/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_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:16:35,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:16:35,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:16:35,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:16:35,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:16:35,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:16:35,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:16:35,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:16:35,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:16:35,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:16:35,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:16:35,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:16:35,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:16:35,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:16:35,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:16:35,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:16:35,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:16:35,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:16:35,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:16:35,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:16:35,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:16:35,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:16:35,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:16:35,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:16:35,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:16:35,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:16:35,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:16:35,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:16:35,343 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 18:16:35,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:16:35,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:16:35,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:16:35,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:16:35,413 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:16:35,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:16:35,413 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:16:35,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:16:35,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:16:35,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:16:35,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:16:35,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:16:35,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:16:35,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:16:35,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:16:35,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:16:35,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:16:35,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:16:35,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:16:35,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:16:35,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:16:35,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:16:35,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:16:35,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:16:35,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:16:35,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:16:35,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:16:35,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:16:35,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:16:35,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:16:35,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:16:35,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:16:35,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:16:35,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:16:35,916 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:16:35,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-10-23 18:16:36,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902d3e854/c4798a3916ce413eaecb025e754b0fc6/FLAG9eca61a7e [2020-10-23 18:16:36,654 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:16:36,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-10-23 18:16:36,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902d3e854/c4798a3916ce413eaecb025e754b0fc6/FLAG9eca61a7e [2020-10-23 18:16:37,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902d3e854/c4798a3916ce413eaecb025e754b0fc6 [2020-10-23 18:16:37,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:16:37,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:16:37,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:37,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:16:37,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:16:37,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473bfcb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37, skipping insertion in model container [2020-10-23 18:16:37,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:16:37,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:16:37,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:37,268 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:16:37,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:16:37,307 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:16:37,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37 WrapperNode [2020-10-23 18:16:37,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:16:37,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:16:37,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:16:37,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:16:37,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (1/1) ... [2020-10-23 18:16:37,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:16:37,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:16:37,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:16:37,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:16:37,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (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 18:16:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:16:37,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:16:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:16:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:16:37,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:16:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:16:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:16:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:16:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:16:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:16:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:16:37,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:16:37,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:16:37,822 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:16:37,823 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:16:37,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:37 BoogieIcfgContainer [2020-10-23 18:16:37,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:16:37,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:16:37,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:16:37,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:16:37,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:16:37" (1/3) ... [2020-10-23 18:16:37,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318f0588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:37, skipping insertion in model container [2020-10-23 18:16:37,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:16:37" (2/3) ... [2020-10-23 18:16:37,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318f0588 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:16:37, skipping insertion in model container [2020-10-23 18:16:37,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:16:37" (3/3) ... [2020-10-23 18:16:37,838 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-10-23 18:16:37,854 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:16:37,862 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:16:37,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:16:38,030 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:16:38,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:16:38,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:16:38,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:16:38,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:16:38,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:16:38,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:16:38,032 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:16:38,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:16:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:16:38,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:38,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:16:38,062 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:38,083 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:16:38,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:38,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023586699] [2020-10-23 18:16:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:38,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:16:38,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023586699] [2020-10-23 18:16:38,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:16:38,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:16:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780678910] [2020-10-23 18:16:38,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:16:38,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:16:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:16:38,621 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:16:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:38,870 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-23 18:16:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:16:38,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:16:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:38,883 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:16:38,883 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:16:38,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:16:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:16:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:16:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:16:38,957 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:16:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:38,957 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:16:38,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:16:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:16:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:16:38,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:38,960 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 18:16:38,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:16:38,960 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:16:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:38,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645940076] [2020-10-23 18:16:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,149 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 18:16:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645940076] [2020-10-23 18:16:39,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698159955] [2020-10-23 18:16:39,150 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 18:16:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:16:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:39,322 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 18:16:39,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:39,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-10-23 18:16:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333980436] [2020-10-23 18:16:39,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:16:39,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:16:39,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:16:39,327 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-23 18:16:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:39,591 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:16:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:16:39,592 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:16:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:39,594 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:16:39,594 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:16:39,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:16:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:16:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:16:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:16:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:16:39,605 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:16:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:39,605 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:16:39,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:16:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:16:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:16:39,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:39,607 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 18:16:39,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:16:39,821 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:39,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:16:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496835657] [2020-10-23 18:16:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:39,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:40,101 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 18:16:40,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496835657] [2020-10-23 18:16:40,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674443574] [2020-10-23 18:16:40,102 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 18:16:40,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:16:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:40,291 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 18:16:40,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:40,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-10-23 18:16:40,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58797852] [2020-10-23 18:16:40,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:40,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:40,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:40,295 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2020-10-23 18:16:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:40,773 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:16:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:40,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-23 18:16:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:40,776 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:16:40,776 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:16:40,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:16:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:16:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:16:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:16:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:16:40,786 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:16:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:40,787 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:16:40,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:16:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:16:40,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:40,789 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 18:16:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:41,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:16:41,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617911657] [2020-10-23 18:16:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:41,201 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 18:16:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617911657] [2020-10-23 18:16:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140218642] [2020-10-23 18:16:41,202 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 18:16:41,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:16:41,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:16:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:41,440 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 18:16:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:41,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-10-23 18:16:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232795589] [2020-10-23 18:16:41,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:41,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:41,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:41,443 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2020-10-23 18:16:41,774 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-23 18:16:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:42,167 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:16:42,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:42,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-23 18:16:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:42,170 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:16:42,170 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:16:42,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:16:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:16:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:16:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:16:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:16:42,179 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:16:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:42,180 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:16:42,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:42,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:16:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:16:42,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:42,182 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 18:16:42,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:42,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:42,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:16:42,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:42,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237967619] [2020-10-23 18:16:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:42,674 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 18:16:42,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237967619] [2020-10-23 18:16:42,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925106864] [2020-10-23 18:16:42,676 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 18:16:42,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:16:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:42,819 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 18:16:42,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:42,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-23 18:16:42,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743075437] [2020-10-23 18:16:42,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:16:42,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:16:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:16:42,822 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-10-23 18:16:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:43,363 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:16:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:16:43,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-23 18:16:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:43,366 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:16:43,366 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:16:43,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:16:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:16:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:16:43,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:16:43,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:16:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:43,388 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:16:43,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:16:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:16:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:16:43,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:43,391 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 18:16:43,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:43,593 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:16:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:43,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393891996] [2020-10-23 18:16:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:43,921 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 18:16:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393891996] [2020-10-23 18:16:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240164959] [2020-10-23 18:16:43,923 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 18:16:43,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:16:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:16:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:44,289 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 18:16:44,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:44,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2020-10-23 18:16:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427356406] [2020-10-23 18:16:44,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:16:44,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:16:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:16:44,292 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2020-10-23 18:16:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:45,151 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:16:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:45,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-23 18:16:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:45,154 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:16:45,154 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:16:45,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:16:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:16:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:16:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:16:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:16:45,165 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:16:45,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:45,165 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:16:45,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:16:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:16:45,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:16:45,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:45,167 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 18:16:45,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:16:45,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-10-23 18:16:45,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:45,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113915438] [2020-10-23 18:16:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:45,738 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 18:16:45,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113915438] [2020-10-23 18:16:45,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159807122] [2020-10-23 18:16:45,739 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 18:16:45,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:16:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:16:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:45,938 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 18:16:45,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:45,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2020-10-23 18:16:45,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673878416] [2020-10-23 18:16:45,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:16:45,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:45,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:16:45,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:16:45,946 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-23 18:16:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:46,434 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:16:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:16:46,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-23 18:16:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:46,437 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:16:46,437 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:16:46,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:16:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:16:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:16:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:16:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:16:46,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:16:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:46,454 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:16:46,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:16:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:16:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:16:46,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:46,456 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 18:16:46,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:46,671 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:46,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-10-23 18:16:46,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:46,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659487733] [2020-10-23 18:16:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:46,948 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 18:16:46,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659487733] [2020-10-23 18:16:46,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011397185] [2020-10-23 18:16:46,949 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 18:16:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:47,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-23 18:16:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:47,114 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 18:16:47,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:47,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2020-10-23 18:16:47,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458440677] [2020-10-23 18:16:47,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:16:47,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:16:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:16:47,117 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2020-10-23 18:16:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:47,688 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:16:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:16:47,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-23 18:16:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:47,690 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:16:47,690 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:16:47,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:16:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:16:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:16:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:16:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:16:47,699 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:16:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:47,700 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:16:47,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:16:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:16:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:16:47,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:47,702 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 18:16:47,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:47,915 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-10-23 18:16:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:47,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052366035] [2020-10-23 18:16:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:47,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:48,231 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 18:16:48,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052366035] [2020-10-23 18:16:48,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293723190] [2020-10-23 18:16:48,232 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 18:16:48,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:16:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-23 18:16:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:48,428 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 18:16:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-10-23 18:16:48,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232714753] [2020-10-23 18:16:48,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:16:48,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:16:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:16:48,437 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-10-23 18:16:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:49,029 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:16:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:16:49,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-23 18:16:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:49,032 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:16:49,032 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:16:49,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:16:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:16:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:16:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:16:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:16:49,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:16:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:49,042 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:16:49,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:16:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:16:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:16:49,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:49,043 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 18:16:49,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:16:49,258 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:49,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:49,259 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-10-23 18:16:49,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:49,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398383530] [2020-10-23 18:16:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:49,711 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 18:16:49,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398383530] [2020-10-23 18:16:49,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425112991] [2020-10-23 18:16:49,712 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 18:16:49,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:16:49,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:49,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:16:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:50,376 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 18:16:50,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 36 [2020-10-23 18:16:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431679226] [2020-10-23 18:16:50,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 18:16:50,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:50,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 18:16:50,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:16:50,381 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 36 states. [2020-10-23 18:16:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:51,995 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:16:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:16:51,996 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2020-10-23 18:16:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:51,999 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:16:51,999 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:16:52,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 18:16:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:16:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:16:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:16:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:16:52,009 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:16:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:52,009 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:16:52,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 18:16:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:16:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:16:52,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:52,011 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 18:16:52,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:52,225 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-10-23 18:16:52,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:52,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223353415] [2020-10-23 18:16:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:52,687 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 18:16:52,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223353415] [2020-10-23 18:16:52,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314200956] [2020-10-23 18:16:52,688 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 18:16:52,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:16:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:16:52,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:52,872 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 18:16:52,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:52,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2020-10-23 18:16:52,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254606373] [2020-10-23 18:16:52,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 18:16:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 18:16:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:16:52,875 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-10-23 18:16:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:53,584 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:16:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:16:53,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-23 18:16:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:53,586 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:16:53,587 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:16:53,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:16:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:16:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:16:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:16:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:16:53,596 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:16:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:53,597 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:16:53,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 18:16:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:16:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:16:53,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:53,598 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 18:16:53,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:16:53,812 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-10-23 18:16:53,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:53,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831871316] [2020-10-23 18:16:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:53,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:54,323 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 18:16:54,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831871316] [2020-10-23 18:16:54,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743367395] [2020-10-23 18:16:54,324 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 18:16:54,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:16:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:16:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:54,533 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 18:16:54,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:54,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 19 [2020-10-23 18:16:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812792842] [2020-10-23 18:16:54,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:16:54,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:16:54,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:16:54,538 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2020-10-23 18:16:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:55,319 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:16:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:16:55,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-23 18:16:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:55,321 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:16:55,321 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:16:55,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:16:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:16:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:16:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:16:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:16:55,331 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:16:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:55,331 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:16:55,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:16:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:16:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:16:55,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:55,333 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 18:16:55,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:16:55,548 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:55,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-10-23 18:16:55,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:55,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856452336] [2020-10-23 18:16:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:55,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:56,140 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 18:16:56,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856452336] [2020-10-23 18:16:56,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836770141] [2020-10-23 18:16:56,141 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 18:16:56,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:16:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:16:56,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-23 18:16:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:16:57,146 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 18:16:57,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:16:57,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 45 [2020-10-23 18:16:57,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883940271] [2020-10-23 18:16:57,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 18:16:57,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:16:57,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 18:16:57,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 18:16:57,150 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 45 states. [2020-10-23 18:16:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:16:59,289 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:16:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 18:16:59,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2020-10-23 18:16:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:16:59,292 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:16:59,292 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:16:59,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=924, Invalid=4188, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 18:16:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:16:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:16:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:16:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:16:59,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:16:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:16:59,303 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:16:59,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 18:16:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:16:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:16:59,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:16:59,308 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 18:16:59,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:16:59,524 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:16:59,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:16:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-10-23 18:16:59,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:16:59,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920902161] [2020-10-23 18:16:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:16:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:16:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:16:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:16:59,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:16:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,149 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 18:17:00,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920902161] [2020-10-23 18:17:00,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161505913] [2020-10-23 18:17:00,155 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 18:17:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-23 18:17:00,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:00,360 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 18:17:00,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:00,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2020-10-23 18:17:00,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212690121] [2020-10-23 18:17:00,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:17:00,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:00,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:17:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:17:00,366 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 21 states. [2020-10-23 18:17:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:01,252 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:17:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:17:01,252 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-23 18:17:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:01,254 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:17:01,254 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:17:01,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:17:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:17:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:17:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:17:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:17:01,262 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:17:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:01,263 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:17:01,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:17:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:17:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:17:01,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:01,264 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 18:17:01,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:17:01,475 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-10-23 18:17:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:01,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855171941] [2020-10-23 18:17:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:01,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:02,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:02,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:02,121 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 18:17:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855171941] [2020-10-23 18:17:02,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836134338] [2020-10-23 18:17:02,122 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 18:17:02,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:17:02,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 18:17:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:02,311 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 18:17:02,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:02,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 22 [2020-10-23 18:17:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436357743] [2020-10-23 18:17:02,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 18:17:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 18:17:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:17:02,314 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-10-23 18:17:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:03,267 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:17:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:17:03,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2020-10-23 18:17:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:03,270 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:17:03,270 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:17:03,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=995, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:17:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:17:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:17:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:17:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:17:03,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:17:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:17:03,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 18:17:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:17:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:17:03,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:03,281 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 18:17:03,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:03,495 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-10-23 18:17:03,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:03,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690051876] [2020-10-23 18:17:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:04,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:04,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:04,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:04,178 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 18:17:04,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690051876] [2020-10-23 18:17:04,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026746549] [2020-10-23 18:17:04,179 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 18:17:04,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:17:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:17:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:04,380 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 18:17:04,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:04,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 23 [2020-10-23 18:17:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696732854] [2020-10-23 18:17:04,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:17:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:17:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:17:04,383 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 23 states. [2020-10-23 18:17:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:05,403 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:17:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:17:05,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2020-10-23 18:17:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:05,404 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:17:05,404 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:17:05,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:17:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:17:05,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:17:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:17:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:17:05,412 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:17:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:05,413 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:17:05,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:17:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:17:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:17:05,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:05,414 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 18:17:05,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:17:05,628 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-10-23 18:17:05,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:05,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745280619] [2020-10-23 18:17:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:05,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:17:06,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745280619] [2020-10-23 18:17:06,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341389409] [2020-10-23 18:17:06,309 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 18:17:06,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:17:06,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-23 18:17:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:17:06,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:06,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 24 [2020-10-23 18:17:06,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314161703] [2020-10-23 18:17:06,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:17:06,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:06,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:17:06,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:17:06,510 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 24 states. [2020-10-23 18:17:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:07,543 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:17:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:17:07,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-23 18:17:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:07,545 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:17:07,545 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:17:07,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=600, Invalid=1206, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 18:17:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:17:07,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:17:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:17:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:17:07,553 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:17:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:07,553 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:17:07,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:17:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:17:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:17:07,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:07,555 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:07,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:17:07,770 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:07,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:07,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1831747727, now seen corresponding path program 17 times [2020-10-23 18:17:07,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:07,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386766806] [2020-10-23 18:17:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:07,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:17:08,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386766806] [2020-10-23 18:17:08,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142989071] [2020-10-23 18:17:08,655 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:08,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:17:08,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-23 18:17:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:17:10,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:10,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 39] total 60 [2020-10-23 18:17:10,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228316651] [2020-10-23 18:17:10,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 18:17:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 18:17:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 18:17:10,202 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 60 states. [2020-10-23 18:17:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:13,338 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-23 18:17:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 18:17:13,339 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2020-10-23 18:17:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:13,340 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:17:13,340 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:17:13,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1679, Invalid=7633, Unknown=0, NotChecked=0, Total=9312 [2020-10-23 18:17:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:17:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 18:17:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 18:17:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 18:17:13,350 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 117 [2020-10-23 18:17:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:13,350 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 18:17:13,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 18:17:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 18:17:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 18:17:13,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:13,352 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:13,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 18:17:13,566 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:13,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1286539077, now seen corresponding path program 18 times [2020-10-23 18:17:13,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:13,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211904978] [2020-10-23 18:17:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:13,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:17:14,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211904978] [2020-10-23 18:17:14,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645990815] [2020-10-23 18:17:14,607 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:14,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:17:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:14,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 18:17:14,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 18:17:16,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:16,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41] total 63 [2020-10-23 18:17:16,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18724362] [2020-10-23 18:17:16,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-23 18:17:16,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:16,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-23 18:17:16,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2020-10-23 18:17:16,318 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 63 states. [2020-10-23 18:17:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:19,872 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-10-23 18:17:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 18:17:19,872 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2020-10-23 18:17:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:19,874 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:17:19,874 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:17:19,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1857, Invalid=8445, Unknown=0, NotChecked=0, Total=10302 [2020-10-23 18:17:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:17:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-23 18:17:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 18:17:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-23 18:17:19,884 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 123 [2020-10-23 18:17:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:19,885 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-23 18:17:19,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-23 18:17:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-23 18:17:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 18:17:19,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:19,886 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:20,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:20,092 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash 626937743, now seen corresponding path program 19 times [2020-10-23 18:17:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:20,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457714863] [2020-10-23 18:17:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:20,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:20,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:17:21,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457714863] [2020-10-23 18:17:21,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844243226] [2020-10-23 18:17:21,146 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-23 18:17:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:17:21,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:21,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 27 [2020-10-23 18:17:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181110797] [2020-10-23 18:17:21,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:17:21,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:21,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:17:21,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:17:21,421 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 27 states. [2020-10-23 18:17:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:22,728 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 18:17:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:17:22,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 129 [2020-10-23 18:17:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:22,730 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:17:22,731 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 18:17:22,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=792, Invalid=1560, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 18:17:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 18:17:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-23 18:17:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 18:17:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-23 18:17:22,738 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 129 [2020-10-23 18:17:22,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:22,739 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-23 18:17:22,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:17:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-23 18:17:22,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-23 18:17:22,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:22,740 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:22,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:22,944 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1436396997, now seen corresponding path program 20 times [2020-10-23 18:17:22,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:22,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588301584] [2020-10-23 18:17:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:23,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-23 18:17:24,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588301584] [2020-10-23 18:17:24,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840720328] [2020-10-23 18:17:24,105 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:24,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:17:24,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-23 18:17:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-23 18:17:24,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:24,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 28 [2020-10-23 18:17:24,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163993321] [2020-10-23 18:17:24,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 18:17:24,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 18:17:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=471, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:17:24,346 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 28 states. [2020-10-23 18:17:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:25,714 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-10-23 18:17:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 18:17:25,714 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 135 [2020-10-23 18:17:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:25,717 INFO L225 Difference]: With dead ends: 85 [2020-10-23 18:17:25,717 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 18:17:25,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=862, Invalid=1688, Unknown=0, NotChecked=0, Total=2550 [2020-10-23 18:17:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 18:17:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-23 18:17:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 18:17:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-23 18:17:25,724 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 135 [2020-10-23 18:17:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:25,725 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-23 18:17:25,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 18:17:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-23 18:17:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-23 18:17:25,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:25,728 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:25,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-23 18:17:25,943 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1444475249, now seen corresponding path program 21 times [2020-10-23 18:17:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102516414] [2020-10-23 18:17:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:26,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-23 18:17:27,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102516414] [2020-10-23 18:17:27,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585211720] [2020-10-23 18:17:27,096 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:27,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-10-23 18:17:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:27,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 46 conjunts are in the unsatisfiable core [2020-10-23 18:17:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-23 18:17:27,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:27,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 29 [2020-10-23 18:17:27,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036575987] [2020-10-23 18:17:27,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 18:17:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 18:17:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=503, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:17:27,375 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 29 states. [2020-10-23 18:17:28,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:28,848 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-10-23 18:17:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:17:28,852 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 141 [2020-10-23 18:17:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:28,853 INFO L225 Difference]: With dead ends: 88 [2020-10-23 18:17:28,853 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 18:17:28,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=935, Invalid=1821, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 18:17:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 18:17:28,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-23 18:17:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 18:17:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-23 18:17:28,860 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 141 [2020-10-23 18:17:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:28,860 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-23 18:17:28,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 18:17:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-23 18:17:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-23 18:17:28,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:28,862 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-23 18:17:29,076 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1489069125, now seen corresponding path program 22 times [2020-10-23 18:17:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:29,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418471245] [2020-10-23 18:17:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:30,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-23 18:17:30,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418471245] [2020-10-23 18:17:30,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170416515] [2020-10-23 18:17:30,388 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:30,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:17:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-23 18:17:30,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-23 18:17:30,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:30,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 30 [2020-10-23 18:17:30,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228562083] [2020-10-23 18:17:30,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 18:17:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 18:17:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=536, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:17:30,670 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 30 states. [2020-10-23 18:17:32,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:32,209 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-10-23 18:17:32,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 18:17:32,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-23 18:17:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:32,212 INFO L225 Difference]: With dead ends: 91 [2020-10-23 18:17:32,212 INFO L226 Difference]: Without dead ends: 86 [2020-10-23 18:17:32,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1011, Invalid=1959, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 18:17:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-23 18:17:32,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-23 18:17:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 18:17:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-23 18:17:32,218 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 147 [2020-10-23 18:17:32,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:32,219 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-23 18:17:32,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 18:17:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-23 18:17:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-23 18:17:32,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:32,220 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:32,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:32,431 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash 555515279, now seen corresponding path program 23 times [2020-10-23 18:17:32,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:32,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384591757] [2020-10-23 18:17:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:32,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-23 18:17:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384591757] [2020-10-23 18:17:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590370109] [2020-10-23 18:17:33,880 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:33,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-10-23 18:17:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-23 18:17:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-23 18:17:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 31 [2020-10-23 18:17:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123170500] [2020-10-23 18:17:34,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:17:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:17:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:17:34,144 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 31 states. [2020-10-23 18:17:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:35,737 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-10-23 18:17:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-23 18:17:35,738 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2020-10-23 18:17:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:35,740 INFO L225 Difference]: With dead ends: 94 [2020-10-23 18:17:35,740 INFO L226 Difference]: Without dead ends: 89 [2020-10-23 18:17:35,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1090, Invalid=2102, Unknown=0, NotChecked=0, Total=3192 [2020-10-23 18:17:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-23 18:17:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-23 18:17:35,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:17:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-23 18:17:35,747 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 153 [2020-10-23 18:17:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:35,748 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-23 18:17:35,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:17:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-23 18:17:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-23 18:17:35,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:35,749 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:35,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-23 18:17:35,964 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash -341431611, now seen corresponding path program 24 times [2020-10-23 18:17:35,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:35,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684683012] [2020-10-23 18:17:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:36,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-23 18:17:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684683012] [2020-10-23 18:17:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518915834] [2020-10-23 18:17:37,409 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:37,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-10-23 18:17:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:37,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 52 conjunts are in the unsatisfiable core [2020-10-23 18:17:37,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-23 18:17:37,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:37,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 32 [2020-10-23 18:17:37,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019723648] [2020-10-23 18:17:37,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 18:17:37,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 18:17:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=605, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:17:37,703 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 32 states. [2020-10-23 18:17:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:39,468 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-23 18:17:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 18:17:39,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 159 [2020-10-23 18:17:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:39,471 INFO L225 Difference]: With dead ends: 97 [2020-10-23 18:17:39,471 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:17:39,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1172, Invalid=2250, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 18:17:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:17:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-23 18:17:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:17:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-10-23 18:17:39,479 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 159 [2020-10-23 18:17:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-10-23 18:17:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 18:17:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-10-23 18:17:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 18:17:39,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:39,481 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:39,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:39,696 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -28140401, now seen corresponding path program 25 times [2020-10-23 18:17:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:39,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550475723] [2020-10-23 18:17:39,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:17:39,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:17:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:17:39,791 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:17:39,848 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:17:39,849 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:17:39,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 18:17:39,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:17:39 BoogieIcfgContainer [2020-10-23 18:17:39,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:17:39,979 INFO L168 Benchmark]: Toolchain (without parser) took 62926.82 ms. Allocated memory was 176.2 MB in the beginning and 638.6 MB in the end (delta: 462.4 MB). Free memory was 151.6 MB in the beginning and 463.1 MB in the end (delta: -311.5 MB). Peak memory consumption was 151.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:39,980 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory was 97.4 MB in the beginning and 97.3 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:17:39,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.98 ms. Allocated memory is still 176.2 MB. Free memory was 151.1 MB in the beginning and 141.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:39,981 INFO L168 Benchmark]: Boogie Preprocessor took 41.18 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 140.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:39,981 INFO L168 Benchmark]: RCFGBuilder took 472.92 ms. Allocated memory is still 176.2 MB. Free memory was 140.2 MB in the beginning and 128.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:39,981 INFO L168 Benchmark]: TraceAbstraction took 62149.44 ms. Allocated memory was 176.2 MB in the beginning and 638.6 MB in the end (delta: 462.4 MB). Free memory was 127.6 MB in the beginning and 463.1 MB in the end (delta: -335.5 MB). Peak memory consumption was 127.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:17:39,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory was 97.4 MB in the beginning and 97.3 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.98 ms. Allocated memory is still 176.2 MB. Free memory was 151.1 MB in the beginning and 141.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.18 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 140.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 472.92 ms. Allocated memory is still 176.2 MB. Free memory was 140.2 MB in the beginning and 128.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 62149.44 ms. Allocated memory was 176.2 MB in the beginning and 638.6 MB in the end (delta: 462.4 MB). Free memory was 127.6 MB in the beginning and 463.1 MB in the end (delta: -335.5 MB). Peak memory consumption was 127.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 25; VAL [input=25] [L13] CALL, EXPR id(input) VAL [\old(x)=25] [L7] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L8] CALL, EXPR id(x-1) VAL [\old(x)=24] [L7] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L8] CALL, EXPR id(x-1) VAL [\old(x)=23] [L7] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L8] CALL, EXPR id(x-1) VAL [\old(x)=22] [L7] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L8] CALL, EXPR id(x-1) VAL [\old(x)=21] [L7] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L8] CALL, EXPR id(x-1) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=25, input=25] [L13] int result = id(input); [L14] COND TRUE result == 25 VAL [input=25, result=25] [L15] CALL reach_error() [L4] __assert_fail("0", "id_i25_o25-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 61.8s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 29.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 347 SDtfs, 1702 SDslu, 1202 SDs, 0 SdLazy, 3477 SolverSat, 1191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3692 GetRequests, 2664 SyntacticMatches, 0 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11181 ImplicationChecksByTransitivity, 35.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 4500 NumberOfCodeBlocks, 4500 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4286 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209272 SizeOfPredicates, 275 NumberOfNonLiveVariables, 6552 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 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 incorrect! Received shutdown request...