/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/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:16:03,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:16:03,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:16:03,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:16:03,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:16:03,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:16:03,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:16:03,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:16:03,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:16:03,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:16:03,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:16:03,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:16:03,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:16:03,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:16:03,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:16:03,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:16:03,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:16:03,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:16:03,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:16:03,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:16:03,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:16:03,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:16:03,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:16:03,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:16:03,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:16:03,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:16:03,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:16:03,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:16:03,754 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 18:16:03,783 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:16:03,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:16:03,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:16:03,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:16:03,786 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:16:03,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:16:03,786 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:16:03,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:16:03,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:16:03,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:16:03,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:16:03,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:16:03,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:16:03,788 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:16:03,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:16:03,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:16:03,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:16:03,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:16:03,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:16:03,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:16:03,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:16:03,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:03,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:16:03,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:16:03,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:16:03,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:16:03,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:16:03,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:16:03,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:16:03,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:16:04,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:16:04,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:16:04,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:16:04,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:16:04,268 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:16:04,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-10-23 18:16:04,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec6a60f9/781d8086c7df4e87a08e0af1d1915d96/FLAG11600128a [2020-10-23 18:16:05,061 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:16:05,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2020-10-23 18:16:05,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec6a60f9/781d8086c7df4e87a08e0af1d1915d96/FLAG11600128a [2020-10-23 18:16:05,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec6a60f9/781d8086c7df4e87a08e0af1d1915d96 [2020-10-23 18:16:05,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:16:05,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:16:05,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:05,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:16:05,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:16:05,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61162730 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05, skipping insertion in model container [2020-10-23 18:16:05,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:16:05,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:16:05,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:05,593 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:16:05,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:05,627 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:16:05,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05 WrapperNode [2020-10-23 18:16:05,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:05,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:16:05,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:16:05,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:16:05,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (1/1) ... [2020-10-23 18:16:05,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:16:05,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:16:05,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:16:05,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:16:05,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (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 18:16:05,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:16:05,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:16:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:16:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:16:05,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:16:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:16:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:16:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:16:05,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:16:05,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:16:05,811 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:16:05,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:16:05,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:16:05,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:16:05,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:16:05,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:16:05,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:16:05,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:16:06,066 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:16:06,067 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:16:06,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:06 BoogieIcfgContainer [2020-10-23 18:16:06,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:16:06,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:16:06,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:16:06,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:16:06,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:16:05" (1/3) ... [2020-10-23 18:16:06,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1f8427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:06, skipping insertion in model container [2020-10-23 18:16:06,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:05" (2/3) ... [2020-10-23 18:16:06,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1f8427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:06, skipping insertion in model container [2020-10-23 18:16:06,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:06" (3/3) ... [2020-10-23 18:16:06,081 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-10-23 18:16:06,095 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:16:06,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:16:06,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:16:06,149 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:16:06,150 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:16:06,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:16:06,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:16:06,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:16:06,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:16:06,151 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:16:06,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:16:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:16:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:16:06,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:06,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:06,182 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:16:06,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:06,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874449881] [2020-10-23 18:16:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:06,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:06,550 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 18:16:06,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874449881] [2020-10-23 18:16:06,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:16:06,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:16:06,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952994961] [2020-10-23 18:16:06,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:16:06,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:16:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:16:06,588 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:16:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:07,003 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 18:16:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:16:07,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:16:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:07,017 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:16:07,018 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:16:07,022 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 18:16:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:16:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:16:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:16:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:16:07,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:16:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:07,076 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:16:07,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:16:07,076 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:16:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:16:07,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:07,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:07,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:16:07,079 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:07,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:07,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:16:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:07,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370566290] [2020-10-23 18:16:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:07,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:07,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:07,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:07,307 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 18:16:07,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370566290] [2020-10-23 18:16:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895098500] [2020-10-23 18:16:07,312 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 18:16:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:16:07,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:07,508 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 18:16:07,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:07,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-10-23 18:16:07,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386639347] [2020-10-23 18:16:07,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:16:07,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:16:07,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:16:07,513 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-10-23 18:16:07,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:07,810 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:16:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:16:07,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-23 18:16:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:07,813 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:16:07,813 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:16:07,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:16:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:16:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:16:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:16:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:16:07,824 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:16:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:07,825 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:16:07,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:16:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:16:07,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:16:07,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:07,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:08,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:16:08,052 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:08,054 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:16:08,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:08,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739893577] [2020-10-23 18:16:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:08,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:08,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:08,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:08,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739893577] [2020-10-23 18:16:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560572705] [2020-10-23 18:16:08,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:08,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:16:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:16:08,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:08,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-10-23 18:16:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342574176] [2020-10-23 18:16:08,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:16:08,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:08,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:16:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:16:08,476 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2020-10-23 18:16:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:08,764 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:16:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:16:08,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-23 18:16:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:08,767 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:16:08,767 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:16:08,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:16:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:16:08,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:16:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:16:08,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:16:08,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:16:08,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:08,776 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:16:08,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:16:08,776 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:16:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:16:08,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:08,778 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:08,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:08,993 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:16:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:08,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452628060] [2020-10-23 18:16:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452628060] [2020-10-23 18:16:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560424841] [2020-10-23 18:16:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:09,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:16:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:16:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:16:09,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:09,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-10-23 18:16:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737033693] [2020-10-23 18:16:09,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:16:09,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:16:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:16:09,328 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-23 18:16:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:09,615 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:16:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:16:09,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-23 18:16:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:09,618 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:16:09,618 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:16:09,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:16:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:16:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:16:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:16:09,627 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:16:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:09,628 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:16:09,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:16:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:16:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:16:09,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:09,630 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:09,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:09,846 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:16:09,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:09,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721916916] [2020-10-23 18:16:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:09,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:10,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:10,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721916916] [2020-10-23 18:16:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903058687] [2020-10-23 18:16:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:10,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:10,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:16:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:16:10,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:10,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-10-23 18:16:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011521015] [2020-10-23 18:16:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:16:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:16:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:16:10,237 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2020-10-23 18:16:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:10,668 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:16:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:10,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-23 18:16:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:10,671 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:16:10,671 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:16:10,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:16:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:16:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:16:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:16:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:16:10,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:16:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:10,681 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:16:10,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:16:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:16:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:16:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:10,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:10,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:10,899 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:10,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:16:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:10,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829260523] [2020-10-23 18:16:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:10,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829260523] [2020-10-23 18:16:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438992021] [2020-10-23 18:16:11,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:11,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:16:11,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:11,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:16:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:16:11,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:11,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2020-10-23 18:16:11,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409864447] [2020-10-23 18:16:11,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:16:11,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:16:11,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:16:11,375 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2020-10-23 18:16:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:11,812 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:16:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:16:11,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-23 18:16:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:11,815 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:16:11,816 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:16:11,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:16:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:16:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:16:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:16:11,824 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:16:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:11,825 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:16:11,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:16:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:16:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:16:11,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:11,827 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:12,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:16:12,042 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:12,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-10-23 18:16:12,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:12,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537655619] [2020-10-23 18:16:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537655619] [2020-10-23 18:16:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941969170] [2020-10-23 18:16:12,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 18:16:12,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:16:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:16:12,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:16:12,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:12,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-10-23 18:16:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489237423] [2020-10-23 18:16:12,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:12,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:12,453 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2020-10-23 18:16:12,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:12,905 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:16:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:12,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-10-23 18:16:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:12,908 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:16:12,909 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:16:12,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:16:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:16:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:16:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:16:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:16:12,918 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:16:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:12,918 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:16:12,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:16:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:16:12,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:12,920 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:13,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:13,134 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-10-23 18:16:13,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:13,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885662349] [2020-10-23 18:16:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:16:13,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885662349] [2020-10-23 18:16:13,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736496152] [2020-10-23 18:16:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:16:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:16:13,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:13,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2020-10-23 18:16:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747534223] [2020-10-23 18:16:13,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:16:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:16:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:16:13,648 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2020-10-23 18:16:14,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:14,128 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:16:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:16:14,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-23 18:16:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:14,132 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:16:14,132 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:16:14,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:16:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:16:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:16:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:16:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:16:14,142 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:16:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:16:14,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:16:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:16:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:16:14,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:14,144 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:14,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:14,358 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-10-23 18:16:14,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:14,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482407294] [2020-10-23 18:16:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:16:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482407294] [2020-10-23 18:16:14,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224608827] [2020-10-23 18:16:14,708 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:14,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:16:14,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:16:14,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:14,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2020-10-23 18:16:14,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542467934] [2020-10-23 18:16:14,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:16:14,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:14,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:16:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:16:14,941 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-23 18:16:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:15,473 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:16:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:16:15,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 63 [2020-10-23 18:16:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:15,478 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:16:15,478 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:16:15,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:16:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:16:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:16:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:16:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:16:15,499 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:16:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:15,503 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:16:15,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:16:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:16:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:16:15,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:15,507 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:15,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:16:15,722 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-10-23 18:16:15,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:15,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360009085] [2020-10-23 18:16:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:16,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:16:16,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360009085] [2020-10-23 18:16:16,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894900018] [2020-10-23 18:16:16,086 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:16,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:16:16,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:16:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:16:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:16,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2020-10-23 18:16:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907254467] [2020-10-23 18:16:16,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:16,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:16,290 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2020-10-23 18:16:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:16,804 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:16:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:16:16,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-23 18:16:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:16,807 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:16:16,807 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:16:16,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:16:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:16:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:16:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:16:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:16:16,816 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:16:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:16,816 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:16:16,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:16:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:16:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:16,818 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:17,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:17,032 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-10-23 18:16:17,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:17,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921474571] [2020-10-23 18:16:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:16:17,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921474571] [2020-10-23 18:16:17,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367216934] [2020-10-23 18:16:17,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:17,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:16:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:16:17,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:17,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2020-10-23 18:16:17,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776229358] [2020-10-23 18:16:17,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:16:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:16:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:17,622 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-10-23 18:16:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:18,160 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:16:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:18,160 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2020-10-23 18:16:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:18,162 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:16:18,162 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:16:18,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:16:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:16:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:16:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:16:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:16:18,185 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:16:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:18,185 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:16:18,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:16:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:16:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:16:18,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:18,189 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:18,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:18,391 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-10-23 18:16:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:18,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599046187] [2020-10-23 18:16:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:16:18,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599046187] [2020-10-23 18:16:18,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511505314] [2020-10-23 18:16:18,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:19,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:16:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:16:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:16:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:19,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 20 [2020-10-23 18:16:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398886871] [2020-10-23 18:16:19,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:16:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:16:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:16:19,174 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2020-10-23 18:16:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:19,799 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:16:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:16:19,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-10-23 18:16:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:19,802 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:16:19,804 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:16:19,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:16:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:16:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:16:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:16:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:16:19,820 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:16:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:19,821 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:16:19,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:16:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:16:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:16:19,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:19,824 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:20,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:16:20,041 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-10-23 18:16:20,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:20,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903006640] [2020-10-23 18:16:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:16:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903006640] [2020-10-23 18:16:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216254920] [2020-10-23 18:16:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:20,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:16:20,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:16:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:16:20,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:20,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 21 [2020-10-23 18:16:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350698438] [2020-10-23 18:16:20,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:16:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:16:20,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:16:20,800 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-10-23 18:16:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:21,517 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:16:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:16:21,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-23 18:16:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:21,519 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:16:21,520 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:16:21,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=390, Invalid=870, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:16:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:16:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:16:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:16:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:16:21,529 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:16:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:21,530 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:16:21,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:16:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:16:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:16:21,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:21,532 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:21,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:16:21,745 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:21,746 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-10-23 18:16:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:21,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791121868] [2020-10-23 18:16:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:21,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:16:22,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791121868] [2020-10-23 18:16:22,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141182228] [2020-10-23 18:16:22,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:16:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:16:22,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:22,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 22 [2020-10-23 18:16:22,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857347541] [2020-10-23 18:16:22,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:16:22,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:16:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:22,499 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2020-10-23 18:16:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:23,262 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:16:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:16:23,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-10-23 18:16:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:23,264 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:16:23,264 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:16:23,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=967, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:16:23,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:16:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:16:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:16:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:16:23,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:16:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:23,285 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:16:23,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:16:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:16:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:16:23,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:23,287 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:23,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:16:23,489 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:23,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-10-23 18:16:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:23,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471500317] [2020-10-23 18:16:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:23,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:24,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:24,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:16:24,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471500317] [2020-10-23 18:16:24,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97535758] [2020-10-23 18:16:24,143 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:24,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:24,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:16:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:16:24,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:24,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 23 [2020-10-23 18:16:24,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080551874] [2020-10-23 18:16:24,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:16:24,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:16:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:16:24,332 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 23 states. [2020-10-23 18:16:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:25,126 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:16:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:16:25,127 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2020-10-23 18:16:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:25,129 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:16:25,129 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:16:25,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 18:16:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:16:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:16:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:16:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:16:25,138 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:16:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:25,139 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:16:25,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:16:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:16:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:16:25,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:25,140 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:25,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:25,354 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-10-23 18:16:25,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:25,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743261998] [2020-10-23 18:16:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:25,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:16:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743261998] [2020-10-23 18:16:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922347621] [2020-10-23 18:16:26,798 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:26,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:16:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:26,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 67 conjunts are in the unsatisfiable core [2020-10-23 18:16:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:16:26,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:26,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2020-10-23 18:16:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485725488] [2020-10-23 18:16:26,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 18:16:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 18:16:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:16:26,998 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 36 states. [2020-10-23 18:16:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:30,183 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:16:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 18:16:30,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2020-10-23 18:16:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:30,186 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:16:30,186 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:16:30,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2020-10-23 18:16:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:16:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:16:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:16:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:16:30,195 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:16:30,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:30,195 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:16:30,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 18:16:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:16:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:16:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:30,197 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:30,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:16:30,413 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:30,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:30,414 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-10-23 18:16:30,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:30,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479484932] [2020-10-23 18:16:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 32 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:16:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479484932] [2020-10-23 18:16:31,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546813631] [2020-10-23 18:16:31,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:31,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:31,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:16:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:16:31,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:16:31,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2020-10-23 18:16:31,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234575263] [2020-10-23 18:16:31,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:16:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:16:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:16:31,401 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2020-10-23 18:16:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:31,813 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-10-23 18:16:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:16:31,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-10-23 18:16:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:31,815 INFO L225 Difference]: With dead ends: 65 [2020-10-23 18:16:31,815 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:16:31,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=1196, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 18:16:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:16:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:16:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:16:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:16:31,817 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 111 [2020-10-23 18:16:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:31,818 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:16:31,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:16:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:16:31,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:16:32,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:16:32,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:16:32,150 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:16:32,151 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:16:32,151 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:16:32,151 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:16:32,151 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:32,152 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 18:16:32,152 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:32,152 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:16:32,152 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:16:32,152 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:16:32,152 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:16:32,152 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-10-23 18:16:32,152 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:16:32,152 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= 15 main_~input~0) [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-10-23 18:16:32,153 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-10-23 18:16:32,153 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-10-23 18:16:32,153 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-23 18:16:32,154 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-23 18:16:32,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:16:32 BoogieIcfgContainer [2020-10-23 18:16:32,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:16:32,168 INFO L168 Benchmark]: Toolchain (without parser) took 26787.44 ms. Allocated memory was 152.0 MB in the beginning and 393.2 MB in the end (delta: 241.2 MB). Free memory was 134.2 MB in the beginning and 240.9 MB in the end (delta: -106.7 MB). Peak memory consumption was 134.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:32,169 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:16:32,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.80 ms. Allocated memory is still 152.0 MB. Free memory was 133.5 MB in the beginning and 124.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:32,170 INFO L168 Benchmark]: Boogie Preprocessor took 34.67 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 123.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:32,171 INFO L168 Benchmark]: RCFGBuilder took 404.59 ms. Allocated memory is still 152.0 MB. Free memory was 123.3 MB in the beginning and 124.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:32,171 INFO L168 Benchmark]: TraceAbstraction took 26089.94 ms. Allocated memory was 152.0 MB in the beginning and 393.2 MB in the end (delta: 241.2 MB). Free memory was 124.0 MB in the beginning and 240.9 MB in the end (delta: -116.9 MB). Peak memory consumption was 125.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:16:32,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.80 ms. Allocated memory is still 152.0 MB. Free memory was 133.5 MB in the beginning and 124.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.67 ms. Allocated memory is still 152.0 MB. Free memory was 124.5 MB in the beginning and 123.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 404.59 ms. Allocated memory is still 152.0 MB. Free memory was 123.3 MB in the beginning and 124.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 3.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26089.94 ms. Allocated memory was 152.0 MB in the beginning and 393.2 MB in the end (delta: 241.2 MB). Free memory was 124.0 MB in the beginning and 240.9 MB in the end (delta: -116.9 MB). Peak memory consumption was 125.0 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.8s, OverallIterations: 17, TraceHistogramMax: 17, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 285 SDtfs, 850 SDslu, 826 SDs, 0 SdLazy, 3149 SolverSat, 495 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1800 GetRequests, 1335 SyntacticMatches, 1 SemanticMatches, 464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 10.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=16, 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, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 27 PreInvPairs, 27 NumberOfFragments, 43 HoareAnnotationTreeSize, 27 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 128 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 2127 NumberOfCodeBlocks, 2127 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2094 ConstructedInterpolants, 0 QuantifiedInterpolants, 451640 SizeOfPredicates, 152 NumberOfNonLiveVariables, 3456 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 33 InterpolantComputations, 2 PerfectInterpolantSequences, 5376/9248 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...