/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-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:33:45,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:33:45,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:33:45,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:33:45,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:33:45,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:33:45,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:33:45,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:33:45,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:33:45,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:33:45,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:33:45,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:33:45,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:33:45,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:33:45,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:33:45,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:33:45,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:33:45,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:33:45,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:33:45,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:33:45,755 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 12:33:45,773 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:33:45,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:33:45,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:33:45,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:33:45,774 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:33:45,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:33:45,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:33:45,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:33:45,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:33:45,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:33:45,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:33:45,777 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:33:45,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:33:45,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:33:45,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:33:45,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:33:46,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:33:46,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:33:46,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:33:46,043 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:33:46,043 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:33:46,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2021-05-02 12:33:46,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20cce96/ed1ffdb10d1147c4a4d1e1e35dec2db5/FLAGb4c29f3da [2021-05-02 12:33:46,450 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:33:46,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2021-05-02 12:33:46,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20cce96/ed1ffdb10d1147c4a4d1e1e35dec2db5/FLAGb4c29f3da [2021-05-02 12:33:46,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a20cce96/ed1ffdb10d1147c4a4d1e1e35dec2db5 [2021-05-02 12:33:46,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:33:46,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:33:46,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:46,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:33:46,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:33:46,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:46" (1/1) ... [2021-05-02 12:33:46,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74372eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:46, skipping insertion in model container [2021-05-02 12:33:46,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:46" (1/1) ... [2021-05-02 12:33:46,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:33:46,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:33:46,986 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-lit/cggmp2005.i[895,908] [2021-05-02 12:33:46,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:46,999 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:33:47,007 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-lit/cggmp2005.i[895,908] [2021-05-02 12:33:47,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:47,037 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:33:47,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47 WrapperNode [2021-05-02 12:33:47,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:47,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:33:47,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:33:47,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:33:47,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (1/1) ... [2021-05-02 12:33:47,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:33:47,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:33:47,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:33:47,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:33:47,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (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 12:33:47,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:33:47,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:33:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:33:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:33:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:33:47,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:33:47,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:33:47,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:33:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:33:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:33:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:33:47,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:33:47,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:33:47,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:33:47,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:33:47,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:33:47,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:33:47,275 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:33:47,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:47 BoogieIcfgContainer [2021-05-02 12:33:47,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:33:47,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:33:47,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:33:47,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:33:47,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:33:46" (1/3) ... [2021-05-02 12:33:47,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db386a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:47, skipping insertion in model container [2021-05-02 12:33:47,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:47" (2/3) ... [2021-05-02 12:33:47,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db386a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:47, skipping insertion in model container [2021-05-02 12:33:47,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:47" (3/3) ... [2021-05-02 12:33:47,281 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2021-05-02 12:33:47,301 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:33:47,304 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:33:47,315 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:33:47,346 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:33:47,346 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:33:47,346 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:33:47,346 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:33:47,346 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:33:47,346 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:33:47,346 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:33:47,346 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:33:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 12:33:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:33:47,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:47,359 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:47,359 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:47,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1817730928, now seen corresponding path program 1 times [2021-05-02 12:33:47,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:47,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627326105] [2021-05-02 12:33:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:47,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:47,583 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 12:33:47,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:47,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627326105] [2021-05-02 12:33:47,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627326105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:47,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:47,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:33:47,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61036366] [2021-05-02 12:33:47,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:33:47,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:33:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:33:47,598 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 12:33:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:47,684 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 12:33:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:33:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2021-05-02 12:33:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:47,690 INFO L225 Difference]: With dead ends: 32 [2021-05-02 12:33:47,690 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 12:33:47,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:33:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 12:33:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 12:33:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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 12:33:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 12:33:47,722 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 12:33:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:47,722 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 12:33:47,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 12:33:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 12:33:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:33:47,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:47,723 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:47,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:33:47,724 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -480588846, now seen corresponding path program 1 times [2021-05-02 12:33:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161598725] [2021-05-02 12:33:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:47,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:47,812 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 12:33:47,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:47,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161598725] [2021-05-02 12:33:47,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161598725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:47,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101313574] [2021-05-02 12:33:47,813 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 12:33:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:33:47,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:47,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:47,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:47,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:47,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:47,993 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 12:33:47,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101313574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:47,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:47,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-02 12:33:47,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801495719] [2021-05-02 12:33:47,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:33:47,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:47,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:33:47,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:33:47,996 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:48,064 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 12:33:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:33:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:33:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:48,065 INFO L225 Difference]: With dead ends: 19 [2021-05-02 12:33:48,065 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:33:48,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:33:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:33:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:33:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 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 12:33:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 12:33:48,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 12:33:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:48,076 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 12:33:48,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 12:33:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:33:48,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:48,082 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:48,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:33:48,289 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1978857264, now seen corresponding path program 2 times [2021-05-02 12:33:48,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:48,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897430641] [2021-05-02 12:33:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:48,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:48,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897430641] [2021-05-02 12:33:48,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897430641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:48,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076114106] [2021-05-02 12:33:48,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:48,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:33:48,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:48,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:33:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:48,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:48,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076114106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:48,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:48,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-02 12:33:48,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445578756] [2021-05-02 12:33:48,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:33:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:33:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:33:48,508 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:48,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:48,587 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 12:33:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:33:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:33:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:48,589 INFO L225 Difference]: With dead ends: 20 [2021-05-02 12:33:48,589 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 12:33:48,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:33:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 12:33:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 12:33:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 12:33:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:33:48,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 12:33:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:48,596 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:33:48,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:33:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:33:48,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:48,596 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:48,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:48,815 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1180537966, now seen corresponding path program 3 times [2021-05-02 12:33:48,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:48,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941026101] [2021-05-02 12:33:48,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:48,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:48,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941026101] [2021-05-02 12:33:48,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941026101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:48,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351696996] [2021-05-02 12:33:48,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 12:33:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:33:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:48,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:48,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351696996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:49,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:49,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-05-02 12:33:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190138331] [2021-05-02 12:33:49,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:33:49,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:33:49,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:33:49,020 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:49,124 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 12:33:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:33:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 12:33:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:49,125 INFO L225 Difference]: With dead ends: 21 [2021-05-02 12:33:49,125 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:33:49,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:33:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:33:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 12:33:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 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 12:33:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 12:33:49,132 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 12:33:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:49,132 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 12:33:49,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 12:33:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:33:49,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:49,133 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:49,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:49,349 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:49,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:49,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2092523792, now seen corresponding path program 4 times [2021-05-02 12:33:49,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:49,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869794407] [2021-05-02 12:33:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:49,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:49,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869794407] [2021-05-02 12:33:49,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869794407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:49,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178753743] [2021-05-02 12:33:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:49,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:33:49,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:33:49,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:49,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:49,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:49,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:49,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178753743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:49,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:49,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-02 12:33:49,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500304543] [2021-05-02 12:33:49,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:33:49,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:33:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:33:49,584 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:49,799 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 12:33:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:33:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 12:33:49,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:49,800 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:33:49,800 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 12:33:49,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:33:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 12:33:49,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 12:33:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 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 12:33:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 12:33:49,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-02 12:33:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:49,803 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 12:33:49,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:33:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 12:33:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:33:49,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:49,803 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:50,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:50,017 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 478223186, now seen corresponding path program 5 times [2021-05-02 12:33:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:50,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486445024] [2021-05-02 12:33:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:50,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:50,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486445024] [2021-05-02 12:33:50,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486445024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:50,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678898986] [2021-05-02 12:33:50,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:50,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 12:33:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:33:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:33:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:50,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678898986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:50,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:33:50,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-05-02 12:33:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719705473] [2021-05-02 12:33:50,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:33:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:33:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:50,255 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 12:33:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:50,262 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 12:33:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:33:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 16 [2021-05-02 12:33:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:50,263 INFO L225 Difference]: With dead ends: 17 [2021-05-02 12:33:50,263 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:33:50,263 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:33:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:33:50,263 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 12:33:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:33:50,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-05-02 12:33:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:50,264 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:33:50,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 12:33:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:33:50,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:33:50,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 12:33:50,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:33:50,651 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-05-02 12:33:50,653 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:33:50,653 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:33:50,653 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:33:50,653 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:50,653 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 12:33:50,653 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:33:50,654 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 34) the Hoare annotation is: true [2021-05-02 12:33:50,654 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 31) the Hoare annotation is: (or (and (<= main_~j~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~j~0)) (and (<= 9 main_~i~0) (<= main_~j~0 6) (< 5 main_~j~0)) (and (<= 10 main_~j~0) (= main_~i~0 1) (<= main_~j~0 10)) (and (<= 3 main_~i~0) (<= main_~i~0 3) (<= 9 main_~j~0) (<= main_~j~0 9)) (and (<= main_~j~0 7) (<= 7 main_~j~0) (<= 7 main_~i~0) (<= main_~i~0 7))) [2021-05-02 12:33:50,654 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 31) the Hoare annotation is: (and (<= main_~j~0 6) (< 5 main_~j~0)) [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 34) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 34) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:33:50,654 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:33:50,655 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:33:50,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:33:50 BoogieIcfgContainer [2021-05-02 12:33:50,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:33:50,664 INFO L168 Benchmark]: Toolchain (without parser) took 3793.65 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 159.4 MB in the beginning and 213.8 MB in the end (delta: -54.4 MB). Peak memory consumption was 114.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.49 ms. Allocated memory is still 195.0 MB. Free memory was 159.2 MB in the beginning and 178.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L168 Benchmark]: Boogie Preprocessor took 19.53 ms. Allocated memory is still 195.0 MB. Free memory was 178.7 MB in the beginning and 177.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L168 Benchmark]: RCFGBuilder took 215.98 ms. Allocated memory is still 195.0 MB. Free memory was 177.5 MB in the beginning and 162.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L168 Benchmark]: TraceAbstraction took 3386.91 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 162.4 MB in the beginning and 213.8 MB in the end (delta: -51.4 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:50,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 175.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 166.49 ms. Allocated memory is still 195.0 MB. Free memory was 159.2 MB in the beginning and 178.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.53 ms. Allocated memory is still 195.0 MB. Free memory was 178.7 MB in the beginning and 177.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 215.98 ms. Allocated memory is still 195.0 MB. Free memory was 177.5 MB in the beginning and 162.9 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3386.91 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 162.4 MB in the beginning and 213.8 MB in the end (delta: -51.4 MB). Peak memory consumption was 118.5 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3132.7ms, OverallIterations: 6, TraceHistogramMax: 5, EmptinessCheckTime: 12.9ms, AutomataDifference: 591.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 175.7ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 60 SDtfs, 38 SDslu, 117 SDs, 0 SdLazy, 200 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 135.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 687.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 96 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 30.1ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 203 FormulaSimplificationTreeSizeReductionInter, 140.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 37.4ms SsaConstructionTime, 139.9ms SatisfiabilityAnalysisTime, 985.2ms InterpolantComputationTime, 151 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 516 SizeOfPredicates, 7 NumberOfNonLiveVariables, 417 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 26/70 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: 28]: Loop Invariant Derived loop invariant: ((((((j <= 8 && 5 <= i) && i <= 5) && 8 <= j) || ((9 <= i && j <= 6) && 5 < j)) || ((10 <= j && i == 1) && j <= 10)) || (((3 <= i && i <= 3) && 9 <= j) && j <= 9)) || (((j <= 7 && 7 <= j) && 7 <= i) && i <= 7) RESULT: Ultimate proved your program to be correct! Received shutdown request...