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:46:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:46:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-06 22:46:29,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 14 [2020-11-06 22:46:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:29,229 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-06 22:46:29,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:46:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-06 22:46:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:29,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:29,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:29,231 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash -130412156, now seen corresponding path program 1 times [2020-11-06 22:46:29,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:29,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352927675] [2020-11-06 22:46:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,418 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 22:46:29,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352927675] [2020-11-06 22:46:29,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:29,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:46:29,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630701004] [2020-11-06 22:46:29,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:46:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:46:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:46:29,423 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-11-06 22:46:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:29,524 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-06 22:46:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:46:29,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-06 22:46:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:29,526 INFO L225 Difference]: With dead ends: 23 [2020-11-06 22:46:29,527 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:46:29,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:46:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:46:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:46:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:46:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-06 22:46:29,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-06 22:46:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:29,537 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-06 22:46:29,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:46:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-06 22:46:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:46:29,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:29,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:29,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:29,538 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash -958125858, now seen corresponding path program 1 times [2020-11-06 22:46:29,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:29,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205530361] [2020-11-06 22:46:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,721 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 22:46:29,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205530361] [2020-11-06 22:46:29,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261612822] [2020-11-06 22:46:29,722 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 22:46:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:46:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:29,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:29,969 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 22:46:29,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:29,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-06 22:46:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959039140] [2020-11-06 22:46:29,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:46:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:46:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:46:29,973 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-11-06 22:46:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:30,378 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-06 22:46:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:30,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-11-06 22:46:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:30,381 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:46:30,382 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:46:30,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:46:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:46:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:46:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-06 22:46:30,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-11-06 22:46:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:30,391 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-06 22:46:30,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:46:30,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-06 22:46:30,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:46:30,392 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:30,392 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:30,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:46:30,606 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash -847446844, now seen corresponding path program 2 times [2020-11-06 22:46:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:30,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724419382] [2020-11-06 22:46:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:30,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:30,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724419382] [2020-11-06 22:46:30,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207656767] [2020-11-06 22:46:30,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:30,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:30,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:46:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:31,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:31,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:31,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2020-11-06 22:46:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120820737] [2020-11-06 22:46:31,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:46:31,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:46:31,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:31,185 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-11-06 22:46:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:31,497 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-06 22:46:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:46:31,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-06 22:46:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:31,499 INFO L225 Difference]: With dead ends: 25 [2020-11-06 22:46:31,499 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:46:31,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:46:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:46:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:46:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:46:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:46:31,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-11-06 22:46:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:31,506 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:46:31,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:46:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:46:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:46:31,507 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:31,508 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:31,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:31,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1711364706, now seen corresponding path program 3 times [2020-11-06 22:46:31,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:31,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38691872] [2020-11-06 22:46:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:31,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-06 22:46:31,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38691872] [2020-11-06 22:46:31,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:31,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:46:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514206050] [2020-11-06 22:46:31,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:46:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:46:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:46:31,824 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-11-06 22:46:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:32,001 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-11-06 22:46:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:46:32,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-06 22:46:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:32,002 INFO L225 Difference]: With dead ends: 18 [2020-11-06 22:46:32,002 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:32,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:32,004 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-11-06 22:46:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:32,004 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:32,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:46:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:32,005 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:32,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:46:32,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:32,199 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:32,200 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:32,200 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:32,200 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:32,200 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:32,200 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:32,201 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-06 22:46:32,201 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:32,201 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:32,201 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:32,201 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:32,201 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L266 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-11-06 22:46:32,202 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 35) the Hoare annotation is: true [2020-11-06 22:46:32,203 INFO L266 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-11-06 22:46:32,203 INFO L262 CegarLoopResult]: At program point L29-2(lines 29 32) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2020-11-06 22:46:32,203 INFO L262 CegarLoopResult]: At program point L29-3(lines 29 32) the Hoare annotation is: (or (and (<= (+ main_~x~0 53) (* 2 main_~y~0)) (<= 27 main_~y~0)) (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0))) [2020-11-06 22:46:32,203 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 24 35) no Hoare annotation was computed. [2020-11-06 22:46:32,203 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 24 35) no Hoare annotation was computed. [2020-11-06 22:46:32,203 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:32,204 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:32,204 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:32,204 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:46:32,204 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:32,204 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:32,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:32 BoogieIcfgContainer [2020-11-06 22:46:32,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:32,224 INFO L168 Benchmark]: Toolchain (without parser) took 4639.38 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.2 MB in the beginning and 98.1 MB in the end (delta: 42.2 MB). Peak memory consumption was 77.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:32,224 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 164.6 MB. Free memory is still 143.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:32,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.61 ms. Allocated memory is still 164.6 MB. Free memory was 139.6 MB in the beginning and 130.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:32,226 INFO L168 Benchmark]: Boogie Preprocessor took 39.85 ms. Allocated memory is still 164.6 MB. Free memory was 130.3 MB in the beginning and 128.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:32,227 INFO L168 Benchmark]: RCFGBuilder took 642.71 ms. Allocated memory is still 164.6 MB. Free memory was 128.7 MB in the beginning and 115.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:32,228 INFO L168 Benchmark]: TraceAbstraction took 3699.96 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 115.3 MB in the beginning and 98.1 MB in the end (delta: 17.2 MB). Peak memory consumption was 52.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:32,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 164.6 MB. Free memory is still 143.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.61 ms. Allocated memory is still 164.6 MB. Free memory was 139.6 MB in the beginning and 130.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.85 ms. Allocated memory is still 164.6 MB. Free memory was 130.3 MB in the beginning and 128.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 642.71 ms. Allocated memory is still 164.6 MB. Free memory was 128.7 MB in the beginning and 115.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3699.96 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 115.3 MB in the beginning and 98.1 MB in the end (delta: 17.2 MB). Peak memory consumption was 52.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 29]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 54 SDslu, 106 SDs, 0 SdLazy, 175 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 27 NumberOfFragments, 65 HoareAnnotationTreeSize, 21 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 226 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 4718 SizeOfPredicates, 6 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/14 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...