/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/loop-invgen/apache-escape-absolute.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:21:32,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:21:32,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:21:32,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:21:32,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:21:32,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:21:32,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:21:32,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:21:32,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:21:32,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:21:32,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:21:32,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:21:32,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:21:32,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:21:32,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:21:32,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:21:32,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:21:32,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:21:32,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:21:32,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:21:32,423 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 12:21:32,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:21:32,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:21:32,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:21:32,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:21:32,448 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:21:32,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:21:32,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:21:32,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:21:32,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:21:32,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:21:32,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:21:32,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:21:32,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:21:32,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:21:32,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:21:32,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:21:32,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:21:32,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:21:32,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:21:32,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:21:32,706 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:21:32,707 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:21:32,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-02 12:21:32,751 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42789a370/0f5039943f7f4b71896ed03fb5b7d005/FLAG5a500f578 [2021-05-02 12:21:33,074 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:21:33,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i [2021-05-02 12:21:33,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42789a370/0f5039943f7f4b71896ed03fb5b7d005/FLAG5a500f578 [2021-05-02 12:21:33,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42789a370/0f5039943f7f4b71896ed03fb5b7d005 [2021-05-02 12:21:33,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:21:33,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:21:33,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:21:33,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:21:33,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:21:33,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b041d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33, skipping insertion in model container [2021-05-02 12:21:33,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:21:33,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:21:33,610 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2021-05-02 12:21:33,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:21:33,628 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:21:33,636 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i[893,906] [2021-05-02 12:21:33,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:21:33,665 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:21:33,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33 WrapperNode [2021-05-02 12:21:33,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:21:33,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:21:33,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:21:33,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:21:33,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (1/1) ... [2021-05-02 12:21:33,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:21:33,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:21:33,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:21:33,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:21:33,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (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 12:21:33,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:21:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:21:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:21:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:21:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:21:33,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:21:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:21:33,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:21:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:21:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:21:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:21:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:21:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:21:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:21:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:21:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:21:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:21:34,067 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:21:34,068 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 12:21:34,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:21:34 BoogieIcfgContainer [2021-05-02 12:21:34,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:21:34,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:21:34,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:21:34,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:21:34,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:21:33" (1/3) ... [2021-05-02 12:21:34,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b754a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:21:34, skipping insertion in model container [2021-05-02 12:21:34,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:21:33" (2/3) ... [2021-05-02 12:21:34,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33b754a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:21:34, skipping insertion in model container [2021-05-02 12:21:34,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:21:34" (3/3) ... [2021-05-02 12:21:34,077 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i [2021-05-02 12:21:34,080 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:21:34,083 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:21:34,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:21:34,120 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:21:34,121 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:21:34,121 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:21:34,121 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:21:34,121 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:21:34,121 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:21:34,121 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:21:34,121 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:21:34,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 12:21:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 12:21:34,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:34,143 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:34,143 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:34,148 INFO L82 PathProgramCache]: Analyzing trace with hash -494472251, now seen corresponding path program 1 times [2021-05-02 12:21:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:34,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742502104] [2021-05-02 12:21:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:34,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:34,399 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 12:21:34,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:34,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742502104] [2021-05-02 12:21:34,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742502104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:34,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:34,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:21:34,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935669414] [2021-05-02 12:21:34,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:21:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:21:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:21:34,413 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 33 states have internal predecessors, (48), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:21:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:35,026 INFO L93 Difference]: Finished difference Result 112 states and 207 transitions. [2021-05-02 12:21:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:21:35,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-05-02 12:21:35,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:35,036 INFO L225 Difference]: With dead ends: 112 [2021-05-02 12:21:35,036 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 12:21:35,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:21:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 12:21:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2021-05-02 12:21:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 35 states have internal predecessors, (37), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 12:21:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2021-05-02 12:21:35,099 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 17 [2021-05-02 12:21:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:35,100 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2021-05-02 12:21:35,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 12:21:35,100 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2021-05-02 12:21:35,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 12:21:35,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:35,101 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:35,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:21:35,101 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash -730438524, now seen corresponding path program 1 times [2021-05-02 12:21:35,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:35,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860329674] [2021-05-02 12:21:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:21:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:21:35,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:35,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860329674] [2021-05-02 12:21:35,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860329674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:35,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:35,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:21:35,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319390058] [2021-05-02 12:21:35,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:21:35,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:35,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:21:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:21:35,174 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:21:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:35,457 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2021-05-02 12:21:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:21:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 12:21:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:35,460 INFO L225 Difference]: With dead ends: 63 [2021-05-02 12:21:35,460 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 12:21:35,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:21:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 12:21:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 12:21:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 12:21:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2021-05-02 12:21:35,469 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2021-05-02 12:21:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:35,469 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2021-05-02 12:21:35,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:21:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2021-05-02 12:21:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 12:21:35,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:35,470 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:35,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:21:35,471 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1977228752, now seen corresponding path program 1 times [2021-05-02 12:21:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172924447] [2021-05-02 12:21:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:21:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 12:21:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 12:21:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 12:21:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-05-02 12:21:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-05-02 12:21:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 12:21:35,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172924447] [2021-05-02 12:21:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172924447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:35,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:35,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:21:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141279971] [2021-05-02 12:21:35,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:21:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:21:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:21:35,539 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 12:21:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:35,712 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2021-05-02 12:21:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:21:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2021-05-02 12:21:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:35,713 INFO L225 Difference]: With dead ends: 90 [2021-05-02 12:21:35,713 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 12:21:35,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:21:35,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 12:21:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 12:21:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 38 states have internal predecessors, (38), 22 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 12:21:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-05-02 12:21:35,721 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 51 [2021-05-02 12:21:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:35,721 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-05-02 12:21:35,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 12:21:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-05-02 12:21:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 12:21:35,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:35,723 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:35,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 12:21:35,723 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:35,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1335676676, now seen corresponding path program 1 times [2021-05-02 12:21:35,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:35,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853313193] [2021-05-02 12:21:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:21:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 12:21:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 12:21:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 12:21:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 12:21:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 12:21:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 12:21:35,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:35,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853313193] [2021-05-02 12:21:35,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853313193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:35,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:35,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:21:35,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861401202] [2021-05-02 12:21:35,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:21:35,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:35,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:21:35,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:21:35,811 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 12:21:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:36,075 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-05-02 12:21:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:21:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-02 12:21:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:36,076 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:21:36,076 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 12:21:36,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:21:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 12:21:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 12:21:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 41 states have internal predecessors, (41), 22 states have call successors, (22), 6 states have call predecessors, (22), 5 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 12:21:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2021-05-02 12:21:36,084 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 52 [2021-05-02 12:21:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:36,084 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2021-05-02 12:21:36,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 12:21:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2021-05-02 12:21:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 12:21:36,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:36,086 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:36,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 12:21:36,087 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:36,087 INFO L82 PathProgramCache]: Analyzing trace with hash -296574164, now seen corresponding path program 1 times [2021-05-02 12:21:36,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:36,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631427057] [2021-05-02 12:21:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:21:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 12:21:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 12:21:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 12:21:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 12:21:36,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 12:21:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 12:21:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 12:21:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 12:21:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 12:21:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-02 12:21:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-02 12:21:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 12:21:36,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:36,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631427057] [2021-05-02 12:21:36,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631427057] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:36,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:36,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:21:36,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513710184] [2021-05-02 12:21:36,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:21:36,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:21:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:21:36,162 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 12:21:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:36,403 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2021-05-02 12:21:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:21:36,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2021-05-02 12:21:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:36,405 INFO L225 Difference]: With dead ends: 74 [2021-05-02 12:21:36,405 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:21:36,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:21:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:21:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-05-02 12:21:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.1) internal successors, (44), 44 states have internal predecessors, (44), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 12:21:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-05-02 12:21:36,413 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 87 [2021-05-02 12:21:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:36,413 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-05-02 12:21:36,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 12:21:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-05-02 12:21:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 12:21:36,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:21:36,414 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:21:36,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 12:21:36,415 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:21:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:21:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1057322499, now seen corresponding path program 1 times [2021-05-02 12:21:36,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:21:36,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929627351] [2021-05-02 12:21:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:21:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:21:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:21:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 12:21:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 12:21:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 12:21:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 12:21:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 12:21:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 12:21:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 12:21:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-05-02 12:21:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-05-02 12:21:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-05-02 12:21:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-05-02 12:21:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-05-02 12:21:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:21:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-02 12:21:36,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:21:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929627351] [2021-05-02 12:21:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929627351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:21:36,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:21:36,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:21:36,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863315436] [2021-05-02 12:21:36,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:21:36,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:21:36,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:21:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:21:36,513 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 12:21:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:21:36,799 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 12:21:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:21:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 92 [2021-05-02 12:21:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:21:36,801 INFO L225 Difference]: With dead ends: 75 [2021-05-02 12:21:36,801 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:21:36,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:21:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:21:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:21:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:21:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:21:36,802 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-05-02 12:21:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:21:36,802 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:21:36,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 12:21:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:21:36,802 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:21:36,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 12:21:36,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:21:37,421 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:21:37,421 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:21:37,421 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:21:37,422 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 83) no Hoare annotation was computed. [2021-05-02 12:21:37,422 INFO L198 CegarLoopUtils]: For program point L44(lines 44 80) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L69(lines 69 75) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L36(lines 25 83) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L69-1(lines 69 75) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L61(lines 61 79) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L194 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,423 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,423 INFO L194 CegarLoopUtils]: At program point L45-1(line 45) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L37(lines 25 83) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point L54(lines 44 80) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 83) no Hoare annotation was computed. [2021-05-02 12:21:37,423 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 main_~c~0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,423 INFO L194 CegarLoopUtils]: At program point L71-1(line 71) the Hoare annotation is: (and (<= 1 main_~c~0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L63(line 63) the Hoare annotation is: (and (= main_~c~0 0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L63-1(line 63) the Hoare annotation is: (and (= main_~c~0 0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 83) the Hoare annotation is: true [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L47-1(lines 46 52) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 52) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L72(line 72) the Hoare annotation is: (and (<= 1 main_~c~0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L56-1(line 56) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L201 CegarLoopUtils]: At program point L81(lines 25 83) the Hoare annotation is: true [2021-05-02 12:21:37,424 INFO L198 CegarLoopUtils]: For program point L48(line 48) no Hoare annotation was computed. [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L73(line 73) the Hoare annotation is: (and (<= 1 main_~c~0) (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (<= (+ main_~c~0 1) main_~tokenlen~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,424 INFO L198 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2021-05-02 12:21:37,424 INFO L194 CegarLoopUtils]: At program point L65-1(lines 64 77) the Hoare annotation is: (let ((.cse0 (< 0 (+ main_~scheme~0 1))) (.cse1 (<= 1 main_~cp~0)) (.cse2 (< main_~cp~0 main_~urilen~0))) (or (and (<= 1 main_~c~0) .cse0 .cse1 .cse2) (and (= main_~c~0 0) .cse0 .cse1 .cse2))) [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L57(lines 44 80) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L49-1(line 49) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (not (= (+ main_~cp~0 1) main_~urilen~0)) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L33(line 33) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L50(line 50) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (and (< 0 (+ main_~scheme~0 1)) (<= 1 main_~cp~0) (< main_~cp~0 main_~urilen~0)) [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L67(line 67) the Hoare annotation is: (let ((.cse0 (< 0 (+ main_~scheme~0 1))) (.cse1 (<= 1 main_~cp~0)) (.cse2 (<= (+ main_~c~0 2) main_~tokenlen~0)) (.cse3 (not (= (+ main_~cp~0 1) main_~urilen~0))) (.cse4 (< main_~cp~0 main_~urilen~0))) (or (and (<= 1 main_~c~0) .cse0 .cse1 .cse2 .cse3 .cse4) (and (= main_~c~0 0) .cse0 .cse1 .cse2 .cse3 .cse4))) [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L34(line 34) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L194 CegarLoopUtils]: At program point L67-1(line 67) the Hoare annotation is: (let ((.cse0 (< 0 (+ main_~scheme~0 1))) (.cse1 (<= 1 main_~cp~0)) (.cse2 (<= (+ main_~c~0 2) main_~tokenlen~0)) (.cse3 (not (= (+ main_~cp~0 1) main_~urilen~0))) (.cse4 (< main_~cp~0 main_~urilen~0))) (or (and (<= 1 main_~c~0) .cse0 .cse1 .cse2 .cse3 .cse4) (and (= main_~c~0 0) .cse0 .cse1 .cse2 .cse3 .cse4))) [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L68(line 68) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2021-05-02 12:21:37,425 INFO L198 CegarLoopUtils]: For program point L35-1(lines 25 83) no Hoare annotation was computed. [2021-05-02 12:21:37,426 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:21:37,426 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:21:37,426 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:21:37,426 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:21:37,426 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:21:37,426 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:21:37,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:21:37 BoogieIcfgContainer [2021-05-02 12:21:37,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:21:37,437 INFO L168 Benchmark]: Toolchain (without parser) took 3933.49 ms. Allocated memory was 190.8 MB in the beginning and 280.0 MB in the end (delta: 89.1 MB). Free memory was 156.3 MB in the beginning and 239.5 MB in the end (delta: -83.2 MB). Peak memory consumption was 148.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:21:37,438 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory was 172.6 MB in the beginning and 172.5 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:21:37,438 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.50 ms. Allocated memory is still 190.8 MB. Free memory was 156.1 MB in the beginning and 172.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-02 12:21:37,438 INFO L168 Benchmark]: Boogie Preprocessor took 58.91 ms. Allocated memory is still 190.8 MB. Free memory was 172.9 MB in the beginning and 172.5 MB in the end (delta: 351.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:21:37,438 INFO L168 Benchmark]: RCFGBuilder took 342.97 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 152.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:21:37,439 INFO L168 Benchmark]: TraceAbstraction took 3366.86 ms. Allocated memory was 190.8 MB in the beginning and 280.0 MB in the end (delta: 89.1 MB). Free memory was 151.5 MB in the beginning and 239.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 143.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:21:37,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 190.8 MB. Free memory was 172.6 MB in the beginning and 172.5 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.50 ms. Allocated memory is still 190.8 MB. Free memory was 156.1 MB in the beginning and 172.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.91 ms. Allocated memory is still 190.8 MB. Free memory was 172.9 MB in the beginning and 172.5 MB in the end (delta: 351.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.97 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 152.0 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3366.86 ms. Allocated memory was 190.8 MB in the beginning and 280.0 MB in the end (delta: 89.1 MB). Free memory was 151.5 MB in the beginning and 239.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 143.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2684.4ms, OverallIterations: 6, TraceHistogramMax: 14, EmptinessCheckTime: 12.3ms, AutomataDifference: 1896.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 617.9ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 294 SDtfs, 277 SDslu, 334 SDs, 0 SdLazy, 1031 SolverSat, 319 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1002.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 587.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=5, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 81.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 26 LocationsWithAnnotation, 76 PreInvPairs, 105 NumberOfFragments, 469 HoareAnnotationTreeSize, 76 FomulaSimplifications, 1072 FormulaSimplificationTreeSizeReduction, 104.8ms HoareSimplificationTime, 26 FomulaSimplificationsInter, 747 FormulaSimplificationTreeSizeReductionInter, 495.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 17.5ms SsaConstructionTime, 82.2ms SatisfiabilityAnalysisTime, 483.8ms InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 610 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 772/772 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (0 < scheme + 1 && 1 <= cp) && cp < urilen - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((1 <= c && 0 < scheme + 1) && 1 <= cp) && cp < urilen) || (((c == 0 && 0 < scheme + 1) && 1 <= cp) && cp < urilen) RESULT: Ultimate proved your program to be correct! Received shutdown request...