/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:10,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:10,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:10,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:10,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:10,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:10,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:10,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:10,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:10,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:10,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:10,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:10,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:10,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:10,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:10,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:10,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:10,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:10,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:10,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:10,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:10,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:10,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:10,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:10,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:10,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:10,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:10,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:10,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:10,995 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:10,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:10,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:10,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:10,998 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:10,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:10,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:10,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:10,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:11,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:11,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:11,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:11,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:11,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:11,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:11,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:11,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:11,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:11,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:11,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:11,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:11,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:11,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:11,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:11,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:11,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:11,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:11,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:11,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:11,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:11,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:11,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:11,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:11,406 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:11,407 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:11,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-11-06 22:45:11,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94cda21e7/dd44db53c7ae4b99998b4f3318609aad/FLAGd2db6249d [2020-11-06 22:45:12,200 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:12,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-11-06 22:45:12,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94cda21e7/dd44db53c7ae4b99998b4f3318609aad/FLAGd2db6249d [2020-11-06 22:45:12,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94cda21e7/dd44db53c7ae4b99998b4f3318609aad [2020-11-06 22:45:12,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:12,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:12,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:12,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:12,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:12,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155d411a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12, skipping insertion in model container [2020-11-06 22:45:12,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:12,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:12,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:12,837 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:12,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:12,873 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:12,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12 WrapperNode [2020-11-06 22:45:12,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:12,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:12,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:12,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:12,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... [2020-11-06 22:45:12,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:12,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:12,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:12,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:12,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:13,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:13,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:13,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:13,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:13,008 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:13,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:13,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:13,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:45:13,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:45:13,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:13,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:13,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:13,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:45:13,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:13,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:13,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:13,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:13,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:13,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:13,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:13,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:13,434 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:13,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:13 BoogieIcfgContainer [2020-11-06 22:45:13,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:13,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:13,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:13,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:13,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:12" (1/3) ... [2020-11-06 22:45:13,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ab98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:13, skipping insertion in model container [2020-11-06 22:45:13,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:12" (2/3) ... [2020-11-06 22:45:13,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ab98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:13, skipping insertion in model container [2020-11-06 22:45:13,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:13" (3/3) ... [2020-11-06 22:45:13,448 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-11-06 22:45:13,468 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:13,471 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:13,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:13,543 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:13,543 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:13,543 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:13,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:13,544 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:13,544 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:13,544 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:13,544 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:45:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:13,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:13,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:13,581 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:13,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-11-06 22:45:13,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:13,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336212617] [2020-11-06 22:45:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:13,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:13,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336212617] [2020-11-06 22:45:13,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:13,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:13,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832051614] [2020-11-06 22:45:14,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:14,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:14,024 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:45:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:14,102 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-11-06 22:45:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:14,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:45:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:14,112 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:45:14,113 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:45:14,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:45:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:45:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-06 22:45:14,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-11-06 22:45:14,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:14,157 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-06 22:45:14,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-06 22:45:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:14,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:14,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:14,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:14,159 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:14,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-11-06 22:45:14,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:14,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905561994] [2020-11-06 22:45:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:14,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905561994] [2020-11-06 22:45:14,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:14,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:45:14,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289801666] [2020-11-06 22:45:14,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:14,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:14,286 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-11-06 22:45:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:14,477 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-06 22:45:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:14,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:45:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:14,479 INFO L225 Difference]: With dead ends: 26 [2020-11-06 22:45:14,479 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:45:14,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:45:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-06 22:45:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:45:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-06 22:45:14,490 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-11-06 22:45:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:14,490 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-06 22:45:14,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-06 22:45:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:14,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:14,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:14,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:14,492 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:14,493 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-11-06 22:45:14,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:14,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438590722] [2020-11-06 22:45:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:14,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438590722] [2020-11-06 22:45:14,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743994580] [2020-11-06 22:45:14,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:45:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:14,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:15,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:15,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:45:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475646849] [2020-11-06 22:45:15,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:45:15,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:45:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:45:15,020 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 15 states. [2020-11-06 22:45:15,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:15,459 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-06 22:45:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:15,459 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-11-06 22:45:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:15,460 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:45:15,461 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:45:15,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:45:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:45:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-06 22:45:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:45:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-06 22:45:15,469 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-11-06 22:45:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:15,470 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-06 22:45:15,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:45:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-06 22:45:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:45:15,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:15,471 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:15,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:15,686 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:15,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-11-06 22:45:15,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:15,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46090825] [2020-11-06 22:45:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:16,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:16,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46090825] [2020-11-06 22:45:16,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532490863] [2020-11-06 22:45:16,030 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 22:45:16,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:16,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:16,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:45:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:16,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:16,281 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:45:16,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:16,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:16,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:16,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:45:16,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400735216] [2020-11-06 22:45:16,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:45:16,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:45:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:45:16,350 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2020-11-06 22:45:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:17,436 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-11-06 22:45:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:45:17,436 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-11-06 22:45:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:17,438 INFO L225 Difference]: With dead ends: 42 [2020-11-06 22:45:17,438 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:45:17,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:45:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:45:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-11-06 22:45:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:45:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:45:17,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-11-06 22:45:17,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:17,447 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:45:17,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:45:17,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:45:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-06 22:45:17,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:17,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:17,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:17,661 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash -992390309, now seen corresponding path program 3 times [2020-11-06 22:45:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:17,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434461302] [2020-11-06 22:45:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:45:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434461302] [2020-11-06 22:45:17,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106645243] [2020-11-06 22:45:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:18,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:45:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-06 22:45:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:18,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:18,366 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-11-06 22:45:18,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:18,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:45:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:18,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:18,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2020-11-06 22:45:18,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697565072] [2020-11-06 22:45:18,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-06 22:45:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-06 22:45:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:45:18,423 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 24 states. [2020-11-06 22:45:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:20,179 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-11-06 22:45:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:45:20,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2020-11-06 22:45:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:20,184 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:45:20,185 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:45:20,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2020-11-06 22:45:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:45:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-11-06 22:45:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:45:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-06 22:45:20,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-11-06 22:45:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:20,196 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-06 22:45:20,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-06 22:45:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-06 22:45:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-06 22:45:20,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:20,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:20,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:20,407 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash 894856061, now seen corresponding path program 1 times [2020-11-06 22:45:20,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:20,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762409477] [2020-11-06 22:45:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762409477] [2020-11-06 22:45:20,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654136431] [2020-11-06 22:45:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:20,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:20,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:45:20,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198222729] [2020-11-06 22:45:20,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:45:20,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:45:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:20,682 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-11-06 22:45:20,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:20,948 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-06 22:45:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:45:20,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-11-06 22:45:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:20,950 INFO L225 Difference]: With dead ends: 47 [2020-11-06 22:45:20,950 INFO L226 Difference]: Without dead ends: 37 [2020-11-06 22:45:20,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:45:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-06 22:45:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-06 22:45:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-06 22:45:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-06 22:45:20,967 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-11-06 22:45:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:20,968 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-06 22:45:20,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:45:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-06 22:45:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-06 22:45:20,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:20,969 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:21,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,185 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1497956552, now seen corresponding path program 2 times [2020-11-06 22:45:21,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:21,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448707003] [2020-11-06 22:45:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448707003] [2020-11-06 22:45:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197074538] [2020-11-06 22:45:21,329 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:45:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:21,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:21,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-06 22:45:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86605575] [2020-11-06 22:45:21,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:45:21,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:21,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:45:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:45:21,434 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-11-06 22:45:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:21,735 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-06 22:45:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:45:21,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-11-06 22:45:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:21,737 INFO L225 Difference]: With dead ends: 50 [2020-11-06 22:45:21,737 INFO L226 Difference]: Without dead ends: 40 [2020-11-06 22:45:21,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:45:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-06 22:45:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-11-06 22:45:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-06 22:45:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-06 22:45:21,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-11-06 22:45:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:21,746 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-06 22:45:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:45:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-06 22:45:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-06 22:45:21,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:21,748 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:21,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:45:21,962 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2088668573, now seen corresponding path program 3 times [2020-11-06 22:45:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:21,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037422217] [2020-11-06 22:45:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:22,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037422217] [2020-11-06 22:45:22,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025461265] [2020-11-06 22:45:22,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-06 22:45:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:22,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:45:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:22,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:22,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-06 22:45:22,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143319886] [2020-11-06 22:45:22,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:45:22,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:22,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:45:22,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:45:22,245 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-11-06 22:45:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:22,630 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-11-06 22:45:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:45:22,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-11-06 22:45:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:22,632 INFO L225 Difference]: With dead ends: 53 [2020-11-06 22:45:22,632 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:45:22,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:45:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:45:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-06 22:45:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:45:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-11-06 22:45:22,641 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-11-06 22:45:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:22,641 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-11-06 22:45:22,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:45:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-11-06 22:45:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-06 22:45:22,642 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:22,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:22,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:22,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:22,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:22,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1041377560, now seen corresponding path program 4 times [2020-11-06 22:45:22,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:22,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66315135] [2020-11-06 22:45:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66315135] [2020-11-06 22:45:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909098272] [2020-11-06 22:45:23,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:45:23,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:45:23,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:23,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:23,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:45:23,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559209546] [2020-11-06 22:45:23,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:45:23,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:45:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:45:23,188 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-11-06 22:45:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:23,573 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-06 22:45:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:45:23,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-11-06 22:45:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:23,574 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:45:23,574 INFO L226 Difference]: Without dead ends: 46 [2020-11-06 22:45:23,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:45:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-06 22:45:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-11-06 22:45:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-06 22:45:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-06 22:45:23,584 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-11-06 22:45:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:23,585 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-06 22:45:23,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:45:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-06 22:45:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:45:23,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:23,587 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:23,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:23,804 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash -162752579, now seen corresponding path program 5 times [2020-11-06 22:45:23,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:23,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136652819] [2020-11-06 22:45:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:23,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:23,848 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:23,871 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:23,871 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:23,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:45:23,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:23 BoogieIcfgContainer [2020-11-06 22:45:23,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:23,914 INFO L168 Benchmark]: Toolchain (without parser) took 11335.84 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 138.6 MB in the beginning and 158.4 MB in the end (delta: -19.8 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:23,915 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 162.5 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:23,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.30 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 128.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:23,916 INFO L168 Benchmark]: Boogie Preprocessor took 36.89 ms. Allocated memory is still 162.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:23,917 INFO L168 Benchmark]: RCFGBuilder took 523.97 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 113.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:23,918 INFO L168 Benchmark]: TraceAbstraction took 10473.09 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 113.5 MB in the beginning and 158.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:23,922 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 162.5 MB. Free memory is still 135.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.30 ms. Allocated memory is still 162.5 MB. Free memory was 138.0 MB in the beginning and 128.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.89 ms. Allocated memory is still 162.5 MB. Free memory was 128.1 MB in the beginning and 126.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 523.97 ms. Allocated memory is still 162.5 MB. Free memory was 126.7 MB in the beginning and 113.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10473.09 ms. Allocated memory was 162.5 MB in the beginning and 234.9 MB in the end (delta: 72.4 MB). Free memory was 113.5 MB in the beginning and 158.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=10, n=2] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=10, n=4] [L24] i++ VAL [i=3, n=10, n=4] [L24] COND TRUE i<=n VAL [i=3, n=4, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=10, n=6] [L24] i++ VAL [i=4, n=6, n=10] [L24] COND TRUE i<=n VAL [i=4, n=10, n=6] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=8, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=12, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=10, n=14] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=16, n=10] [L24] i++ VAL [i=9, n=16, n=10] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=18, n=10] [L24] i++ VAL [i=10, n=18, n=10] [L24] COND TRUE i<=n VAL [i=10, n=10, n=18] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=10, n=18] [L24] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.3s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 249 SDslu, 344 SDs, 0 SdLazy, 906 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=9, 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, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 42378 SizeOfPredicates, 13 NumberOfNonLiveVariables, 767 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 117/716 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 incorrect! Received shutdown request...