/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/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:39:28,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:39:28,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:39:28,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:39:28,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:39:28,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:39:28,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:39:28,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:39:28,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:39:28,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:39:28,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:39:28,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:39:28,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:39:28,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:39:28,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:39:28,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:39:28,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:39:28,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:39:28,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:39:28,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:39:28,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:39:28,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:39:28,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:39:28,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:39:28,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:39:28,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:39:28,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:39:28,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:39:28,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:39:28,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:39:28,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:39:28,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:39:28,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:39:28,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:39:28,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:39:28,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:39:28,659 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 18:39:28,681 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:39:28,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:39:28,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:39:28,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:39:28,683 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:39:28,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:39:28,684 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:39:28,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:39:28,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:39:28,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:39:28,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:39:28,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:39:28,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:39:28,686 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:39:28,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:39:28,687 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:39:28,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:39:28,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:39:28,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:39:28,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:39:28,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:39:28,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:39:28,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:39:28,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:39:29,027 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:39:29,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:39:29,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:39:29,057 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:39:29,058 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:39:29,058 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-11-06 18:39:29,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032560ae0/8605960e8f90421a8e34189111e18fcd/FLAGd06fe0353 [2019-11-06 18:39:29,528 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:39:29,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-11-06 18:39:29,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032560ae0/8605960e8f90421a8e34189111e18fcd/FLAGd06fe0353 [2019-11-06 18:39:29,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/032560ae0/8605960e8f90421a8e34189111e18fcd [2019-11-06 18:39:29,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:39:29,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:39:29,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:29,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:39:29,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:39:29,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:29" (1/1) ... [2019-11-06 18:39:29,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c0dd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:29, skipping insertion in model container [2019-11-06 18:39:29,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:39:29" (1/1) ... [2019-11-06 18:39:29,974 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:39:29,992 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:39:30,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:30,219 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:39:30,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:39:30,267 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:39:30,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30 WrapperNode [2019-11-06 18:39:30,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:39:30,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:39:30,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:39:30,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:39:30,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (1/1) ... [2019-11-06 18:39:30,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:39:30,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:39:30,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:39:30,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:39:30,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (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 18:39:30,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:39:30,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:39:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:39:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:39:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:39:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:39:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:39:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:39:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:39:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:39:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:39:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:39:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:39:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:39:30,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:39:30,816 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:39:30,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:30 BoogieIcfgContainer [2019-11-06 18:39:30,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:39:30,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:39:30,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:39:30,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:39:30,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:39:29" (1/3) ... [2019-11-06 18:39:30,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b7e0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:30, skipping insertion in model container [2019-11-06 18:39:30,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:39:30" (2/3) ... [2019-11-06 18:39:30,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b7e0ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:39:30, skipping insertion in model container [2019-11-06 18:39:30,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:39:30" (3/3) ... [2019-11-06 18:39:30,832 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2019-11-06 18:39:30,842 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:39:30,852 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:39:30,865 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:39:30,898 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:39:30,898 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:39:30,898 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:39:30,898 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:39:30,898 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:39:30,898 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:39:30,898 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:39:30,899 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:39:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-06 18:39:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:39:30,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:30,923 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:30,925 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1606204250, now seen corresponding path program 1 times [2019-11-06 18:39:30,937 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:30,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502418395] [2019-11-06 18:39:30,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,129 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 18:39:31,130 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502418395] [2019-11-06 18:39:31,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:31,131 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:39:31,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850723623] [2019-11-06 18:39:31,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:39:31,136 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:39:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:39:31,149 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-11-06 18:39:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,302 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2019-11-06 18:39:31,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:39:31,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:39:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,315 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:39:31,315 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:39:31,319 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 18:39:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:39:31,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:39:31,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:39:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-06 18:39:31,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-11-06 18:39:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,361 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-06 18:39:31,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:39:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-06 18:39:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:39:31,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,363 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:31,364 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash -729587696, now seen corresponding path program 1 times [2019-11-06 18:39:31,364 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,365 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351062521] [2019-11-06 18:39:31,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,439 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 18:39:31,440 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351062521] [2019-11-06 18:39:31,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:31,441 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:31,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991108430] [2019-11-06 18:39:31,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:31,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:31,444 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-11-06 18:39:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,592 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2019-11-06 18:39:31,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:31,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:39:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,594 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:39:31,594 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:39:31,595 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 18:39:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:39:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 18:39:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:39:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-11-06 18:39:31,604 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2019-11-06 18:39:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,604 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-11-06 18:39:31,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-11-06 18:39:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:39:31,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,606 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:31,606 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 617787630, now seen corresponding path program 1 times [2019-11-06 18:39:31,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080304107] [2019-11-06 18:39:31,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,694 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 18:39:31,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080304107] [2019-11-06 18:39:31,695 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:39:31,695 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:39:31,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140594647] [2019-11-06 18:39:31,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:39:31,696 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:39:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:39:31,700 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2019-11-06 18:39:31,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:31,829 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-11-06 18:39:31,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:39:31,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:39:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:31,831 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:39:31,831 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:39:31,832 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 18:39:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:39:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-11-06 18:39:31,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:39:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-11-06 18:39:31,840 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2019-11-06 18:39:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:31,841 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-11-06 18:39:31,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:39:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-11-06 18:39:31,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:39:31,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:31,842 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] [2019-11-06 18:39:31,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1226217789, now seen corresponding path program 1 times [2019-11-06 18:39:31,843 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:31,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606071659] [2019-11-06 18:39:31,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:31,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606071659] [2019-11-06 18:39:31,924 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622745694] [2019-11-06 18:39:31,924 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 18:39:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:31,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:39:32,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:39:32,047 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:32,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:39:32,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592916855] [2019-11-06 18:39:32,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:32,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:32,050 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 7 states. [2019-11-06 18:39:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:32,205 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2019-11-06 18:39:32,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:32,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-06 18:39:32,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:32,206 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:39:32,206 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:39:32,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:39:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-11-06 18:39:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:39:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-11-06 18:39:32,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 22 [2019-11-06 18:39:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:32,215 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-11-06 18:39:32,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-11-06 18:39:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:39:32,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:32,216 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:32,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:32,421 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:32,422 INFO L82 PathProgramCache]: Analyzing trace with hash 874149032, now seen corresponding path program 2 times [2019-11-06 18:39:32,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:32,423 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706520884] [2019-11-06 18:39:32,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-06 18:39:32,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706520884] [2019-11-06 18:39:32,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376022473] [2019-11-06 18:39:32,567 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 18:39:32,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:32,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:32,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:39:32,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:39:32,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:32,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2019-11-06 18:39:32,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358065802] [2019-11-06 18:39:32,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:39:32,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:39:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:39:32,673 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 8 states. [2019-11-06 18:39:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:32,827 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2019-11-06 18:39:32,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:39:32,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-06 18:39:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:32,828 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:39:32,829 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:39:32,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:39:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:39:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-06 18:39:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:39:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2019-11-06 18:39:32,837 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2019-11-06 18:39:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:32,837 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2019-11-06 18:39:32,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:39:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2019-11-06 18:39:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:39:32,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:32,839 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:33,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:33,048 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -31110619, now seen corresponding path program 3 times [2019-11-06 18:39:33,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:33,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777615585] [2019-11-06 18:39:33,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:39:33,166 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777615585] [2019-11-06 18:39:33,166 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068087104] [2019-11-06 18:39:33,166 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 18:39:33,229 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:39:33,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:33,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:39:33,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:39:33,241 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:33,241 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-11-06 18:39:33,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423208396] [2019-11-06 18:39:33,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:39:33,243 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:33,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:39:33,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:33,243 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 7 states. [2019-11-06 18:39:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:33,377 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-11-06 18:39:33,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:39:33,378 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-06 18:39:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:33,379 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:39:33,380 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:39:33,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:39:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:39:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-06 18:39:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:39:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-11-06 18:39:33,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 36 [2019-11-06 18:39:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:33,389 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-11-06 18:39:33,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:39:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-11-06 18:39:33,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:39:33,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:33,391 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:33,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:33,594 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1546281126, now seen corresponding path program 4 times [2019-11-06 18:39:33,595 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:33,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361764047] [2019-11-06 18:39:33,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:39:33,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361764047] [2019-11-06 18:39:33,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417891562] [2019-11-06 18:39:33,683 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 18:39:33,773 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:33,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:33,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:39:33,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-06 18:39:33,803 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:33,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-06 18:39:33,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382881454] [2019-11-06 18:39:33,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:39:33,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:33,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:39:33,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:33,805 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 10 states. [2019-11-06 18:39:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:33,953 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2019-11-06 18:39:33,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:39:33,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-06 18:39:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:33,955 INFO L225 Difference]: With dead ends: 103 [2019-11-06 18:39:33,955 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:39:33,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:39:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-11-06 18:39:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:39:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2019-11-06 18:39:33,964 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 39 [2019-11-06 18:39:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:33,964 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2019-11-06 18:39:33,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:39:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2019-11-06 18:39:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:39:33,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:33,966 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:34,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,177 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:34,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2027681847, now seen corresponding path program 5 times [2019-11-06 18:39:34,178 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:34,178 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28038175] [2019-11-06 18:39:34,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 18:39:34,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28038175] [2019-11-06 18:39:34,308 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609408285] [2019-11-06 18:39:34,308 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 [2019-11-06 18:39:34,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-06 18:39:34,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:34,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:39:34,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 18:39:34,417 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:34,417 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-11-06 18:39:34,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317717230] [2019-11-06 18:39:34,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:39:34,418 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:39:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:34,419 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 11 states. [2019-11-06 18:39:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:34,545 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2019-11-06 18:39:34,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:39:34,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-06 18:39:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:34,547 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:39:34,547 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:39:34,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:39:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:39:34,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-11-06 18:39:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:39:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-11-06 18:39:34,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 46 [2019-11-06 18:39:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:34,556 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-11-06 18:39:34,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:39:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-11-06 18:39:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:39:34,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:34,558 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:34,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,762 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:34,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2134546080, now seen corresponding path program 6 times [2019-11-06 18:39:34,763 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:34,763 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719357987] [2019-11-06 18:39:34,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:39:34,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719357987] [2019-11-06 18:39:34,906 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497189596] [2019-11-06 18:39:34,906 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:34,996 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:39:34,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:34,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:39:35,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:39:35,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:35,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-11-06 18:39:35,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337260553] [2019-11-06 18:39:35,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:39:35,022 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:39:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:35,023 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 10 states. [2019-11-06 18:39:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:35,202 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-11-06 18:39:35,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:39:35,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-11-06 18:39:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:35,204 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:39:35,205 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 18:39:35,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:39:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 18:39:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-11-06 18:39:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:39:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2019-11-06 18:39:35,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2019-11-06 18:39:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:35,213 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2019-11-06 18:39:35,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:39:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2019-11-06 18:39:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:39:35,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:35,214 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:35,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,418 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1673311115, now seen corresponding path program 7 times [2019-11-06 18:39:35,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:35,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257546575] [2019-11-06 18:39:35,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:39:35,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257546575] [2019-11-06 18:39:35,574 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840776549] [2019-11-06 18:39:35,574 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:35,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:35,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:39:35,661 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:35,661 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-06 18:39:35,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736158939] [2019-11-06 18:39:35,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:39:35,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:35,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:39:35,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:35,664 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 13 states. [2019-11-06 18:39:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:35,866 INFO L93 Difference]: Finished difference Result 133 states and 179 transitions. [2019-11-06 18:39:35,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:39:35,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2019-11-06 18:39:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:35,867 INFO L225 Difference]: With dead ends: 133 [2019-11-06 18:39:35,867 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:39:35,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:39:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-06 18:39:35,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 18:39:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2019-11-06 18:39:35,875 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 54 [2019-11-06 18:39:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:35,876 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2019-11-06 18:39:35,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:39:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2019-11-06 18:39:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:39:35,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:35,881 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:36,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:36,093 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash -5592132, now seen corresponding path program 8 times [2019-11-06 18:39:36,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:36,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991865468] [2019-11-06 18:39:36,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 18:39:36,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991865468] [2019-11-06 18:39:36,227 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193931789] [2019-11-06 18:39:36,227 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:36,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:36,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:36,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:39:36,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-06 18:39:36,350 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:36,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-11-06 18:39:36,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117050539] [2019-11-06 18:39:36,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:39:36,357 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:36,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:39:36,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:36,358 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 14 states. [2019-11-06 18:39:36,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:36,565 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2019-11-06 18:39:36,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:39:36,566 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2019-11-06 18:39:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:36,567 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:39:36,567 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:39:36,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:39:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:39:36,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-11-06 18:39:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:39:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2019-11-06 18:39:36,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 61 [2019-11-06 18:39:36,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:36,587 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2019-11-06 18:39:36,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:39:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2019-11-06 18:39:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:39:36,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:36,593 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:36,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:36,809 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1895895825, now seen corresponding path program 9 times [2019-11-06 18:39:36,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:36,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351532627] [2019-11-06 18:39:36,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:36,959 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 18:39:36,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351532627] [2019-11-06 18:39:36,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332407249] [2019-11-06 18:39:36,960 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:37,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:39:37,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:37,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:39:37,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 18:39:37,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:37,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-11-06 18:39:37,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233365196] [2019-11-06 18:39:37,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:39:37,131 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:39:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:37,132 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 13 states. [2019-11-06 18:39:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:37,395 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2019-11-06 18:39:37,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:39:37,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-11-06 18:39:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:37,397 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:39:37,397 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 18:39:37,399 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:39:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 18:39:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-11-06 18:39:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 18:39:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2019-11-06 18:39:37,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 66 [2019-11-06 18:39:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:37,411 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2019-11-06 18:39:37,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:39:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2019-11-06 18:39:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 18:39:37,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:37,413 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:37,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:37,614 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1832591302, now seen corresponding path program 10 times [2019-11-06 18:39:37,615 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:37,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986270192] [2019-11-06 18:39:37,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-06 18:39:37,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986270192] [2019-11-06 18:39:37,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231727011] [2019-11-06 18:39:37,783 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:37,848 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:37,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:37,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:39:37,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-06 18:39:37,876 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:37,876 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-06 18:39:37,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262889515] [2019-11-06 18:39:37,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:39:37,877 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:37,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:39:37,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:37,878 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 16 states. [2019-11-06 18:39:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,141 INFO L93 Difference]: Finished difference Result 163 states and 221 transitions. [2019-11-06 18:39:38,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:39:38,141 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-06 18:39:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,143 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:39:38,143 INFO L226 Difference]: Without dead ends: 102 [2019-11-06 18:39:38,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:39:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-06 18:39:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2019-11-06 18:39:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-06 18:39:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2019-11-06 18:39:38,150 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2019-11-06 18:39:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,150 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2019-11-06 18:39:38,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:39:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2019-11-06 18:39:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:39:38,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,151 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:38,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,355 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:38,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:38,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1016848565, now seen corresponding path program 11 times [2019-11-06 18:39:38,356 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:38,356 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771231932] [2019-11-06 18:39:38,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 18:39:38,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771231932] [2019-11-06 18:39:38,520 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101619754] [2019-11-06 18:39:38,520 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:38,712 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-06 18:39:38,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:38,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:39:38,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 18:39:38,731 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:38,731 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-11-06 18:39:38,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521949060] [2019-11-06 18:39:38,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:39:38,732 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:39:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:39:38,733 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 15 states. [2019-11-06 18:39:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:38,958 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2019-11-06 18:39:38,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:39:38,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-11-06 18:39:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:38,960 INFO L225 Difference]: With dead ends: 122 [2019-11-06 18:39:38,960 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 18:39:38,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:39:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 18:39:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-11-06 18:39:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:39:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2019-11-06 18:39:38,970 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 76 [2019-11-06 18:39:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:38,971 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2019-11-06 18:39:38,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:39:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2019-11-06 18:39:38,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 18:39:38,974 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:38,974 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:39,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,178 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1181057046, now seen corresponding path program 12 times [2019-11-06 18:39:39,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:39,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455843563] [2019-11-06 18:39:39,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-06 18:39:39,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455843563] [2019-11-06 18:39:39,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300567061] [2019-11-06 18:39:39,347 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:39,538 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-06 18:39:39,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:39,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:39:39,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:39:39,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:39,570 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-06 18:39:39,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329591175] [2019-11-06 18:39:39,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:39:39,571 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:39:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:39:39,572 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 18 states. [2019-11-06 18:39:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:39,835 INFO L93 Difference]: Finished difference Result 183 states and 249 transitions. [2019-11-06 18:39:39,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:39,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-06 18:39:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:39,837 INFO L225 Difference]: With dead ends: 183 [2019-11-06 18:39:39,837 INFO L226 Difference]: Without dead ends: 114 [2019-11-06 18:39:39,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:39:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-06 18:39:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2019-11-06 18:39:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-06 18:39:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2019-11-06 18:39:39,843 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 79 [2019-11-06 18:39:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:39,844 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2019-11-06 18:39:39,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:39:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2019-11-06 18:39:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-06 18:39:39,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:39,845 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:40,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,049 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2102517337, now seen corresponding path program 13 times [2019-11-06 18:39:40,050 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:40,050 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676565068] [2019-11-06 18:39:40,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-06 18:39:40,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676565068] [2019-11-06 18:39:40,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749836794] [2019-11-06 18:39:40,253 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:40,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:39:40,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-06 18:39:40,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:40,358 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 19 [2019-11-06 18:39:40,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875832446] [2019-11-06 18:39:40,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:39:40,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:40,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:39:40,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:40,360 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 19 states. [2019-11-06 18:39:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:40,657 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2019-11-06 18:39:40,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:39:40,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-11-06 18:39:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:40,659 INFO L225 Difference]: With dead ends: 193 [2019-11-06 18:39:40,659 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 18:39:40,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 18:39:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-11-06 18:39:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-06 18:39:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2019-11-06 18:39:40,666 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 86 [2019-11-06 18:39:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:40,667 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2019-11-06 18:39:40,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:39:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2019-11-06 18:39:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 18:39:40,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:40,668 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:40,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:40,872 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1364290864, now seen corresponding path program 14 times [2019-11-06 18:39:40,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:40,873 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44008954] [2019-11-06 18:39:40,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-06 18:39:41,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44008954] [2019-11-06 18:39:41,050 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960080921] [2019-11-06 18:39:41,050 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:41,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:41,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:41,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:39:41,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-06 18:39:41,163 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:41,163 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-11-06 18:39:41,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907861630] [2019-11-06 18:39:41,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:39:41,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:41,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:39:41,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:39:41,165 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 20 states. [2019-11-06 18:39:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:41,473 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2019-11-06 18:39:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:39:41,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-11-06 18:39:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:41,475 INFO L225 Difference]: With dead ends: 203 [2019-11-06 18:39:41,475 INFO L226 Difference]: Without dead ends: 126 [2019-11-06 18:39:41,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:39:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-06 18:39:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2019-11-06 18:39:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-06 18:39:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2019-11-06 18:39:41,482 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 91 [2019-11-06 18:39:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:41,482 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2019-11-06 18:39:41,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:39:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2019-11-06 18:39:41,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-06 18:39:41,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:41,484 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:41,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:41,688 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:41,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:41,689 INFO L82 PathProgramCache]: Analyzing trace with hash 213994493, now seen corresponding path program 15 times [2019-11-06 18:39:41,689 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:41,690 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508182122] [2019-11-06 18:39:41,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-06 18:39:41,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508182122] [2019-11-06 18:39:41,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496661489] [2019-11-06 18:39:41,895 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:42,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-06 18:39:42,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:42,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:39:42,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-06 18:39:42,117 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:42,117 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2019-11-06 18:39:42,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134228562] [2019-11-06 18:39:42,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:39:42,118 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:39:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:42,119 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand 19 states. [2019-11-06 18:39:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:42,378 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2019-11-06 18:39:42,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:39:42,378 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-11-06 18:39:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:42,380 INFO L225 Difference]: With dead ends: 146 [2019-11-06 18:39:42,380 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 18:39:42,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:39:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 18:39:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-06 18:39:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-06 18:39:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2019-11-06 18:39:42,387 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 96 [2019-11-06 18:39:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:42,387 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2019-11-06 18:39:42,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:39:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2019-11-06 18:39:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 18:39:42,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:42,389 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:42,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:42,594 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269518, now seen corresponding path program 16 times [2019-11-06 18:39:42,594 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:42,595 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026022946] [2019-11-06 18:39:42,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-06 18:39:42,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026022946] [2019-11-06 18:39:42,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503948162] [2019-11-06 18:39:42,846 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:42,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:42,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:42,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:39:42,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-06 18:39:42,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:42,947 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-11-06 18:39:42,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985708028] [2019-11-06 18:39:42,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:39:42,948 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:39:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:39:42,948 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand 22 states. [2019-11-06 18:39:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:43,163 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2019-11-06 18:39:43,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:39:43,163 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-11-06 18:39:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:43,164 INFO L225 Difference]: With dead ends: 223 [2019-11-06 18:39:43,164 INFO L226 Difference]: Without dead ends: 138 [2019-11-06 18:39:43,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:39:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-06 18:39:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-06 18:39:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-06 18:39:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2019-11-06 18:39:43,171 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 99 [2019-11-06 18:39:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:43,172 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2019-11-06 18:39:43,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:39:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2019-11-06 18:39:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:39:43,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:43,173 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:43,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:43,377 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1191733665, now seen corresponding path program 17 times [2019-11-06 18:39:43,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:43,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439615290] [2019-11-06 18:39:43,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-06 18:39:43,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439615290] [2019-11-06 18:39:43,618 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339899022] [2019-11-06 18:39:43,618 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:44,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-06 18:39:44,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:44,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:39:44,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-06 18:39:44,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:44,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2019-11-06 18:39:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843483726] [2019-11-06 18:39:44,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:39:44,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:39:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:39:44,438 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand 21 states. [2019-11-06 18:39:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:44,794 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2019-11-06 18:39:44,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:39:44,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-11-06 18:39:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:44,795 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:39:44,795 INFO L226 Difference]: Without dead ends: 141 [2019-11-06 18:39:44,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:39:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-06 18:39:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2019-11-06 18:39:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-06 18:39:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2019-11-06 18:39:44,802 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 106 [2019-11-06 18:39:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:44,802 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2019-11-06 18:39:44,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:39:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2019-11-06 18:39:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 18:39:44,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:44,804 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:45,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:45,010 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:45,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1387741098, now seen corresponding path program 18 times [2019-11-06 18:39:45,011 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:45,011 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820895876] [2019-11-06 18:39:45,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-06 18:39:45,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820895876] [2019-11-06 18:39:45,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834091223] [2019-11-06 18:39:45,246 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:46,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-06 18:39:46,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:46,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:39:46,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-06 18:39:46,105 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:46,105 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2019-11-06 18:39:46,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293037435] [2019-11-06 18:39:46,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:39:46,106 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:39:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:39:46,106 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand 22 states. [2019-11-06 18:39:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:46,494 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2019-11-06 18:39:46,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:39:46,494 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2019-11-06 18:39:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:46,495 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:39:46,495 INFO L226 Difference]: Without dead ends: 146 [2019-11-06 18:39:46,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:39:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-06 18:39:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2019-11-06 18:39:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-06 18:39:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2019-11-06 18:39:46,500 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 109 [2019-11-06 18:39:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:46,501 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2019-11-06 18:39:46,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:39:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2019-11-06 18:39:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:39:46,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:46,502 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:46,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:46,707 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash -510344959, now seen corresponding path program 19 times [2019-11-06 18:39:46,708 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:46,709 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169162882] [2019-11-06 18:39:46,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-11-06 18:39:46,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169162882] [2019-11-06 18:39:46,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106100680] [2019-11-06 18:39:46,985 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:47,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:39:47,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-06 18:39:47,122 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:47,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2019-11-06 18:39:47,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340934437] [2019-11-06 18:39:47,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:39:47,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:39:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:39:47,124 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 25 states. [2019-11-06 18:39:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:47,456 INFO L93 Difference]: Finished difference Result 253 states and 348 transitions. [2019-11-06 18:39:47,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:39:47,457 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2019-11-06 18:39:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:47,458 INFO L225 Difference]: With dead ends: 253 [2019-11-06 18:39:47,458 INFO L226 Difference]: Without dead ends: 156 [2019-11-06 18:39:47,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:39:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-06 18:39:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2019-11-06 18:39:47,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-06 18:39:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2019-11-06 18:39:47,465 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 112 [2019-11-06 18:39:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:47,465 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2019-11-06 18:39:47,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:39:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2019-11-06 18:39:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 18:39:47,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:47,466 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:47,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:47,667 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash 380987876, now seen corresponding path program 20 times [2019-11-06 18:39:47,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:47,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496546622] [2019-11-06 18:39:47,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-11-06 18:39:48,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496546622] [2019-11-06 18:39:48,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993076619] [2019-11-06 18:39:48,062 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:48,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:48,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:48,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:39:48,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-11-06 18:39:48,281 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:48,281 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 26 [2019-11-06 18:39:48,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073673716] [2019-11-06 18:39:48,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:39:48,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:48,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:39:48,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:39:48,286 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand 26 states. [2019-11-06 18:39:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:48,749 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2019-11-06 18:39:48,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:39:48,750 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2019-11-06 18:39:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:48,751 INFO L225 Difference]: With dead ends: 263 [2019-11-06 18:39:48,751 INFO L226 Difference]: Without dead ends: 162 [2019-11-06 18:39:48,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:39:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-06 18:39:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2019-11-06 18:39:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-06 18:39:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2019-11-06 18:39:48,759 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 121 [2019-11-06 18:39:48,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:48,759 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2019-11-06 18:39:48,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:39:48,759 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2019-11-06 18:39:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:39:48,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:48,761 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:48,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:48,965 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1860782871, now seen corresponding path program 21 times [2019-11-06 18:39:48,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:48,967 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378625004] [2019-11-06 18:39:48,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-06 18:39:49,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378625004] [2019-11-06 18:39:49,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279465105] [2019-11-06 18:39:49,321 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:50,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-06 18:39:50,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:50,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:39:50,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-06 18:39:50,180 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:50,181 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2019-11-06 18:39:50,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280336792] [2019-11-06 18:39:50,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:39:50,181 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:50,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:39:50,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:39:50,182 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand 25 states. [2019-11-06 18:39:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:50,543 INFO L93 Difference]: Finished difference Result 182 states and 238 transitions. [2019-11-06 18:39:50,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:39:50,544 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:39:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:50,545 INFO L225 Difference]: With dead ends: 182 [2019-11-06 18:39:50,545 INFO L226 Difference]: Without dead ends: 165 [2019-11-06 18:39:50,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:39:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-06 18:39:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-11-06 18:39:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-06 18:39:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2019-11-06 18:39:50,553 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 126 [2019-11-06 18:39:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:50,553 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2019-11-06 18:39:50,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:39:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2019-11-06 18:39:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 18:39:50,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:50,555 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:50,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:50,761 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1210175330, now seen corresponding path program 22 times [2019-11-06 18:39:50,762 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:50,762 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766650825] [2019-11-06 18:39:50,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-06 18:39:51,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766650825] [2019-11-06 18:39:51,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945727263] [2019-11-06 18:39:51,190 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:51,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:39:51,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:51,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:39:51,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-11-06 18:39:51,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:51,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2019-11-06 18:39:51,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095599686] [2019-11-06 18:39:51,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:39:51,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:39:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:39:51,370 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand 28 states. [2019-11-06 18:39:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:51,735 INFO L93 Difference]: Finished difference Result 283 states and 389 transitions. [2019-11-06 18:39:51,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:39:51,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2019-11-06 18:39:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:51,737 INFO L225 Difference]: With dead ends: 283 [2019-11-06 18:39:51,737 INFO L226 Difference]: Without dead ends: 174 [2019-11-06 18:39:51,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:39:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-06 18:39:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2019-11-06 18:39:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-06 18:39:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2019-11-06 18:39:51,747 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 129 [2019-11-06 18:39:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:51,747 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2019-11-06 18:39:51,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:39:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2019-11-06 18:39:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 18:39:51,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:51,748 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:51,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:51,953 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:51,954 INFO L82 PathProgramCache]: Analyzing trace with hash 697983629, now seen corresponding path program 23 times [2019-11-06 18:39:51,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:51,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628514754] [2019-11-06 18:39:51,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 18:39:52,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628514754] [2019-11-06 18:39:52,329 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295687163] [2019-11-06 18:39:52,329 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:53,722 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-11-06 18:39:53,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:53,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:39:53,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 18:39:53,769 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:53,769 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2019-11-06 18:39:53,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083324875] [2019-11-06 18:39:53,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:39:53,770 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:53,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:39:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:39:53,770 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 27 states. [2019-11-06 18:39:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:54,178 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2019-11-06 18:39:54,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:39:54,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-11-06 18:39:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:54,180 INFO L225 Difference]: With dead ends: 194 [2019-11-06 18:39:54,181 INFO L226 Difference]: Without dead ends: 177 [2019-11-06 18:39:54,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:39:54,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-06 18:39:54,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2019-11-06 18:39:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-06 18:39:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 228 transitions. [2019-11-06 18:39:54,189 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 228 transitions. Word has length 136 [2019-11-06 18:39:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:54,190 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 228 transitions. [2019-11-06 18:39:54,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:39:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 228 transitions. [2019-11-06 18:39:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 18:39:54,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:54,191 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:54,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:54,399 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1951559874, now seen corresponding path program 24 times [2019-11-06 18:39:54,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:54,400 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248098626] [2019-11-06 18:39:54,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-06 18:39:54,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248098626] [2019-11-06 18:39:54,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641396504] [2019-11-06 18:39:54,785 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:56,345 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-11-06 18:39:56,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:56,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:39:56,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-11-06 18:39:56,391 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:56,391 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2019-11-06 18:39:56,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524976827] [2019-11-06 18:39:56,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:39:56,392 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:39:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:39:56,392 INFO L87 Difference]: Start difference. First operand 174 states and 228 transitions. Second operand 30 states. [2019-11-06 18:39:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:56,738 INFO L93 Difference]: Finished difference Result 303 states and 417 transitions. [2019-11-06 18:39:56,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:39:56,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-06 18:39:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:56,740 INFO L225 Difference]: With dead ends: 303 [2019-11-06 18:39:56,740 INFO L226 Difference]: Without dead ends: 186 [2019-11-06 18:39:56,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:39:56,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-11-06 18:39:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2019-11-06 18:39:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-06 18:39:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2019-11-06 18:39:56,750 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 139 [2019-11-06 18:39:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:56,750 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2019-11-06 18:39:56,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:39:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2019-11-06 18:39:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:39:56,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:56,752 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:56,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:56,958 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash -965820367, now seen corresponding path program 25 times [2019-11-06 18:39:56,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:56,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235513536] [2019-11-06 18:39:56,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-06 18:39:57,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235513536] [2019-11-06 18:39:57,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135966841] [2019-11-06 18:39:57,399 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:57,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:39:57,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-11-06 18:39:57,538 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:57,538 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 31 [2019-11-06 18:39:57,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298865654] [2019-11-06 18:39:57,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:39:57,539 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:39:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:39:57,540 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 31 states. [2019-11-06 18:39:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:57,998 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2019-11-06 18:39:57,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:39:57,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2019-11-06 18:39:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:58,000 INFO L225 Difference]: With dead ends: 313 [2019-11-06 18:39:58,000 INFO L226 Difference]: Without dead ends: 192 [2019-11-06 18:39:58,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:39:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-06 18:39:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-11-06 18:39:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-06 18:39:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 246 transitions. [2019-11-06 18:39:58,008 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 246 transitions. Word has length 146 [2019-11-06 18:39:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:58,008 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 246 transitions. [2019-11-06 18:39:58,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:39:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 246 transitions. [2019-11-06 18:39:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 18:39:58,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:58,010 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:58,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:58,214 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1865518856, now seen corresponding path program 26 times [2019-11-06 18:39:58,214 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:58,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854591448] [2019-11-06 18:39:58,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-11-06 18:39:58,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854591448] [2019-11-06 18:39:58,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822339462] [2019-11-06 18:39:58,713 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:58,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:58,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:58,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:39:58,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-11-06 18:39:58,883 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:58,883 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-11-06 18:39:58,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388262602] [2019-11-06 18:39:58,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:39:58,883 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:39:58,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:39:58,884 INFO L87 Difference]: Start difference. First operand 188 states and 246 transitions. Second operand 32 states. [2019-11-06 18:39:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:59,468 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2019-11-06 18:39:59,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:39:59,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2019-11-06 18:39:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:59,471 INFO L225 Difference]: With dead ends: 323 [2019-11-06 18:39:59,471 INFO L226 Difference]: Without dead ends: 198 [2019-11-06 18:39:59,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:39:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-06 18:39:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2019-11-06 18:39:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-06 18:39:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2019-11-06 18:39:59,484 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 151 [2019-11-06 18:39:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:59,485 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2019-11-06 18:39:59,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:39:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2019-11-06 18:39:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 18:39:59,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:59,486 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:59,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:59,690 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1815219669, now seen corresponding path program 27 times [2019-11-06 18:39:59,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:59,691 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969242092] [2019-11-06 18:39:59,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-06 18:40:00,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969242092] [2019-11-06 18:40:00,361 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514593039] [2019-11-06 18:40:00,361 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:03,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-06 18:40:03,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:03,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:40:03,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-06 18:40:03,569 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:03,569 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2019-11-06 18:40:03,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918399631] [2019-11-06 18:40:03,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:40:03,570 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:03,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:40:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:40:03,571 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 31 states. [2019-11-06 18:40:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:03,963 INFO L93 Difference]: Finished difference Result 218 states and 286 transitions. [2019-11-06 18:40:03,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:40:03,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-11-06 18:40:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:03,966 INFO L225 Difference]: With dead ends: 218 [2019-11-06 18:40:03,966 INFO L226 Difference]: Without dead ends: 201 [2019-11-06 18:40:03,967 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:40:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-06 18:40:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2019-11-06 18:40:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-06 18:40:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2019-11-06 18:40:03,973 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 156 [2019-11-06 18:40:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:03,974 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2019-11-06 18:40:03,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:40:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2019-11-06 18:40:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-06 18:40:03,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:03,975 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:04,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:04,181 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -74268938, now seen corresponding path program 28 times [2019-11-06 18:40:04,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:04,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449338250] [2019-11-06 18:40:04,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-06 18:40:04,674 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449338250] [2019-11-06 18:40:04,674 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275189738] [2019-11-06 18:40:04,675 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:04,845 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:40:04,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:04,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:40:04,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-11-06 18:40:04,892 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:04,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2019-11-06 18:40:04,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390475610] [2019-11-06 18:40:04,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 18:40:04,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 18:40:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:40:04,895 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 34 states. [2019-11-06 18:40:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:05,375 INFO L93 Difference]: Finished difference Result 343 states and 473 transitions. [2019-11-06 18:40:05,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 18:40:05,376 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 159 [2019-11-06 18:40:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:05,377 INFO L225 Difference]: With dead ends: 343 [2019-11-06 18:40:05,378 INFO L226 Difference]: Without dead ends: 210 [2019-11-06 18:40:05,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:40:05,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-06 18:40:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2019-11-06 18:40:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-06 18:40:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2019-11-06 18:40:05,385 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 159 [2019-11-06 18:40:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:05,385 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2019-11-06 18:40:05,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 18:40:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2019-11-06 18:40:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:40:05,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:05,387 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:05,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:05,591 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2046987129, now seen corresponding path program 29 times [2019-11-06 18:40:05,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:05,592 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338790950] [2019-11-06 18:40:05,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-11-06 18:40:06,161 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338790950] [2019-11-06 18:40:06,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493398445] [2019-11-06 18:40:06,162 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:08,510 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-11-06 18:40:08,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:40:08,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-06 18:40:08,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:40:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2019-11-06 18:40:08,547 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:40:08,547 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 35 [2019-11-06 18:40:08,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072311567] [2019-11-06 18:40:08,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:40:08,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:40:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:40:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:40:08,549 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand 35 states. [2019-11-06 18:40:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:40:09,100 INFO L93 Difference]: Finished difference Result 353 states and 486 transitions. [2019-11-06 18:40:09,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:40:09,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2019-11-06 18:40:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:40:09,102 INFO L225 Difference]: With dead ends: 353 [2019-11-06 18:40:09,103 INFO L226 Difference]: Without dead ends: 216 [2019-11-06 18:40:09,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:40:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-06 18:40:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2019-11-06 18:40:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-06 18:40:09,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2019-11-06 18:40:09,112 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 166 [2019-11-06 18:40:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:40:09,113 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2019-11-06 18:40:09,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:40:09,113 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2019-11-06 18:40:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 18:40:09,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:40:09,114 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:40:09,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:40:09,322 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:40:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:40:09,322 INFO L82 PathProgramCache]: Analyzing trace with hash 710272432, now seen corresponding path program 30 times [2019-11-06 18:40:09,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:40:09,322 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555910947] [2019-11-06 18:40:09,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:40:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:40:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-11-06 18:40:10,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555910947] [2019-11-06 18:40:10,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780607561] [2019-11-06 18:40:10,054 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true