java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:37,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:37,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:37,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:37,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:37,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:37,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:37,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:37,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:37,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:37,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:37,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:37,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:37,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:37,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:37,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:37,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:37,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:37,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:37,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:37,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:37,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:37,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:37,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:37,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:37,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:37,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:37,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:37,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:37,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:37,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:37,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:37,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:37,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:37,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:37,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:37,325 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 [2019-10-14 21:43:37,346 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:37,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:37,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:37,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:37,349 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:37,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:37,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:37,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:37,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:37,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:37,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:37,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:37,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:37,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:37,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:37,353 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:37,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:37,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:37,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:37,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:37,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:37,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:37,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:37,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:37,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:37,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:37,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:37,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:37,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:37,657 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:37,679 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:37,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:37,685 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:37,685 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:37,686 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-14 21:43:37,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c39aa7/9f9783d4c7264e5e89ec87510f459eee/FLAGde321c243 [2019-10-14 21:43:38,275 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:38,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-10-14 21:43:38,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c39aa7/9f9783d4c7264e5e89ec87510f459eee/FLAGde321c243 [2019-10-14 21:43:38,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314c39aa7/9f9783d4c7264e5e89ec87510f459eee [2019-10-14 21:43:38,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:38,650 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:38,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:38,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:38,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:38,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:38" (1/1) ... [2019-10-14 21:43:38,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708644ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:38, skipping insertion in model container [2019-10-14 21:43:38,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:38" (1/1) ... [2019-10-14 21:43:38,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:38,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:38,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:38,958 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:39,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:39,159 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:39,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39 WrapperNode [2019-10-14 21:43:39,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:39,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:39,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:39,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:39,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (1/1) ... [2019-10-14 21:43:39,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:39,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:39,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:39,238 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:39,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (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 [2019-10-14 21:43:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:39,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:39,769 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:39,769 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-14 21:43:39,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:39 BoogieIcfgContainer [2019-10-14 21:43:39,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:39,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:39,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:39,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:39,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:38" (1/3) ... [2019-10-14 21:43:39,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1fc384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:39, skipping insertion in model container [2019-10-14 21:43:39,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:39" (2/3) ... [2019-10-14 21:43:39,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1fc384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:39, skipping insertion in model container [2019-10-14 21:43:39,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:39" (3/3) ... [2019-10-14 21:43:39,779 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-10-14 21:43:39,787 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:39,794 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:39,805 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:39,832 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:39,832 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:39,832 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:39,832 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:39,833 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:39,833 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:39,833 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:39,833 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:39,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-10-14 21:43:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:39,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:39,863 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:39,865 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-10-14 21:43:39,877 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:39,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063299259] [2019-10-14 21:43:39,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:39,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:39,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:40,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063299259] [2019-10-14 21:43:40,079 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:40,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:40,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255339571] [2019-10-14 21:43:40,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:40,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:40,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:40,109 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2019-10-14 21:43:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:40,308 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2019-10-14 21:43:40,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:40,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-14 21:43:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:40,323 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:43:40,323 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:43:40,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:43:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:43:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:43:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:43:40,373 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-10-14 21:43:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:40,373 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:43:40,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:43:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:40,375 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:40,375 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:40,375 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:40,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:40,376 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-10-14 21:43:40,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:40,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099816700] [2019-10-14 21:43:40,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:40,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:40,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:43:40,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099816700] [2019-10-14 21:43:40,470 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:40,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:40,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590545846] [2019-10-14 21:43:40,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:40,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:40,474 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-14 21:43:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:40,664 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-10-14 21:43:40,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:40,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:43:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:40,666 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:43:40,667 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:40,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:43:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:43:40,678 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-10-14 21:43:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:40,678 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:43:40,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:43:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:43:40,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:40,680 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:40,680 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:40,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-10-14 21:43:40,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:40,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430422943] [2019-10-14 21:43:40,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:40,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:40,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:40,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430422943] [2019-10-14 21:43:40,759 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:40,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:40,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106081593] [2019-10-14 21:43:40,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:40,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:40,762 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-10-14 21:43:40,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:40,991 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-10-14 21:43:40,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:40,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-14 21:43:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:40,994 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:43:40,994 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:43:40,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:43:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-10-14 21:43:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:43:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:43:41,015 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-10-14 21:43:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:41,016 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:43:41,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:43:41,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:43:41,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:41,018 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:41,018 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-10-14 21:43:41,020 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:41,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762560982] [2019-10-14 21:43:41,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:41,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:41,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:43:41,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762560982] [2019-10-14 21:43:41,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859956938] [2019-10-14 21:43:41,188 INFO L94 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 [2019-10-14 21:43:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:41,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:41,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:43:41,308 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:41,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:41,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010120907] [2019-10-14 21:43:41,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:41,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:41,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:41,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:41,310 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2019-10-14 21:43:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:41,436 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-10-14 21:43:41,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:41,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2019-10-14 21:43:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:41,438 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:43:41,438 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:43:41,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:43:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 21:43:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:43:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-10-14 21:43:41,447 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 47 [2019-10-14 21:43:41,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:41,447 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-10-14 21:43:41,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-10-14 21:43:41,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:43:41,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:41,449 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:41,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:41,655 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash -946140994, now seen corresponding path program 2 times [2019-10-14 21:43:41,656 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:41,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121928664] [2019-10-14 21:43:41,657 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:41,657 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:41,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:43:41,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121928664] [2019-10-14 21:43:41,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362014483] [2019-10-14 21:43:41,761 INFO L92 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 [2019-10-14 21:43:41,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:41,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:41,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:41,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:43:41,856 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:41,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:43:41,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435511274] [2019-10-14 21:43:41,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:43:41,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:43:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:41,858 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 8 states. [2019-10-14 21:43:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:42,111 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2019-10-14 21:43:42,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:42,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-10-14 21:43:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:42,113 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:43:42,113 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:43:42,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:43:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:43:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-10-14 21:43:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:43:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-14 21:43:42,127 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2019-10-14 21:43:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:42,128 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-14 21:43:42,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:43:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-14 21:43:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:43:42,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:42,131 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:42,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:42,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1302503220, now seen corresponding path program 3 times [2019-10-14 21:43:42,339 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:42,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830073028] [2019-10-14 21:43:42,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:42,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:42,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:43:42,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830073028] [2019-10-14 21:43:42,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679790059] [2019-10-14 21:43:42,554 INFO L92 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 [2019-10-14 21:43:42,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:42,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:42,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:42,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:43:42,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:42,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:43:42,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464610415] [2019-10-14 21:43:42,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:42,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:42,681 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 10 states. [2019-10-14 21:43:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:42,974 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2019-10-14 21:43:42,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:42,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-14 21:43:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:42,976 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:43:42,976 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:43:42,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:43:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-10-14 21:43:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:43:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2019-10-14 21:43:43,003 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 67 [2019-10-14 21:43:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:43,003 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2019-10-14 21:43:43,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2019-10-14 21:43:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:43:43,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:43,008 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:43,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:43,209 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2145096026, now seen corresponding path program 4 times [2019-10-14 21:43:43,209 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:43,209 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843080616] [2019-10-14 21:43:43,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:43,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:43,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:43,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843080616] [2019-10-14 21:43:43,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725999857] [2019-10-14 21:43:43,364 INFO L92 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 [2019-10-14 21:43:43,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:43,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:43,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:43,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:43:43,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:43,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-10-14 21:43:43,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021061831] [2019-10-14 21:43:43,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:43,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:43,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:43,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:43,525 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 12 states. [2019-10-14 21:43:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:43,888 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2019-10-14 21:43:43,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:43,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2019-10-14 21:43:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:43,890 INFO L225 Difference]: With dead ends: 192 [2019-10-14 21:43:43,891 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:43:43,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:43:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-10-14 21:43:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-14 21:43:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2019-10-14 21:43:43,902 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 85 [2019-10-14 21:43:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:43,902 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2019-10-14 21:43:43,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2019-10-14 21:43:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:43:43,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:43,905 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:44,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:44,110 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -613385624, now seen corresponding path program 5 times [2019-10-14 21:43:44,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:44,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633434868] [2019-10-14 21:43:44,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:44,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:44,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 21:43:44,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633434868] [2019-10-14 21:43:44,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652971141] [2019-10-14 21:43:44,230 INFO L92 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