/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:29:00,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:29:00,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:29:00,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:29:00,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:29:00,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:29:00,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:29:00,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:29:00,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:29:00,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:29:00,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:29:00,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:29:00,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:29:00,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:29:00,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:29:00,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:29:00,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:29:00,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:29:00,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:29:00,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:29:00,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:29:00,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:29:00,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:29:00,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:29:00,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:29:00,501 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:29:00,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:29:00,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:29:00,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:29:00,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:29:00,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:29:00,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:29:00,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:29:00,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:29:00,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:29:00,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:29:00,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:29:00,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:29:00,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:29:00,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:29:00,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:29:00,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:29:00,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:29:00,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:29:00,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:29:00,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:29:00,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:29:00,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:29:00,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:29:00,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:29:00,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:29:00,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:29:00,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:29:00,790 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:29:00,790 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:29:00,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c [2021-05-02 13:29:00,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3614d6302/bff24734981c47d3a5c40c2f6d7840e8/FLAGb1296da6d [2021-05-02 13:29:01,235 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:29:01,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew1.c [2021-05-02 13:29:01,240 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3614d6302/bff24734981c47d3a5c40c2f6d7840e8/FLAGb1296da6d [2021-05-02 13:29:01,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3614d6302/bff24734981c47d3a5c40c2f6d7840e8 [2021-05-02 13:29:01,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:29:01,649 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:29:01,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:29:01,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:29:01,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:29:01,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@539d5688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01, skipping insertion in model container [2021-05-02 13:29:01,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:29:01,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:29:01,836 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew1.c[403,416] [2021-05-02 13:29:01,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:29:01,858 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:29:01,868 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/vnew1.c[403,416] [2021-05-02 13:29:01,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:29:01,892 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:29:01,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01 WrapperNode [2021-05-02 13:29:01,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:29:01,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:29:01,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:29:01,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:29:01,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... [2021-05-02 13:29:01,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:29:01,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:29:01,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:29:01,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:29:01,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:29:02,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:29:02,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:29:02,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:29:02,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:29:02,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:29:02,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:29:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:29:02,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:29:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:29:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:29:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:29:02,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:29:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 13:29:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:29:02,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:29:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:29:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:29:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:29:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:29:02,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:29:02,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:29:02,310 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:29:02,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:29:02 BoogieIcfgContainer [2021-05-02 13:29:02,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:29:02,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:29:02,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:29:02,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:29:02,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:29:01" (1/3) ... [2021-05-02 13:29:02,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4cf5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:29:02, skipping insertion in model container [2021-05-02 13:29:02,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:29:01" (2/3) ... [2021-05-02 13:29:02,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4cf5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:29:02, skipping insertion in model container [2021-05-02 13:29:02,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:29:02" (3/3) ... [2021-05-02 13:29:02,333 INFO L111 eAbstractionObserver]: Analyzing ICFG vnew1.c [2021-05-02 13:29:02,338 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:29:02,341 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:29:02,370 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:29:02,405 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:29:02,405 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:29:02,405 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:29:02,405 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:29:02,405 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:29:02,405 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:29:02,405 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:29:02,405 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:29:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:29:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:29:02,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:29:02,436 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:29:02,437 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:29:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:29:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash 486508050, now seen corresponding path program 1 times [2021-05-02 13:29:02,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:29:02,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261608011] [2021-05-02 13:29:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:29:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:29:02,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:29:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:29:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:29:02,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:29:02,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261608011] [2021-05-02 13:29:02,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261608011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:29:02,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:29:02,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:29:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089557670] [2021-05-02 13:29:02,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:29:02,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:29:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:29:02,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:29:02,811 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:29:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:29:03,103 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-02 13:29:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:29:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 13:29:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:29:03,110 INFO L225 Difference]: With dead ends: 44 [2021-05-02 13:29:03,110 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:29:03,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:29:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:29:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 13:29:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:29:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-05-02 13:29:03,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2021-05-02 13:29:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:29:03,141 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-05-02 13:29:03,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:29:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-05-02 13:29:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:29:03,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:29:03,146 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:29:03,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:29:03,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:29:03,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:29:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 77944193, now seen corresponding path program 1 times [2021-05-02 13:29:03,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:29:03,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739468643] [2021-05-02 13:29:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:29:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:29:03,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:29:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:29:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:29:03,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:29:03,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739468643] [2021-05-02 13:29:03,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739468643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:29:03,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664654017] [2021-05-02 13:29:03,485 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 [2021-05-02 13:29:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:29:03,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:29:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:29:03,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:03,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:29:04,134 WARN L159 QuantifierPusher]: Ignoring assumption.