/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/recursive-simple/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:15:45,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:15:45,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:15:45,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:15:45,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:15:45,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:15:45,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:15:45,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:15:45,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:15:45,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:15:45,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:15:45,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:15:45,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:15:45,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:15:45,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:15:45,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:15:45,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:15:45,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:15:45,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:15:45,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:15:45,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:15:45,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:15:45,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:15:45,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:15:45,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:15:45,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:15:45,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:15:45,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:15:45,786 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 18:15:45,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:15:45,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:15:45,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:15:45,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:15:45,847 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:15:45,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:15:45,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:15:45,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:15:45,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:15:45,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:15:45,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:15:45,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:15:45,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:15:45,850 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:15:45,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:15:45,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:15:45,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:15:45,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:15:45,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:15:45,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:15:45,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:15:45,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:15:45,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:15:45,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:15:45,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:15:45,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:15:45,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:15:45,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:15:45,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:15:45,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:15:46,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:15:46,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:15:46,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:15:46,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:15:46,309 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:15:46,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-10-23 18:15:46,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffa2fe6a/f75a09518b104c429ef9b38a9c240c0c/FLAG46ea62d63 [2020-10-23 18:15:47,090 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:15:47,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-10-23 18:15:47,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffa2fe6a/f75a09518b104c429ef9b38a9c240c0c/FLAG46ea62d63 [2020-10-23 18:15:47,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fffa2fe6a/f75a09518b104c429ef9b38a9c240c0c [2020-10-23 18:15:47,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:15:47,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:15:47,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:47,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:15:47,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:15:47,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2908bbef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47, skipping insertion in model container [2020-10-23 18:15:47,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:15:47,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:15:47,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:47,851 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:15:47,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:15:47,895 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:15:47,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47 WrapperNode [2020-10-23 18:15:47,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:15:47,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:15:47,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:15:47,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:15:47,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... [2020-10-23 18:15:47,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:15:47,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:15:47,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:15:47,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:15:47,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:15:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:15:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:15:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:15:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:15:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-23 18:15:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:15:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:15:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:15:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:15:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:15:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:15:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:15:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-23 18:15:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:15:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:15:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:15:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:15:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:15:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:15:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:15:48,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:15:48,465 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:15:48,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:48 BoogieIcfgContainer [2020-10-23 18:15:48,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:15:48,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:15:48,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:15:48,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:15:48,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:15:47" (1/3) ... [2020-10-23 18:15:48,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de94227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:48, skipping insertion in model container [2020-10-23 18:15:48,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:15:47" (2/3) ... [2020-10-23 18:15:48,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de94227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:15:48, skipping insertion in model container [2020-10-23 18:15:48,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:15:48" (3/3) ... [2020-10-23 18:15:48,534 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-10-23 18:15:48,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:15:48,613 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:15:48,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:15:48,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:15:48,698 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:15:48,698 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:15:48,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:15:48,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:15:48,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:15:48,698 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:15:48,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:15:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-23 18:15:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:15:48,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:48,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:48,727 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1481297807, now seen corresponding path program 1 times [2020-10-23 18:15:48,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:48,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536509451] [2020-10-23 18:15:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,110 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 18:15:49,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536509451] [2020-10-23 18:15:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:15:49,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088241562] [2020-10-23 18:15:49,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:15:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:49,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:15:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:15:49,138 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-23 18:15:49,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:49,476 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-23 18:15:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:15:49,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:15:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:49,490 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:15:49,490 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:15:49,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:15:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:15:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:15:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:15:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-23 18:15:49,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-10-23 18:15:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:49,553 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-23 18:15:49,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:15:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-23 18:15:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:15:49,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:49,556 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 18:15:49,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:15:49,556 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 262491562, now seen corresponding path program 1 times [2020-10-23 18:15:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:49,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919198182] [2020-10-23 18:15:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:49,788 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 18:15:49,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919198182] [2020-10-23 18:15:49,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:15:49,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:15:49,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515441591] [2020-10-23 18:15:49,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:15:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:15:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:15:49,794 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-23 18:15:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:50,262 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-23 18:15:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:15:50,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-23 18:15:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:50,266 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:15:50,266 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 18:15:50,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:15:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 18:15:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-23 18:15:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:15:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-23 18:15:50,292 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-23 18:15:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:50,292 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-23 18:15:50,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:15:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-23 18:15:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:15:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:50,295 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] [2020-10-23 18:15:50,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:15:50,296 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1067256061, now seen corresponding path program 1 times [2020-10-23 18:15:50,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:50,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645299651] [2020-10-23 18:15:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:50,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645299651] [2020-10-23 18:15:50,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278464999] [2020-10-23 18:15:50,546 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 18:15:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:50,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:15:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:15:50,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:50,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-10-23 18:15:50,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285515195] [2020-10-23 18:15:50,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:15:50,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:50,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:15:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:15:50,772 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 12 states. [2020-10-23 18:15:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:51,387 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-23 18:15:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:15:51,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-23 18:15:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:51,389 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:15:51,390 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:15:51,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:15:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:15:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-23 18:15:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:15:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 18:15:51,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-23 18:15:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:51,402 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 18:15:51,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:15:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 18:15:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:15:51,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:51,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:51,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:15:51,612 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1416908450, now seen corresponding path program 1 times [2020-10-23 18:15:51,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:51,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349370546] [2020-10-23 18:15:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:51,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349370546] [2020-10-23 18:15:51,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278784131] [2020-10-23 18:15:51,868 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 18:15:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:51,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:15:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:15:52,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:52,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-10-23 18:15:52,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187272064] [2020-10-23 18:15:52,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:15:52,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:15:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:15:52,060 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 13 states. [2020-10-23 18:15:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:52,513 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-23 18:15:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:15:52,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-23 18:15:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:52,515 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:15:52,515 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:15:52,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:15:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:15:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-23 18:15:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:15:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-23 18:15:52,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2020-10-23 18:15:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:52,526 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-23 18:15:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:15:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-23 18:15:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:15:52,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:52,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:52,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:52,744 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1482575991, now seen corresponding path program 2 times [2020-10-23 18:15:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:52,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544438024] [2020-10-23 18:15:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:52,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:52,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:52,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:52,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:52,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:15:53,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544438024] [2020-10-23 18:15:53,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343117059] [2020-10-23 18:15:53,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:15:53,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:15:53,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:15:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-23 18:15:53,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:53,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2020-10-23 18:15:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644041262] [2020-10-23 18:15:53,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:15:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:53,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:15:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:15:53,288 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2020-10-23 18:15:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:53,856 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-23 18:15:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:15:53,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2020-10-23 18:15:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:53,859 INFO L225 Difference]: With dead ends: 54 [2020-10-23 18:15:53,860 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:15:53,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:15:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:15:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-23 18:15:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:15:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-23 18:15:53,880 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 39 [2020-10-23 18:15:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:53,880 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-23 18:15:53,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:15:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-23 18:15:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:15:53,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:53,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:54,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:54,100 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash -487565550, now seen corresponding path program 2 times [2020-10-23 18:15:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:54,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890997994] [2020-10-23 18:15:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 18:15:54,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890997994] [2020-10-23 18:15:54,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521904992] [2020-10-23 18:15:54,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:54,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:15:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:15:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-23 18:15:54,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:54,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2020-10-23 18:15:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695670462] [2020-10-23 18:15:54,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:15:54,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:15:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:15:54,677 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-10-23 18:15:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:55,683 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-23 18:15:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:15:55,685 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-23 18:15:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:55,688 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:15:55,688 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 18:15:55,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:15:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 18:15:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2020-10-23 18:15:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:15:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-23 18:15:55,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 45 [2020-10-23 18:15:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:55,705 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-23 18:15:55,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:15:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-23 18:15:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:15:55,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:55,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:55,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:55,921 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash 720493547, now seen corresponding path program 3 times [2020-10-23 18:15:55,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:55,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863263629] [2020-10-23 18:15:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:15:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863263629] [2020-10-23 18:15:56,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519994366] [2020-10-23 18:15:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:56,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:15:56,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:15:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:15:56,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:56,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 16 [2020-10-23 18:15:56,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511428747] [2020-10-23 18:15:56,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:15:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:15:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:15:56,431 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 12 states. [2020-10-23 18:15:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:56,633 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-23 18:15:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:15:56,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-23 18:15:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:56,635 INFO L225 Difference]: With dead ends: 66 [2020-10-23 18:15:56,635 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:15:56,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:15:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:15:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:15:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:15:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:15:56,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 51 [2020-10-23 18:15:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:56,645 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:15:56,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:15:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:15:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:15:56,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:56,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:56,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:15:56,860 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash -803455290, now seen corresponding path program 3 times [2020-10-23 18:15:56,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:56,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989601703] [2020-10-23 18:15:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:56,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:15:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-23 18:15:57,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989601703] [2020-10-23 18:15:57,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946891987] [2020-10-23 18:15:57,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:57,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:15:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:15:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-23 18:15:57,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:15:57,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 17 [2020-10-23 18:15:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367003967] [2020-10-23 18:15:57,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:15:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:15:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:15:57,341 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2020-10-23 18:15:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:57,560 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-23 18:15:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:15:57,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-23 18:15:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:57,565 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:15:57,565 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:15:57,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:15:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:15:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:15:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:15:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:15:57,567 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-10-23 18:15:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:57,568 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:15:57,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:15:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:15:57,570 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:15:57,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:57,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:15:57,893 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:15:57,894 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:15:57,894 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:15:57,894 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:15:57,894 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:57,894 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)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:15:57,894 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-10-23 18:15:57,895 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L274 CegarLoopResult]: For program point id2EXIT(lines 14 17) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L277 CegarLoopResult]: At program point id2ENTRY(lines 14 17) the Hoare annotation is: true [2020-10-23 18:15:57,895 INFO L274 CegarLoopResult]: For program point id2FINAL(lines 14 17) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:57,895 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:15:57,895 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:15:57,896 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:57,896 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 19 25) the Hoare annotation is: true [2020-10-23 18:15:57,896 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 19 25) no Hoare annotation was computed. [2020-10-23 18:15:57,896 INFO L270 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: false [2020-10-23 18:15:57,896 INFO L274 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-10-23 18:15:57,896 INFO L274 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-23 18:15:57,896 INFO L270 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-10-23 18:15:57,896 INFO L274 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L274 CegarLoopResult]: For program point L22-2(lines 19 25) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L274 CegarLoopResult]: For program point idFINAL(lines 9 12) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L270 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-10-23 18:15:57,897 INFO L274 CegarLoopResult]: For program point idEXIT(lines 9 12) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L274 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-10-23 18:15:57,897 INFO L277 CegarLoopResult]: At program point idENTRY(lines 9 12) the Hoare annotation is: true [2020-10-23 18:15:57,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:15:57 BoogieIcfgContainer [2020-10-23 18:15:57,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:15:57,905 INFO L168 Benchmark]: Toolchain (without parser) took 10445.30 ms. Allocated memory was 162.5 MB in the beginning and 255.9 MB in the end (delta: 93.3 MB). Free memory was 137.9 MB in the beginning and 190.6 MB in the end (delta: -52.7 MB). Peak memory consumption was 41.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:57,906 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 162.5 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:15:57,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.33 ms. Allocated memory is still 162.5 MB. Free memory was 137.3 MB in the beginning and 127.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:57,907 INFO L168 Benchmark]: Boogie Preprocessor took 74.71 ms. Allocated memory is still 162.5 MB. Free memory was 127.6 MB in the beginning and 126.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:57,908 INFO L168 Benchmark]: RCFGBuilder took 491.29 ms. Allocated memory is still 162.5 MB. Free memory was 126.3 MB in the beginning and 113.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:57,909 INFO L168 Benchmark]: TraceAbstraction took 9432.96 ms. Allocated memory was 162.5 MB in the beginning and 255.9 MB in the end (delta: 93.3 MB). Free memory was 113.1 MB in the beginning and 190.6 MB in the end (delta: -77.5 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:57,912 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 162.5 MB. Free memory is still 134.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 424.33 ms. Allocated memory is still 162.5 MB. Free memory was 137.3 MB in the beginning and 127.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.71 ms. Allocated memory is still 162.5 MB. Free memory was 127.6 MB in the beginning and 126.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 491.29 ms. Allocated memory is still 162.5 MB. Free memory was 126.3 MB in the beginning and 113.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9432.96 ms. Allocated memory was 162.5 MB in the beginning and 255.9 MB in the end (delta: 93.3 MB). Free memory was 113.1 MB in the beginning and 190.6 MB in the end (delta: -77.5 MB). Peak memory consumption was 17.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.0s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 178 SDtfs, 202 SDslu, 643 SDs, 0 SdLazy, 1213 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 457 GetRequests, 311 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 20 NumberOfFragments, 51 HoareAnnotationTreeSize, 20 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 188 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 540 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 526 ConstructedInterpolants, 0 QuantifiedInterpolants, 63652 SizeOfPredicates, 33 NumberOfNonLiveVariables, 960 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...