/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:53,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:53,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:53,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:53,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:53,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:53,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:53,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:53,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:53,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:53,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:53,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:53,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:53,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:53,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:53,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:53,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:53,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:53,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:53,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:53,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:53,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:53,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:53,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:53,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:53,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:53,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:53,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:53,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:43:53,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:53,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:53,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:53,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:53,990 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:53,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:53,990 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:53,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:53,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:53,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:53,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:53,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:53,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:53,993 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:53,993 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:53,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:53,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:53,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:53,994 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:53,994 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:53,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:53,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:53,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:53,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:53,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:53,996 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:53,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:53,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:53,996 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:53,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:54,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:54,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:54,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:54,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:54,489 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:54,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 18:43:54,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06744ea3/9fbccf7454394d469db85eb4d44570a6/FLAGe78c3023d [2020-10-23 18:43:55,276 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:55,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 18:43:55,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06744ea3/9fbccf7454394d469db85eb4d44570a6/FLAGe78c3023d [2020-10-23 18:43:55,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f06744ea3/9fbccf7454394d469db85eb4d44570a6 [2020-10-23 18:43:55,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:55,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:55,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:55,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:55,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:55,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83e6912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55, skipping insertion in model container [2020-10-23 18:43:55,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:55,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:55,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:55,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:55,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:55,949 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:55,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55 WrapperNode [2020-10-23 18:43:55,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:55,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:55,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:55,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:55,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:55,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... [2020-10-23 18:43:56,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:56,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:56,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:56,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:56,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:43:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:43:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:43:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:56,986 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:56,987 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:43:56,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:56 BoogieIcfgContainer [2020-10-23 18:43:56,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:56,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:56,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:56,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:56,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:55" (1/3) ... [2020-10-23 18:43:56,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621373e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:56, skipping insertion in model container [2020-10-23 18:43:56,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:55" (2/3) ... [2020-10-23 18:43:56,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621373e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:56, skipping insertion in model container [2020-10-23 18:43:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:56" (3/3) ... [2020-10-23 18:43:56,999 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-escape-absolute.i.v+cfa-reducer.c [2020-10-23 18:43:57,011 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:57,017 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:57,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:57,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:57,059 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:57,059 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:57,059 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:57,059 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:57,059 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:57,059 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:57,060 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:57,080 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-10-23 18:43:57,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:43:57,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 759277978, now seen corresponding path program 1 times [2020-10-23 18:43:57,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354050006] [2020-10-23 18:43:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354050006] [2020-10-23 18:43:57,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:57,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:57,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929050940] [2020-10-23 18:43:57,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:57,455 INFO L87 Difference]: Start difference. First operand 91 states. Second operand 4 states. [2020-10-23 18:43:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:57,862 INFO L93 Difference]: Finished difference Result 99 states and 152 transitions. [2020-10-23 18:43:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:57,865 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 18:43:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:57,877 INFO L225 Difference]: With dead ends: 99 [2020-10-23 18:43:57,878 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:43:57,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:43:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:43:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:43:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-10-23 18:43:57,949 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 20 [2020-10-23 18:43:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:57,949 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-10-23 18:43:57,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-10-23 18:43:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:43:57,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:57,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:57,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:57,952 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2062719644, now seen corresponding path program 1 times [2020-10-23 18:43:57,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:57,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436058862] [2020-10-23 18:43:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436058862] [2020-10-23 18:43:58,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:43:58,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345547779] [2020-10-23 18:43:58,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:58,183 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 7 states. [2020-10-23 18:43:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:58,779 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-10-23 18:43:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:43:58,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-23 18:43:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:58,782 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:43:58,782 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 18:43:58,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 18:43:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-23 18:43:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 18:43:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2020-10-23 18:43:58,802 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 21 [2020-10-23 18:43:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:58,802 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2020-10-23 18:43:58,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:43:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2020-10-23 18:43:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:43:58,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:58,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:58,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:58,804 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2003234496, now seen corresponding path program 1 times [2020-10-23 18:43:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:58,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821471589] [2020-10-23 18:43:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:58,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821471589] [2020-10-23 18:43:58,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:58,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:43:58,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248057765] [2020-10-23 18:43:58,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:43:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:43:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:58,976 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand 5 states. [2020-10-23 18:43:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:59,517 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2020-10-23 18:43:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:59,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-23 18:43:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:59,520 INFO L225 Difference]: With dead ends: 83 [2020-10-23 18:43:59,520 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 18:43:59,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 18:43:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2020-10-23 18:43:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:43:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-10-23 18:43:59,539 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 23 [2020-10-23 18:43:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:59,540 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-10-23 18:43:59,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:43:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-10-23 18:43:59,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:43:59,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:59,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:59,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:59,542 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1970777731, now seen corresponding path program 1 times [2020-10-23 18:43:59,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:59,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933067482] [2020-10-23 18:43:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:59,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933067482] [2020-10-23 18:43:59,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:59,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:59,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687804817] [2020-10-23 18:43:59,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:59,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:59,718 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 6 states. [2020-10-23 18:44:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:00,047 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-10-23 18:44:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:00,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-23 18:44:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:00,049 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:44:00,049 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:44:00,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:44:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:44:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:44:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-23 18:44:00,065 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 24 [2020-10-23 18:44:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:00,065 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-23 18:44:00,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-23 18:44:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:44:00,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:00,067 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:00,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 18:44:00,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:00,068 INFO L82 PathProgramCache]: Analyzing trace with hash 718858190, now seen corresponding path program 1 times [2020-10-23 18:44:00,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:00,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504297259] [2020-10-23 18:44:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:00,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504297259] [2020-10-23 18:44:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:00,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339033383] [2020-10-23 18:44:00,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:00,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:00,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:00,248 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 6 states. [2020-10-23 18:44:00,611 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-23 18:44:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:01,121 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2020-10-23 18:44:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:01,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 18:44:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:01,124 INFO L225 Difference]: With dead ends: 113 [2020-10-23 18:44:01,126 INFO L226 Difference]: Without dead ends: 110 [2020-10-23 18:44:01,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-23 18:44:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2020-10-23 18:44:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:44:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2020-10-23 18:44:01,158 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 27 [2020-10-23 18:44:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:01,159 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2020-10-23 18:44:01,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2020-10-23 18:44:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:44:01,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:01,161 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:01,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:44:01,161 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash 834608935, now seen corresponding path program 1 times [2020-10-23 18:44:01,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:01,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851107390] [2020-10-23 18:44:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:01,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851107390] [2020-10-23 18:44:01,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:01,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:01,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544953393] [2020-10-23 18:44:01,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:01,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:01,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:01,298 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand 6 states. [2020-10-23 18:44:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:01,958 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2020-10-23 18:44:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:01,960 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-23 18:44:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:01,961 INFO L225 Difference]: With dead ends: 90 [2020-10-23 18:44:01,961 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 18:44:01,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 18:44:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2020-10-23 18:44:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 18:44:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-10-23 18:44:01,980 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 27 [2020-10-23 18:44:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:01,980 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-10-23 18:44:01,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-10-23 18:44:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:44:01,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:01,982 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:01,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:44:01,982 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 809816762, now seen corresponding path program 1 times [2020-10-23 18:44:01,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363624807] [2020-10-23 18:44:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:02,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363624807] [2020-10-23 18:44:02,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:02,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600409372] [2020-10-23 18:44:02,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:02,083 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 6 states. [2020-10-23 18:44:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:02,618 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2020-10-23 18:44:02,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:02,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-23 18:44:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:02,620 INFO L225 Difference]: With dead ends: 100 [2020-10-23 18:44:02,620 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 18:44:02,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 18:44:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2020-10-23 18:44:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 18:44:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2020-10-23 18:44:02,653 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 28 [2020-10-23 18:44:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:02,656 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2020-10-23 18:44:02,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2020-10-23 18:44:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:44:02,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:02,659 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:02,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 18:44:02,659 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash 103039171, now seen corresponding path program 1 times [2020-10-23 18:44:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901514235] [2020-10-23 18:44:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:02,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901514235] [2020-10-23 18:44:02,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:02,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:02,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940870630] [2020-10-23 18:44:02,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:02,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:02,798 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand 6 states. [2020-10-23 18:44:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:03,240 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-23 18:44:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:03,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-23 18:44:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:03,245 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:44:03,245 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:44:03,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:44:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:44:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:44:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-10-23 18:44:03,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 28 [2020-10-23 18:44:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:03,286 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-10-23 18:44:03,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-10-23 18:44:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:44:03,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:03,289 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:03,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:44:03,290 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash 235435143, now seen corresponding path program 1 times [2020-10-23 18:44:03,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:03,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391008617] [2020-10-23 18:44:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391008617] [2020-10-23 18:44:03,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:03,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:44:03,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990275570] [2020-10-23 18:44:03,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:44:03,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:03,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:44:03,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:44:03,412 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 4 states. [2020-10-23 18:44:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:03,631 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2020-10-23 18:44:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:44:03,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-23 18:44:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:03,632 INFO L225 Difference]: With dead ends: 97 [2020-10-23 18:44:03,633 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:44:03,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:44:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:44:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:44:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:44:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-10-23 18:44:03,666 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 30 [2020-10-23 18:44:03,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:03,666 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-10-23 18:44:03,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:44:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-10-23 18:44:03,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:44:03,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:03,670 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:03,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 18:44:03,671 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash -456282646, now seen corresponding path program 1 times [2020-10-23 18:44:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:03,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937848101] [2020-10-23 18:44:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:03,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937848101] [2020-10-23 18:44:03,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:03,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:03,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824560226] [2020-10-23 18:44:03,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:03,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:03,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:03,833 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 6 states. [2020-10-23 18:44:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:04,176 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-23 18:44:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:04,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-23 18:44:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:04,178 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:44:04,179 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:44:04,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:44:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-23 18:44:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-23 18:44:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-10-23 18:44:04,208 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 31 [2020-10-23 18:44:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:04,208 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-10-23 18:44:04,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-10-23 18:44:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:44:04,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:04,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:04,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:44:04,211 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:04,212 INFO L82 PathProgramCache]: Analyzing trace with hash 349302613, now seen corresponding path program 1 times [2020-10-23 18:44:04,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:04,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49561602] [2020-10-23 18:44:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:04,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49561602] [2020-10-23 18:44:04,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4259586] [2020-10-23 18:44:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:04,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:44:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:04,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:04,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:04,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:04,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:44:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193013181] [2020-10-23 18:44:04,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:04,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:04,563 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 7 states. [2020-10-23 18:44:04,962 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-10-23 18:44:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:05,190 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2020-10-23 18:44:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:05,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-23 18:44:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:05,192 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:44:05,192 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:44:05,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:44:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2020-10-23 18:44:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:44:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2020-10-23 18:44:05,214 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 31 [2020-10-23 18:44:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:05,215 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2020-10-23 18:44:05,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2020-10-23 18:44:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:44:05,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:05,220 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:05,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:44:05,436 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1259880598, now seen corresponding path program 1 times [2020-10-23 18:44:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:05,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488951702] [2020-10-23 18:44:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:05,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:05,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488951702] [2020-10-23 18:44:05,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:05,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:05,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293856423] [2020-10-23 18:44:05,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:05,594 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 6 states. [2020-10-23 18:44:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:05,877 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-23 18:44:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:05,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-23 18:44:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:05,879 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:44:05,879 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:44:05,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:05,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:44:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-23 18:44:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 18:44:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-23 18:44:05,903 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 32 [2020-10-23 18:44:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:05,904 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-23 18:44:05,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-23 18:44:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 18:44:05,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:05,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:05,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 18:44:05,908 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2131493373, now seen corresponding path program 1 times [2020-10-23 18:44:05,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:05,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795053195] [2020-10-23 18:44:05,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:06,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795053195] [2020-10-23 18:44:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492729785] [2020-10-23 18:44:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:44:06,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:06,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:06,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 18:44:06,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:06,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:44:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044791419] [2020-10-23 18:44:06,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:06,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:06,208 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 7 states. [2020-10-23 18:44:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:06,586 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-23 18:44:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:06,587 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-23 18:44:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:06,588 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:44:06,588 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:44:06,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:44:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2020-10-23 18:44:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:44:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-23 18:44:06,613 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 32 [2020-10-23 18:44:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:06,616 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-23 18:44:06,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-23 18:44:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 18:44:06,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:06,617 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:06,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:44:06,818 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash 598948849, now seen corresponding path program 1 times [2020-10-23 18:44:06,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:06,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928125070] [2020-10-23 18:44:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:06,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:06,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928125070] [2020-10-23 18:44:06,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:06,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446395571] [2020-10-23 18:44:06,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:06,954 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 6 states. [2020-10-23 18:44:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:07,273 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-10-23 18:44:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:07,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-23 18:44:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:07,274 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:44:07,275 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:44:07,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:44:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:44:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-23 18:44:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:44:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-10-23 18:44:07,286 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 35 [2020-10-23 18:44:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:07,286 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-10-23 18:44:07,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-10-23 18:44:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:44:07,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:07,289 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:07,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 18:44:07,289 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1387540175, now seen corresponding path program 1 times [2020-10-23 18:44:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:07,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519223588] [2020-10-23 18:44:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:07,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519223588] [2020-10-23 18:44:07,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:07,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:07,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666231920] [2020-10-23 18:44:07,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:07,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:07,439 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 7 states. [2020-10-23 18:44:07,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:07,814 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-23 18:44:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:07,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-23 18:44:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:07,816 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:44:07,816 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:44:07,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:44:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-23 18:44:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 18:44:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-23 18:44:07,830 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 36 [2020-10-23 18:44:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:07,831 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-23 18:44:07,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-23 18:44:07,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:44:07,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:07,832 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:07,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 18:44:07,833 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1441178071, now seen corresponding path program 1 times [2020-10-23 18:44:07,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:07,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136612314] [2020-10-23 18:44:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:07,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136612314] [2020-10-23 18:44:07,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:07,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84315730] [2020-10-23 18:44:07,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:07,966 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 6 states. [2020-10-23 18:44:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:08,492 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-10-23 18:44:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:08,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-23 18:44:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:08,494 INFO L225 Difference]: With dead ends: 83 [2020-10-23 18:44:08,494 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 18:44:08,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 18:44:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-23 18:44:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:44:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-23 18:44:08,505 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2020-10-23 18:44:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:08,505 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-23 18:44:08,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-23 18:44:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:44:08,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:08,506 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:08,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 18:44:08,507 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:08,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:08,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1726856820, now seen corresponding path program 1 times [2020-10-23 18:44:08,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:08,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305568546] [2020-10-23 18:44:08,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:08,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305568546] [2020-10-23 18:44:08,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:08,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:08,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449389920] [2020-10-23 18:44:08,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:08,596 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2020-10-23 18:44:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:08,978 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-23 18:44:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:08,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-10-23 18:44:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:08,979 INFO L225 Difference]: With dead ends: 59 [2020-10-23 18:44:08,979 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:44:08,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:44:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:44:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:44:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-23 18:44:08,994 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 40 [2020-10-23 18:44:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:08,995 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-23 18:44:08,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-23 18:44:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:44:08,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:08,997 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:08,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 18:44:08,997 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:08,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1652370872, now seen corresponding path program 1 times [2020-10-23 18:44:08,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:08,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333372854] [2020-10-23 18:44:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:09,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333372854] [2020-10-23 18:44:09,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:09,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 18:44:09,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372958120] [2020-10-23 18:44:09,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:44:09,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:44:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:44:09,099 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 5 states. [2020-10-23 18:44:09,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:09,356 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2020-10-23 18:44:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:09,356 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-23 18:44:09,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:09,357 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:44:09,357 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:44:09,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:44:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:44:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-23 18:44:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:44:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-23 18:44:09,369 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 42 [2020-10-23 18:44:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:09,369 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-23 18:44:09,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:44:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-23 18:44:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:44:09,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:09,370 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:09,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 18:44:09,370 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -316090246, now seen corresponding path program 1 times [2020-10-23 18:44:09,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:09,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199246202] [2020-10-23 18:44:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:09,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199246202] [2020-10-23 18:44:09,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:09,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:09,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784921160] [2020-10-23 18:44:09,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:09,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:09,465 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 6 states. [2020-10-23 18:44:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:09,779 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-23 18:44:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:09,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-23 18:44:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:09,781 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:44:09,781 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:44:09,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:44:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-10-23 18:44:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 18:44:09,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-23 18:44:09,791 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-23 18:44:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:09,792 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-23 18:44:09,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-23 18:44:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 18:44:09,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:09,793 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:09,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 18:44:09,793 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1208838854, now seen corresponding path program 1 times [2020-10-23 18:44:09,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:09,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918161226] [2020-10-23 18:44:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:09,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918161226] [2020-10-23 18:44:09,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:09,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:09,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735196627] [2020-10-23 18:44:09,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:09,925 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 6 states. [2020-10-23 18:44:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:10,500 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-10-23 18:44:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:10,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-23 18:44:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:10,502 INFO L225 Difference]: With dead ends: 86 [2020-10-23 18:44:10,502 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 18:44:10,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 18:44:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-10-23 18:44:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:44:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-23 18:44:10,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 44 [2020-10-23 18:44:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:10,514 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-23 18:44:10,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-23 18:44:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:44:10,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:10,515 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 18:44:10,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 18:44:10,515 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1180729276, now seen corresponding path program 1 times [2020-10-23 18:44:10,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012124608] [2020-10-23 18:44:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:10,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012124608] [2020-10-23 18:44:10,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:10,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:10,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249350300] [2020-10-23 18:44:10,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:10,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:10,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:10,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:10,634 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 6 states. [2020-10-23 18:44:11,010 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-23 18:44:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:11,051 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-23 18:44:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:11,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-23 18:44:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:11,053 INFO L225 Difference]: With dead ends: 72 [2020-10-23 18:44:11,053 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 18:44:11,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:44:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 18:44:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2020-10-23 18:44:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 18:44:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-10-23 18:44:11,061 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 45 [2020-10-23 18:44:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:11,061 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-10-23 18:44:11,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-10-23 18:44:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:44:11,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:11,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:11,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 18:44:11,063 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 804890832, now seen corresponding path program 1 times [2020-10-23 18:44:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:11,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806402656] [2020-10-23 18:44:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:11,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806402656] [2020-10-23 18:44:11,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726037506] [2020-10-23 18:44:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:44:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:11,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:11,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:11,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:44:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503614257] [2020-10-23 18:44:11,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:11,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:11,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:11,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:11,349 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 7 states. [2020-10-23 18:44:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:11,655 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-23 18:44:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:44:11,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-23 18:44:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:11,659 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:44:11,659 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 18:44:11,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 18:44:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 18:44:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 18:44:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-23 18:44:11,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 45 [2020-10-23 18:44:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:11,669 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-23 18:44:11,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-23 18:44:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 18:44:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:11,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:11,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-23 18:44:11,886 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash 398066145, now seen corresponding path program 1 times [2020-10-23 18:44:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:11,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242851776] [2020-10-23 18:44:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:11,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:44:11,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242851776] [2020-10-23 18:44:11,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:11,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:44:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120789684] [2020-10-23 18:44:11,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:44:11,980 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 6 states. [2020-10-23 18:44:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:12,585 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-10-23 18:44:12,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:12,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-10-23 18:44:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:12,586 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:44:12,586 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:12,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:12,589 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-10-23 18:44:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:12,589 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:12,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:12,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:12,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 18:44:12,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:12,920 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 147 [2020-10-23 18:44:13,199 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 152 [2020-10-23 18:44:13,359 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2020-10-23 18:44:13,990 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 71 [2020-10-23 18:44:14,598 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2020-10-23 18:44:14,940 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2020-10-23 18:44:15,185 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 33 [2020-10-23 18:44:15,192 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:44:15,192 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:44:15,192 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:44:15,193 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:44:15,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:15,193 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= ~__return_375~0 |old(~__return_375~0)|)) [2020-10-23 18:44:15,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:15,193 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:15,194 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:15,194 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:15,194 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:15,194 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:15,194 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:44:15,194 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:15,194 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 439) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L270 CegarLoopResult]: At program point L374(line 374) the Hoare annotation is: false [2020-10-23 18:44:15,195 INFO L270 CegarLoopResult]: At program point L85(line 85) the Hoare annotation is: false [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L374-1(line 374) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L85-1(line 85) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L270 CegarLoopResult]: At program point L308(line 308) the Hoare annotation is: false [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L308-1(line 308) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L143(lines 143 362) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L234(lines 234 338) no Hoare annotation was computed. [2020-10-23 18:44:15,195 INFO L274 CegarLoopResult]: For program point L135(lines 135 397) no Hoare annotation was computed. [2020-10-23 18:44:15,196 INFO L270 CegarLoopResult]: At program point L226(line 226) the Hoare annotation is: false [2020-10-23 18:44:15,196 INFO L274 CegarLoopResult]: For program point L226-1(line 226) no Hoare annotation was computed. [2020-10-23 18:44:15,196 INFO L274 CegarLoopResult]: For program point L61(lines 61 427) no Hoare annotation was computed. [2020-10-23 18:44:15,196 INFO L270 CegarLoopResult]: At program point L284(line 284) the Hoare annotation is: false [2020-10-23 18:44:15,196 INFO L274 CegarLoopResult]: For program point L284-1(line 284) no Hoare annotation was computed. [2020-10-23 18:44:15,196 INFO L274 CegarLoopResult]: For program point L53(lines 53 433) no Hoare annotation was computed. [2020-10-23 18:44:15,196 INFO L270 CegarLoopResult]: At program point L243(line 243) the Hoare annotation is: false [2020-10-23 18:44:15,196 INFO L274 CegarLoopResult]: For program point L243-1(line 243) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L270 CegarLoopResult]: At program point L177(line 177) the Hoare annotation is: false [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L177-1(line 177) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L111(lines 111 405) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L270 CegarLoopResult]: At program point L392(lines 129 403) the Hoare annotation is: (and (let ((.cse0 (< 0 main_~main__scheme~0)) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (= main_~__VERIFIER_assert__cond~3 1)) (.cse3 (<= 1 main_~main__cp~0)) (.cse4 (not (= main_~__VERIFIER_assert__cond~1 0)))) (or (and .cse0 .cse1 .cse2 (= main_~__VERIFIER_assert__cond~2 1) .cse3 .cse4) (and .cse0 .cse1 (not (= main_~__VERIFIER_assert__cond~2 0)) .cse2 (not (= main_~__VERIFIER_assert__cond~17 0)) .cse3 .cse4 (<= 1 main_~__VERIFIER_assert__cond~16)))) (= |old(~__return_375~0)| ~__return_375~0) (<= (+ main_~main__cp~0 1) main_~main__urilen~0)) [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L194(lines 194 354) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L384(lines 384 393) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L95(lines 95 412) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L274 CegarLoopResult]: For program point L29(lines 29 437) no Hoare annotation was computed. [2020-10-23 18:44:15,197 INFO L270 CegarLoopResult]: At program point L145(line 145) the Hoare annotation is: false [2020-10-23 18:44:15,198 INFO L270 CegarLoopResult]: At program point L401(lines 131 402) the Hoare annotation is: (and (< main_~main__cp~0 main_~main__urilen~0) (= main_~__VERIFIER_assert__cond~3 1) (let ((.cse0 (< 0 main_~main__scheme~0)) (.cse1 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse2 (<= 1 main_~main__cp~0)) (.cse3 (not (= main_~__VERIFIER_assert__cond~1 0)))) (or (and .cse0 .cse1 (not (= main_~__VERIFIER_assert__cond~2 0)) (not (= main_~__VERIFIER_assert__cond~16 0)) .cse2 .cse3) (and .cse0 .cse1 (= main_~__VERIFIER_assert__cond~2 1) .cse2 .cse3))) (= |old(~__return_375~0)| ~__return_375~0)) [2020-10-23 18:44:15,198 INFO L274 CegarLoopResult]: For program point L145-1(line 145) no Hoare annotation was computed. [2020-10-23 18:44:15,198 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 13 439) no Hoare annotation was computed. [2020-10-23 18:44:15,198 INFO L274 CegarLoopResult]: For program point L104(lines 104 411) no Hoare annotation was computed. [2020-10-23 18:44:15,198 INFO L274 CegarLoopResult]: For program point L71(lines 71 416) no Hoare annotation was computed. [2020-10-23 18:44:15,198 INFO L270 CegarLoopResult]: At program point L327(lines 262 328) the Hoare annotation is: (and (= main_~__VERIFIER_assert__cond~10 1) (= |old(~__return_375~0)| ~__return_375~0) (let ((.cse0 (let ((.cse17 (+ main_~main__cp~0 1))) (let ((.cse1 (not (= main_~__VERIFIER_assert__cond~5 0))) (.cse2 (< 0 main_~main__scheme~0)) (.cse3 (not (= main_~main__urilen~0 .cse17))) (.cse4 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse5 (not (= main_~__VERIFIER_assert__cond~2 0))) (.cse6 (not (= main_~__VERIFIER_assert__cond~11 0))) (.cse7 (not (= main_~__VERIFIER_assert__cond~9 0))) (.cse8 (= main_~__VERIFIER_assert__cond~3 1)) (.cse9 (<= 1 main_~__VERIFIER_assert__cond~4)) (.cse10 (not (= main_~__VERIFIER_assert__cond~8 0))) (.cse11 (<= .cse17 main_~main__urilen~0)) (.cse12 (= main_~__VERIFIER_assert__cond~9 1)) (.cse13 (not (= main_~__VERIFIER_assert__cond~6 0))) (.cse14 (not (= main_~__VERIFIER_assert__cond~7 0))) (.cse15 (<= 1 main_~main__cp~0)) (.cse16 (not (= main_~__VERIFIER_assert__cond~1 0)))) (or (and .cse1 .cse2 (<= (+ main_~main__c~0 2) main_~main__tokenlen~0) .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (not (= main_~__VERIFIER_assert__cond~12 0)) .cse16)))))) (or (and (= main_~main__c~0 0) .cse0) (and (not (= main_~__VERIFIER_assert__cond~13 0)) (<= 1 main_~main__c~0) .cse0)))) [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L294(lines 294 318) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L162(lines 162 359) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L63(lines 63 422) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 13 439) the Hoare annotation is: (= |old(~__return_375~0)| ~__return_375~0) [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L253(lines 253 329) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L187(lines 187 355) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L270 CegarLoopResult]: At program point L410(lines 104 411) the Hoare annotation is: (and (not (= main_~__VERIFIER_assert__cond~0 0)) (= |old(~__return_375~0)| ~__return_375~0)) [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L212(lines 212 346) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L270 CegarLoopResult]: At program point L113(line 113) the Hoare annotation is: false [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L113-1(line 113) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L47(lines 47 434) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L270(lines 270 322) no Hoare annotation was computed. [2020-10-23 18:44:15,199 INFO L274 CegarLoopResult]: For program point L204(lines 204 353) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L262(lines 262 328) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L270 CegarLoopResult]: At program point L386(line 386) the Hoare annotation is: false [2020-10-23 18:44:15,200 INFO L270 CegarLoopResult]: At program point L97(line 97) the Hoare annotation is: false [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L386-1(line 386) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L97-1(line 97) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L155(lines 155 360) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L23(lines 23 438) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L270 CegarLoopResult]: At program point L296(line 296) the Hoare annotation is: false [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L296-1(line 296) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L65(lines 65 417) no Hoare annotation was computed. [2020-10-23 18:44:15,200 INFO L270 CegarLoopResult]: At program point L255(line 255) the Hoare annotation is: false [2020-10-23 18:44:15,200 INFO L274 CegarLoopResult]: For program point L255-1(line 255) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L270 CegarLoopResult]: At program point L189(line 189) the Hoare annotation is: false [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L189-1(line 189) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L123(lines 123 403) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L270 CegarLoopResult]: At program point L214(line 214) the Hoare annotation is: false [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L214-1(line 214) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L270 CegarLoopResult]: At program point L272(line 272) the Hoare annotation is: false [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L272-1(line 272) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L41(lines 41 435) no Hoare annotation was computed. [2020-10-23 18:44:15,201 INFO L270 CegarLoopResult]: At program point L157(line 157) the Hoare annotation is: false [2020-10-23 18:44:15,201 INFO L274 CegarLoopResult]: For program point L157-1(line 157) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L372(lines 372 395) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L83(lines 83 414) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L306(lines 306 316) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L224(lines 224 344) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L270 CegarLoopResult]: At program point L125(line 125) the Hoare annotation is: false [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L125-1(line 125) no Hoare annotation was computed. [2020-10-23 18:44:15,202 INFO L274 CegarLoopResult]: For program point L59(lines 59 432) no Hoare annotation was computed. [2020-10-23 18:44:15,203 INFO L270 CegarLoopResult]: At program point L315(lines 230 344) the Hoare annotation is: (let ((.cse17 (+ main_~main__cp~0 1))) (let ((.cse2 (not (= main_~__VERIFIER_assert__cond~5 0))) (.cse3 (< 0 main_~main__scheme~0)) (.cse4 (not (= main_~__VERIFIER_assert__cond~0 0))) (.cse5 (not (= main_~__VERIFIER_assert__cond~2 0))) (.cse7 (= main_~__VERIFIER_assert__cond~3 1)) (.cse1 (= main_~main__c~0 0)) (.cse8 (= |old(~__return_375~0)| ~__return_375~0)) (.cse9 (<= 1 main_~__VERIFIER_assert__cond~4)) (.cse10 (not (= main_~__VERIFIER_assert__cond~8 0))) (.cse11 (<= .cse17 main_~main__urilen~0)) (.cse12 (= main_~__VERIFIER_assert__cond~9 1)) (.cse13 (not (= main_~__VERIFIER_assert__cond~6 0))) (.cse14 (not (= main_~__VERIFIER_assert__cond~7 0))) (.cse15 (<= 1 main_~main__cp~0)) (.cse16 (not (= main_~__VERIFIER_assert__cond~1 0)))) (or (and (let ((.cse0 (let ((.cse6 (not (= main_~__VERIFIER_assert__cond~11 0)))) (or (and .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (not (= main_~__VERIFIER_assert__cond~12 0)) .cse16) (and .cse2 .cse3 (<= (+ main_~main__c~0 2) main_~main__tokenlen~0) .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16))))) (or (and .cse0 (not (= main_~__VERIFIER_assert__cond~13 0)) (<= 1 main_~main__c~0)) (and .cse0 .cse1))) (<= 1 main_~__VERIFIER_assert__cond~10)) (and (< .cse17 main_~main__urilen~0) .cse2 .cse3 .cse4 .cse5 .cse7 .cse1 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 (= main_~__VERIFIER_assert__cond~8 1) .cse16)))) [2020-10-23 18:44:15,203 INFO L274 CegarLoopResult]: For program point L282(lines 282 320) no Hoare annotation was computed. [2020-10-23 18:44:15,203 INFO L274 CegarLoopResult]: For program point L241(lines 241 331) no Hoare annotation was computed. [2020-10-23 18:44:15,203 INFO L274 CegarLoopResult]: For program point L175(lines 175 357) no Hoare annotation was computed. [2020-10-23 18:44:15,203 INFO L274 CegarLoopResult]: For program point L35(lines 35 436) no Hoare annotation was computed. [2020-10-23 18:44:15,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:15 BoogieIcfgContainer [2020-10-23 18:44:15,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:15,271 INFO L168 Benchmark]: Toolchain (without parser) took 19672.68 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 127.0 MB in the beginning and 190.1 MB in the end (delta: -63.1 MB). Peak memory consumption was 184.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:15,271 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:15,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 114.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:15,272 INFO L168 Benchmark]: Boogie Preprocessor took 104.04 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 112.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:15,273 INFO L168 Benchmark]: RCFGBuilder took 930.83 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 116.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:15,278 INFO L168 Benchmark]: TraceAbstraction took 18276.63 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 115.6 MB in the beginning and 190.1 MB in the end (delta: -74.5 MB). Peak memory consumption was 173.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:15,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 114.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 104.04 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 112.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 930.83 ms. Allocated memory is still 151.0 MB. Free memory was 112.4 MB in the beginning and 116.2 MB in the end (delta: -3.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18276.63 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 115.6 MB in the beginning and 190.1 MB in the end (delta: -74.5 MB). Peak memory consumption was 173.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 230]: Loop Invariant Derived loop invariant: ((((((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && \old(__return_375) == __return_375) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) || (((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && main__c + 2 <= main__tokenlen) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && \old(__return_375) == __return_375) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0))) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__c) || (((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && \old(__return_375) == __return_375) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) || (((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && main__c + 2 <= main__tokenlen) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && \old(__return_375) == __return_375) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0))) && main__c == 0)) && 1 <= __VERIFIER_assert__cond) || ((((((((((((((((main__cp + 1 < main__urilen && !(__VERIFIER_assert__cond == 0)) && 0 < main__scheme) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && main__c == 0) && \old(__return_375) == __return_375) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) - InvariantResult [Line: 131]: Loop Invariant Derived loop invariant: ((main__cp < main__urilen && __VERIFIER_assert__cond == 1) && ((((((0 < main__scheme && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) || ((((0 < main__scheme && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)))) && \old(__return_375) == __return_375 - InvariantResult [Line: 262]: Loop Invariant Derived loop invariant: (__VERIFIER_assert__cond == 1 && \old(__return_375) == __return_375) && ((main__c == 0 && (((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && main__c + 2 <= main__tokenlen) && !(main__urilen == main__cp + 1)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) || ((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && !(main__urilen == main__cp + 1)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)))) || ((!(__VERIFIER_assert__cond == 0) && 1 <= main__c) && (((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && main__c + 2 <= main__tokenlen) && !(main__urilen == main__cp + 1)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) || ((((((((((((((((!(__VERIFIER_assert__cond == 0) && 0 < main__scheme) && !(main__urilen == main__cp + 1)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && 1 <= __VERIFIER_assert__cond) && !(__VERIFIER_assert__cond == 0)) && main__cp + 1 <= main__urilen) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0))))) - InvariantResult [Line: 129]: Loop Invariant Derived loop invariant: (((((((0 < main__scheme && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && __VERIFIER_assert__cond == 1) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) || (((((((0 < main__scheme && !(__VERIFIER_assert__cond == 0)) && !(__VERIFIER_assert__cond == 0)) && __VERIFIER_assert__cond == 1) && !(__VERIFIER_assert__cond == 0)) && 1 <= main__cp) && !(__VERIFIER_assert__cond == 0)) && 1 <= __VERIFIER_assert__cond)) && \old(__return_375) == __return_375) && main__cp + 1 <= main__urilen - InvariantResult [Line: 104]: Loop Invariant Derived loop invariant: !(__VERIFIER_assert__cond == 0) && \old(__return_375) == __return_375 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 23, TraceHistogramMax: 2, AutomataDifference: 10.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1326 SDtfs, 3065 SDslu, 888 SDs, 0 SdLazy, 2471 SolverSat, 426 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 23 MinimizatonAttempts, 237 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 59 PreInvPairs, 67 NumberOfFragments, 798 HoareAnnotationTreeSize, 59 FomulaSimplifications, 818209 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 28 FomulaSimplificationsInter, 229624 FormulaSimplificationTreeSizeReductionInter, 1.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 881 NumberOfCodeBlocks, 881 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 855 ConstructedInterpolants, 0 QuantifiedInterpolants, 89860 SizeOfPredicates, 15 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 26 InterpolantComputations, 20 PerfectInterpolantSequences, 9/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...