/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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:44:16,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:44:16,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:44:16,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:44:16,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:44:16,103 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:44:16,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:44:16,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:44:16,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:44:16,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:44:16,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:44:16,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:44:16,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:44:16,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:44:16,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:44:16,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:44:16,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:44:16,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:44:16,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:44:16,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:44:16,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:44:16,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:44:16,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:44:16,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:44:16,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:44:16,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:44:16,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:44:16,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:44:16,147 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 [2020-10-23 18:44:16,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:44:16,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:44:16,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:44:16,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:44:16,183 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:44:16,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:44:16,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:44:16,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:44:16,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:44:16,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:44:16,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:44:16,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:44:16,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:44:16,186 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:44:16,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:44:16,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:44:16,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:44:16,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:44:16,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:44:16,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:44:16,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:44:16,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:44:16,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:44:16,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:44:16,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:44:16,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:44:16,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:44:16,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:44:16,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:44:16,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:44:16,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:44:16,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:44:16,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:44:16,664 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:44:16,665 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:44:16,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-23 18:44:16,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef4c607ae/4f204280d12d4a0bab9a8194b0fa6c8f/FLAG380fab1c3 [2020-10-23 18:44:17,417 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:44:17,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-23 18:44:17,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef4c607ae/4f204280d12d4a0bab9a8194b0fa6c8f/FLAG380fab1c3 [2020-10-23 18:44:17,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef4c607ae/4f204280d12d4a0bab9a8194b0fa6c8f [2020-10-23 18:44:17,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:44:17,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:44:17,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:17,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:44:17,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:44:17,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:17" (1/1) ... [2020-10-23 18:44:17,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714d806a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:17, skipping insertion in model container [2020-10-23 18:44:17,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:17" (1/1) ... [2020-10-23 18:44:17,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:44:17,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:44:17,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:17,992 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:44:18,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:18,031 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:44:18,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18 WrapperNode [2020-10-23 18:44:18,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:18,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:44:18,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:44:18,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:44:18,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:44:18,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:44:18,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:44:18,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:44:18,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (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 [2020-10-23 18:44:18,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:44:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:44:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:44:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:44:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:44:18,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:44:18,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:44:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:44:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:44:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:44:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:44:18,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:44:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:44:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:44:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:44:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:44:18,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:44:18,642 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:44:18,642 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:44:18,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:18 BoogieIcfgContainer [2020-10-23 18:44:18,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:44:18,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:44:18,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:44:18,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:44:18,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:44:17" (1/3) ... [2020-10-23 18:44:18,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2574c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:18, skipping insertion in model container [2020-10-23 18:44:18,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (2/3) ... [2020-10-23 18:44:18,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2574c25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:18, skipping insertion in model container [2020-10-23 18:44:18,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:18" (3/3) ... [2020-10-23 18:44:18,654 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-10-23 18:44:18,691 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:44:18,703 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:44:18,718 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:44:18,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:44:18,782 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:44:18,782 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:44:18,782 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:44:18,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:44:18,783 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:44:18,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:44:18,783 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:44:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-23 18:44:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:44:18,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:18,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:18,817 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1957209487, now seen corresponding path program 1 times [2020-10-23 18:44:18,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:18,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791568661] [2020-10-23 18:44:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791568661] [2020-10-23 18:44:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:19,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176603383] [2020-10-23 18:44:19,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:19,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:19,365 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 6 states. [2020-10-23 18:44:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:19,742 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-10-23 18:44:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:19,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-23 18:44:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:19,753 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:44:19,754 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:44:19,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:44:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 18:44:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 18:44:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-23 18:44:19,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 18 [2020-10-23 18:44:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:19,805 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-23 18:44:19,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-23 18:44:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:44:19,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:19,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:19,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:44:19,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 807153860, now seen corresponding path program 1 times [2020-10-23 18:44:19,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:19,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923082578] [2020-10-23 18:44:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:19,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923082578] [2020-10-23 18:44:19,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:19,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:19,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071456737] [2020-10-23 18:44:19,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:19,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:19,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:19,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:19,914 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-10-23 18:44:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:20,222 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-23 18:44:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:20,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-23 18:44:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:20,224 INFO L225 Difference]: With dead ends: 45 [2020-10-23 18:44:20,225 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:44:20,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:20,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:44:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2020-10-23 18:44:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:44:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-23 18:44:20,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 19 [2020-10-23 18:44:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:20,239 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-23 18:44:20,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-23 18:44:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:44:20,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:20,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:20,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:44:20,241 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:20,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1528075300, now seen corresponding path program 1 times [2020-10-23 18:44:20,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:20,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301970241] [2020-10-23 18:44:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:44:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:20,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301970241] [2020-10-23 18:44:20,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:20,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:20,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552455965] [2020-10-23 18:44:20,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:20,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:20,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:20,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:20,337 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2020-10-23 18:44:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:20,576 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-23 18:44:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:20,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-23 18:44:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:20,579 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:44:20,579 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:44:20,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:44:20,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-23 18:44:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-23 18:44:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-23 18:44:20,592 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 23 [2020-10-23 18:44:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:20,593 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-23 18:44:20,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-23 18:44:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:44:20,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:20,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:20,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:44:20,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash -809203629, now seen corresponding path program 1 times [2020-10-23 18:44:20,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:20,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571373258] [2020-10-23 18:44:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 18:44:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571373258] [2020-10-23 18:44:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297993867] [2020-10-23 18:44:20,763 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 [2020-10-23 18:44:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:44:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:44:21,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:44:21,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2020-10-23 18:44:21,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531930763] [2020-10-23 18:44:21,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:44:21,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:21,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:44:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:21,305 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 5 states. [2020-10-23 18:44:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:21,475 INFO L93 Difference]: Finished difference Result 111 states and 141 transitions. [2020-10-23 18:44:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:44:21,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-23 18:44:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:21,478 INFO L225 Difference]: With dead ends: 111 [2020-10-23 18:44:21,478 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:44:21,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:44:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2020-10-23 18:44:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:44:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-23 18:44:21,498 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2020-10-23 18:44:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:21,498 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-23 18:44:21,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:44:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-23 18:44:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:44:21,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:21,500 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:21,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:21,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash -750574849, now seen corresponding path program 1 times [2020-10-23 18:44:21,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:21,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681167099] [2020-10-23 18:44:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 18:44:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:44:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:44:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681167099] [2020-10-23 18:44:21,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505976201] [2020-10-23 18:44:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-23 18:44:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:44:21,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:44:22,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:22,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2020-10-23 18:44:22,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004968141] [2020-10-23 18:44:22,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:44:22,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:44:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:22,020 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 13 states. [2020-10-23 18:44:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:23,267 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2020-10-23 18:44:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:44:23,268 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-23 18:44:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:23,268 INFO L225 Difference]: With dead ends: 103 [2020-10-23 18:44:23,269 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:23,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:44:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:23,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-23 18:44:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:23,272 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:23,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:44:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:23,272 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:23,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:23,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:24,200 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2020-10-23 18:44:24,262 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:24,263 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:24,263 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:24,263 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:24,263 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:24,263 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:24,263 INFO L270 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)|)) [2020-10-23 18:44:24,264 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:24,264 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:24,264 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:24,269 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:24,269 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:24,269 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:24,269 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:24,270 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:24,270 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:24,270 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 48) no Hoare annotation was computed. [2020-10-23 18:44:24,270 INFO L270 CegarLoopResult]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-10-23 18:44:24,270 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-23 18:44:24,271 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-23 18:44:24,271 INFO L270 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-23 18:44:24,271 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-10-23 18:44:24,271 INFO L274 CegarLoopResult]: For program point L37-1(lines 36 38) no Hoare annotation was computed. [2020-10-23 18:44:24,271 INFO L274 CegarLoopResult]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2020-10-23 18:44:24,271 INFO L270 CegarLoopResult]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and (<= main_~n~0 main_~j~0) .cse0 .cse1) (and (= main_~i~0 0) .cse0 .cse1))) [2020-10-23 18:44:24,272 INFO L274 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2020-10-23 18:44:24,272 INFO L274 CegarLoopResult]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2020-10-23 18:44:24,272 INFO L277 CegarLoopResult]: At program point L46(lines 24 48) the Hoare annotation is: true [2020-10-23 18:44:24,272 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 48) no Hoare annotation was computed. [2020-10-23 18:44:24,272 INFO L274 CegarLoopResult]: For program point L42(lines 34 44) no Hoare annotation was computed. [2020-10-23 18:44:24,272 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 44) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-23 18:44:24,272 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 48) the Hoare annotation is: true [2020-10-23 18:44:24,273 INFO L274 CegarLoopResult]: For program point L35(lines 35 43) no Hoare annotation was computed. [2020-10-23 18:44:24,273 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:24,273 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:24,273 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:24,273 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:44:24,273 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:24,273 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:24,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:24 BoogieIcfgContainer [2020-10-23 18:44:24,291 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:24,293 INFO L168 Benchmark]: Toolchain (without parser) took 6525.76 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.3 MB in the beginning and 159.7 MB in the end (delta: -26.4 MB). Peak memory consumption was 103.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:24,294 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 81.4 MB in the beginning and 81.1 MB in the end (delta: 361.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:24,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.48 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 123.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:24,296 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 121.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:24,296 INFO L168 Benchmark]: RCFGBuilder took 572.23 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 105.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:24,297 INFO L168 Benchmark]: TraceAbstraction took 5645.11 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 105.2 MB in the beginning and 159.7 MB in the end (delta: -54.6 MB). Peak memory consumption was 76.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:24,301 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 125.8 MB. Free memory was 81.4 MB in the beginning and 81.1 MB in the end (delta: 361.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.48 ms. Allocated memory is still 158.3 MB. Free memory was 132.7 MB in the beginning and 123.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.38 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 121.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 572.23 ms. Allocated memory is still 158.3 MB. Free memory was 121.6 MB in the beginning and 105.6 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5645.11 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 105.2 MB in the beginning and 159.7 MB in the end (delta: -54.6 MB). Peak memory consumption was 76.4 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: 36]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((n <= j && n <= k) && k <= n) || ((i == 0 && n <= k) && k <= n) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (2 * i <= j && n <= k) && k <= n - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 129 SDtfs, 204 SDslu, 216 SDs, 0 SdLazy, 552 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, 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, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 66 PreInvPairs, 98 NumberOfFragments, 141 HoareAnnotationTreeSize, 66 FomulaSimplifications, 5701 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 1049 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 175 ConstructedInterpolants, 1 QuantifiedInterpolants, 13469 SizeOfPredicates, 7 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 26/32 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...