/usr/bin/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-fb55353 [2019-11-06 18:42:12,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:12,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:12,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:12,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:12,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:12,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:12,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:12,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:12,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:12,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:12,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:12,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:12,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:12,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:12,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:12,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:12,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:12,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:12,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:12,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:12,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:12,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:12,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:12,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:12,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:12,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:12,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:12,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:12,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:12,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:12,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:12,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:12,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:12,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:12,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:12,279 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 [2019-11-06 18:42:12,303 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:12,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:12,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:12,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:12,306 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:12,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:12,306 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:12,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:12,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:12,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:12,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:12,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:12,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:12,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:12,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:12,309 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:12,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:12,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:12,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:12,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:12,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:12,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:12,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:12,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:12,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:12,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:12,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:12,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:12,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:12,593 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:12,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:12,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:12,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:12,619 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:12,620 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-11-06 18:42:12,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53804022/0300a0784ef54c4c85fcdaa598422529/FLAG3012b003c [2019-11-06 18:42:13,182 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:13,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-11-06 18:42:13,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53804022/0300a0784ef54c4c85fcdaa598422529/FLAG3012b003c [2019-11-06 18:42:13,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e53804022/0300a0784ef54c4c85fcdaa598422529 [2019-11-06 18:42:13,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:13,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:13,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:13,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:13,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:13,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b8d5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13, skipping insertion in model container [2019-11-06 18:42:13,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:13,594 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:13,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:13,764 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:13,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:13,811 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:13,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13 WrapperNode [2019-11-06 18:42:13,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:13,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:13,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:13,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:13,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (1/1) ... [2019-11-06 18:42:13,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:13,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:13,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:13,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:13,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (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 [2019-11-06 18:42:14,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:14,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:14,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:14,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:14,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:42:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:14,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:14,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:14,470 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:14,471 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-06 18:42:14,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:14 BoogieIcfgContainer [2019-11-06 18:42:14,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:14,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:14,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:14,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:14,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:13" (1/3) ... [2019-11-06 18:42:14,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab53220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:14, skipping insertion in model container [2019-11-06 18:42:14,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:13" (2/3) ... [2019-11-06 18:42:14,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab53220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:14, skipping insertion in model container [2019-11-06 18:42:14,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:14" (3/3) ... [2019-11-06 18:42:14,480 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-11-06 18:42:14,490 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:14,497 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:14,509 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:14,534 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:14,534 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:14,534 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:14,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:14,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:14,534 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:14,534 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:14,535 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-11-06 18:42:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:42:14,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:14,560 INFO L410 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] [2019-11-06 18:42:14,562 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-11-06 18:42:14,578 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:14,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233215223] [2019-11-06 18:42:14,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:14,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233215223] [2019-11-06 18:42:14,788 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:14,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:14,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553573903] [2019-11-06 18:42:14,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:14,803 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:14,822 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2019-11-06 18:42:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:15,032 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2019-11-06 18:42:15,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:15,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-06 18:42:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:15,044 INFO L225 Difference]: With dead ends: 88 [2019-11-06 18:42:15,044 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:42:15,048 INFO L630 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 [2019-11-06 18:42:15,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:42:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:42:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:42:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-11-06 18:42:15,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-11-06 18:42:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:15,096 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-11-06 18:42:15,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-11-06 18:42:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:42:15,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:15,099 INFO L410 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] [2019-11-06 18:42:15,099 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-11-06 18:42:15,100 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:15,100 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256049885] [2019-11-06 18:42:15,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:15,208 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256049885] [2019-11-06 18:42:15,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:15,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:15,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073950877] [2019-11-06 18:42:15,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:15,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:15,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:15,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:15,215 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-11-06 18:42:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:15,368 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-11-06 18:42:15,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:15,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-06 18:42:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:15,370 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:42:15,371 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:42:15,372 INFO L630 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 [2019-11-06 18:42:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:42:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 18:42:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:42:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-06 18:42:15,382 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-11-06 18:42:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:15,382 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-06 18:42:15,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-06 18:42:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:42:15,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:15,384 INFO L410 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] [2019-11-06 18:42:15,385 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-11-06 18:42:15,386 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:15,386 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523769008] [2019-11-06 18:42:15,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:42:15,485 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523769008] [2019-11-06 18:42:15,486 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:15,486 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:15,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983777758] [2019-11-06 18:42:15,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:15,487 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:15,488 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-11-06 18:42:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:15,675 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-11-06 18:42:15,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:15,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-06 18:42:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:15,677 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:42:15,677 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:42:15,678 INFO L630 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 [2019-11-06 18:42:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:42:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-11-06 18:42:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:42:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-11-06 18:42:15,687 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-11-06 18:42:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:15,688 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-11-06 18:42:15,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:15,688 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-11-06 18:42:15,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:42:15,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:15,690 INFO L410 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] [2019-11-06 18:42:15,690 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-11-06 18:42:15,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:15,691 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457011592] [2019-11-06 18:42:15,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:42:15,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457011592] [2019-11-06 18:42:15,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925625212] [2019-11-06 18:42:15,830 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 [2019-11-06 18:42:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:15,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:15,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:42:15,951 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:15,951 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:42:15,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127196307] [2019-11-06 18:42:15,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:42:15,953 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:15,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:42:15,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:15,953 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2019-11-06 18:42:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:16,091 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-11-06 18:42:16,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:42:16,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2019-11-06 18:42:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:16,093 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:42:16,093 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:42:16,094 INFO L630 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 [2019-11-06 18:42:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:42:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-06 18:42:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:42:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-11-06 18:42:16,102 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 47 [2019-11-06 18:42:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:16,102 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-11-06 18:42:16,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:42:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-11-06 18:42:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:42:16,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:16,104 INFO L410 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] [2019-11-06 18:42:16,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:16,305 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:16,306 INFO L82 PathProgramCache]: Analyzing trace with hash -946140994, now seen corresponding path program 2 times [2019-11-06 18:42:16,307 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:16,307 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452977164] [2019-11-06 18:42:16,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:42:16,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452977164] [2019-11-06 18:42:16,434 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643474841] [2019-11-06 18:42:16,434 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 [2019-11-06 18:42:16,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:16,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:16,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:16,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 18:42:16,539 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:16,539 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-06 18:42:16,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587407156] [2019-11-06 18:42:16,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:16,542 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:16,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:16,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:16,543 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 8 states. [2019-11-06 18:42:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:16,808 INFO L93 Difference]: Finished difference Result 124 states and 150 transitions. [2019-11-06 18:42:16,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:16,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-11-06 18:42:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:16,810 INFO L225 Difference]: With dead ends: 124 [2019-11-06 18:42:16,810 INFO L226 Difference]: Without dead ends: 81 [2019-11-06 18:42:16,811 INFO L630 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 [2019-11-06 18:42:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-06 18:42:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-11-06 18:42:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:42:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-11-06 18:42:16,822 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2019-11-06 18:42:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:16,822 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-11-06 18:42:16,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-11-06 18:42:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:42:16,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:16,826 INFO L410 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] [2019-11-06 18:42:17,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:17,030 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:17,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1302503220, now seen corresponding path program 3 times [2019-11-06 18:42:17,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:17,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177131137] [2019-11-06 18:42:17,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:42:17,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177131137] [2019-11-06 18:42:17,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796184845] [2019-11-06 18:42:17,171 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 [2019-11-06 18:42:17,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:42:17,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:17,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:17,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-06 18:42:17,301 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:17,301 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-06 18:42:17,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249253518] [2019-11-06 18:42:17,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:42:17,302 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:42:17,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:17,303 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 10 states. [2019-11-06 18:42:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:17,613 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2019-11-06 18:42:17,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:42:17,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-11-06 18:42:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:17,615 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:42:17,615 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:42:17,617 INFO L630 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 [2019-11-06 18:42:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:42:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-11-06 18:42:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 18:42:17,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2019-11-06 18:42:17,638 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 67 [2019-11-06 18:42:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:17,641 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2019-11-06 18:42:17,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:42:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2019-11-06 18:42:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-06 18:42:17,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:17,645 INFO L410 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] [2019-11-06 18:42:17,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:17,846 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2145096026, now seen corresponding path program 4 times [2019-11-06 18:42:17,846 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:17,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789759855] [2019-11-06 18:42:17,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:42:17,967 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789759855] [2019-11-06 18:42:17,968 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222053284] [2019-11-06 18:42:17,968 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 [2019-11-06 18:42:18,049 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:18,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:18,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:18,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 18:42:18,109 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:18,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 18:42:18,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484467973] [2019-11-06 18:42:18,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:42:18,111 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:18,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:42:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:18,112 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 12 states. [2019-11-06 18:42:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:18,452 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2019-11-06 18:42:18,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:42:18,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2019-11-06 18:42:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:18,454 INFO L225 Difference]: With dead ends: 192 [2019-11-06 18:42:18,455 INFO L226 Difference]: Without dead ends: 117 [2019-11-06 18:42:18,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-06 18:42:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-11-06 18:42:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-06 18:42:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2019-11-06 18:42:18,478 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 85 [2019-11-06 18:42:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:18,479 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2019-11-06 18:42:18,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:42:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2019-11-06 18:42:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 18:42:18,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:18,481 INFO L410 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] [2019-11-06 18:42:18,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:18,692 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash -613385624, now seen corresponding path program 5 times [2019-11-06 18:42:18,693 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:18,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538911832] [2019-11-06 18:42:18,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:42:18,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538911832] [2019-11-06 18:42:18,854 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474712944] [2019-11-06 18:42:18,854 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