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-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:42:43,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:42:43,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:42:43,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:42:43,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:42:43,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:42:43,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:42:43,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:42:43,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:42:43,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:42:43,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:42:43,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:42:43,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:42:43,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:42:43,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:42:43,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:42:43,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:42:43,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:42:43,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:42:43,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:42:43,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:42:43,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:42:43,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:42:43,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:42:43,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:42:43,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:42:43,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:42:43,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:42:43,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:42:43,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:42:43,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:42:43,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:42:43,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:42:43,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:42:43,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:42:43,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:42:43,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:42:43,812 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:42:43,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:42:43,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:42:43,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:42:43,817 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:42:43,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:42:43,817 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:42:43,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:42:43,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:42:43,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:42:43,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:42:43,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:42:43,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:42:43,819 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:42:43,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:42:43,820 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:42:43,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:42:43,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:42:43,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:42:43,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:42:43,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:42:43,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:43,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:42:43,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:42:43,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:42:43,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:42:43,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:42:43,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:42:43,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:42:44,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:42:44,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:42:44,108 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:42:44,110 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:42:44,110 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:42:44,111 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-13 17:42:44,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d6fbc17/97fdeca761ce4115a1133b24efbc8a04/FLAGb6f802bfd [2019-10-13 17:42:44,660 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:42:44,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-13 17:42:44,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d6fbc17/97fdeca761ce4115a1133b24efbc8a04/FLAGb6f802bfd [2019-10-13 17:42:45,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d6fbc17/97fdeca761ce4115a1133b24efbc8a04 [2019-10-13 17:42:45,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:42:45,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:42:45,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:45,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:42:45,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:42:45,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa06041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45, skipping insertion in model container [2019-10-13 17:42:45,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,075 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:42:45,096 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:42:45,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:45,321 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:42:45,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:42:45,360 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:42:45,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45 WrapperNode [2019-10-13 17:42:45,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:42:45,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:42:45,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:42:45,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:42:45,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... [2019-10-13 17:42:45,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:42:45,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:42:45,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:42:45,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:42:45,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:42:45,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:42:45,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:42:45,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:42:45,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:42:45,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 17:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:42:45,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:42:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:42:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:42:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:42:45,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:42:45,920 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:42:45,920 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 17:42:45,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:45 BoogieIcfgContainer [2019-10-13 17:42:45,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:42:45,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:42:45,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:42:45,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:42:45,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:42:45" (1/3) ... [2019-10-13 17:42:45,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa7a96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:45, skipping insertion in model container [2019-10-13 17:42:45,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:42:45" (2/3) ... [2019-10-13 17:42:45,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa7a96e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:42:45, skipping insertion in model container [2019-10-13 17:42:45,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:42:45" (3/3) ... [2019-10-13 17:42:45,932 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2019-10-13 17:42:45,942 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:42:45,949 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:42:45,961 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:42:45,985 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:42:45,985 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:42:45,985 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:42:45,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:42:45,985 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:42:45,985 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:42:45,985 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:42:45,985 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:42:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-13 17:42:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:42:46,010 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,011 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,013 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,017 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-10-13 17:42:46,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709288092] [2019-10-13 17:42:46,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:46,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709288092] [2019-10-13 17:42:46,212 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:46,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:42:46,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433871475] [2019-10-13 17:42:46,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:42:46,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:42:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:46,236 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-13 17:42:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,419 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-10-13 17:42:46,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:42:46,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 17:42:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,433 INFO L225 Difference]: With dead ends: 81 [2019-10-13 17:42:46,433 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:42:46,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:42:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:42:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 17:42:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:42:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-13 17:42:46,500 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-13 17:42:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,501 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-13 17:42:46,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:42:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-13 17:42:46,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:42:46,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,503 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,503 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,504 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-10-13 17:42:46,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203873823] [2019-10-13 17:42:46,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:46,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203873823] [2019-10-13 17:42:46,667 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:46,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:42:46,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985121787] [2019-10-13 17:42:46,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:42:46,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:46,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:42:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:46,671 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-10-13 17:42:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:46,906 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-13 17:42:46,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:46,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-13 17:42:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:46,909 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:42:46,909 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:42:46,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:42:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-13 17:42:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:42:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-13 17:42:46,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-13 17:42:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:46,923 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-13 17:42:46,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:42:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-13 17:42:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:42:46,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:46,925 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:46,925 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:46,926 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-10-13 17:42:46,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:46,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273209677] [2019-10-13 17:42:46,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,927 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:46,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:42:47,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273209677] [2019-10-13 17:42:47,036 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:47,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:42:47,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358783249] [2019-10-13 17:42:47,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:42:47,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:47,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:42:47,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:47,039 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-10-13 17:42:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:47,194 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-13 17:42:47,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:42:47,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 17:42:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:47,196 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:42:47,196 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:42:47,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:42:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:42:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-13 17:42:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 17:42:47,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-13 17:42:47,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-13 17:42:47,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:47,212 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-13 17:42:47,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:42:47,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-13 17:42:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:42:47,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:47,214 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:47,214 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:47,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:47,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-10-13 17:42:47,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:47,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470894511] [2019-10-13 17:42:47,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:42:47,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470894511] [2019-10-13 17:42:47,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:42:47,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:42:47,310 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424047038] [2019-10-13 17:42:47,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:42:47,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:42:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:42:47,312 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-10-13 17:42:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:47,455 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-13 17:42:47,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:47,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-13 17:42:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:47,457 INFO L225 Difference]: With dead ends: 95 [2019-10-13 17:42:47,457 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 17:42:47,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:42:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 17:42:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-13 17:42:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:42:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-13 17:42:47,466 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-13 17:42:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:47,466 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-13 17:42:47,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:42:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-13 17:42:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 17:42:47,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:47,468 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:47,468 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-10-13 17:42:47,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:47,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872355607] [2019-10-13 17:42:47,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:47,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:42:47,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872355607] [2019-10-13 17:42:47,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13054342] [2019-10-13 17:42:47,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:47,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:47,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:42:47,726 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:47,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:42:47,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4539217] [2019-10-13 17:42:47,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:42:47,729 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:42:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:47,730 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-10-13 17:42:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:48,037 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-13 17:42:48,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:42:48,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-13 17:42:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:48,040 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:42:48,040 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:42:48,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:42:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:42:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-13 17:42:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:42:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-13 17:42:48,049 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-10-13 17:42:48,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:48,049 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-13 17:42:48,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:42:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-13 17:42:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 17:42:48,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:48,052 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:48,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:48,263 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 589604962, now seen corresponding path program 2 times [2019-10-13 17:42:48,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:48,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226856133] [2019-10-13 17:42:48,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:48,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:48,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 17:42:48,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226856133] [2019-10-13 17:42:48,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022906759] [2019-10-13 17:42:48,408 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:48,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:42:48,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:48,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:42:48,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 17:42:48,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:48,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 17:42:48,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950768460] [2019-10-13 17:42:48,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:42:48,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:48,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:42:48,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:42:48,536 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-10-13 17:42:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:42:48,758 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2019-10-13 17:42:48,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:42:48,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-10-13 17:42:48,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:42:48,759 INFO L225 Difference]: With dead ends: 107 [2019-10-13 17:42:48,759 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:42:48,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:42:48,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:42:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-10-13 17:42:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:42:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-13 17:42:48,768 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-10-13 17:42:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:42:48,769 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-13 17:42:48,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:42:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-13 17:42:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-13 17:42:48,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:42:48,770 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:42:48,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:48,975 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:42:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:42:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1474058926, now seen corresponding path program 3 times [2019-10-13 17:42:48,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:42:48,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244992367] [2019-10-13 17:42:48,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:48,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:42:48,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:42:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:42:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:52,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244992367] [2019-10-13 17:42:52,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554691307] [2019-10-13 17:42:52,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:42:52,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:42:52,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:42:52,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-13 17:42:52,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:42:57,437 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:57,438 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-10-13 17:42:57,439 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-13 17:42:57,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:42:57,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:57,456 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-13 17:42:57,457 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-10-13 17:42:57,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:57,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:57,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:42:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:42:57,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:42:57,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 89 [2019-10-13 17:42:57,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790918532] [2019-10-13 17:42:57,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-13 17:42:57,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:42:57,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-13 17:42:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=7533, Unknown=0, NotChecked=0, Total=7832 [2019-10-13 17:42:57,982 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 89 states. [2019-10-13 17:43:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:12,792 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2019-10-13 17:43:12,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-10-13 17:43:12,793 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 64 [2019-10-13 17:43:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:12,795 INFO L225 Difference]: With dead ends: 174 [2019-10-13 17:43:12,796 INFO L226 Difference]: Without dead ends: 168 [2019-10-13 17:43:12,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=718, Invalid=17372, Unknown=0, NotChecked=0, Total=18090 [2019-10-13 17:43:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-13 17:43:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2019-10-13 17:43:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-13 17:43:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2019-10-13 17:43:12,816 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2019-10-13 17:43:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:12,817 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2019-10-13 17:43:12,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-10-13 17:43:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2019-10-13 17:43:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:43:12,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:12,819 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:13,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,023 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1815286352, now seen corresponding path program 4 times [2019-10-13 17:43:13,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:13,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674139989] [2019-10-13 17:43:13,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:13,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 17:43:13,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674139989] [2019-10-13 17:43:13,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139621070] [2019-10-13 17:43:13,119 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:13,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:13,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:13,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:13,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-13 17:43:13,271 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:13,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:43:13,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701056298] [2019-10-13 17:43:13,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:13,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:13,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:13,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:13,273 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 14 states. [2019-10-13 17:43:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:13,916 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2019-10-13 17:43:13,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:43:13,917 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:43:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:13,922 INFO L225 Difference]: With dead ends: 237 [2019-10-13 17:43:13,922 INFO L226 Difference]: Without dead ends: 139 [2019-10-13 17:43:13,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-13 17:43:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2019-10-13 17:43:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:43:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-10-13 17:43:13,937 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2019-10-13 17:43:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:13,937 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-10-13 17:43:13,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-10-13 17:43:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:43:13,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:13,939 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:14,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:14,148 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1556829298, now seen corresponding path program 5 times [2019-10-13 17:43:14,150 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:14,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570714646] [2019-10-13 17:43:14,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,151 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:14,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 17:43:14,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570714646] [2019-10-13 17:43:14,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942748974] [2019-10-13 17:43:14,252 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 [2019-10-13 17:43:14,469 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 17:43:14,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:14,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:14,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 17:43:14,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:14,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:43:14,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054828633] [2019-10-13 17:43:14,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:14,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:14,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:14,548 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2019-10-13 17:43:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:14,973 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-10-13 17:43:14,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:14,974 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-10-13 17:43:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:14,975 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:43:14,976 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 17:43:14,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 17:43:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-13 17:43:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:43:14,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2019-10-13 17:43:14,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2019-10-13 17:43:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:14,997 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2019-10-13 17:43:14,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:14,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2019-10-13 17:43:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:43:15,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:15,004 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:15,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:15,218 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:15,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:15,219 INFO L82 PathProgramCache]: Analyzing trace with hash 249886016, now seen corresponding path program 6 times [2019-10-13 17:43:15,220 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:15,220 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584095948] [2019-10-13 17:43:15,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:15,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:16,385 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2019-10-13 17:43:16,875 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-13 17:43:17,014 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2019-10-13 17:43:17,489 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2019-10-13 17:43:17,695 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-10-13 17:43:17,893 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-13 17:43:18,094 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2019-10-13 17:43:18,250 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2019-10-13 17:43:18,688 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-13 17:43:18,856 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-10-13 17:43:19,027 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-10-13 17:43:19,248 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-10-13 17:43:19,428 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-10-13 17:43:19,633 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-10-13 17:43:20,238 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2019-10-13 17:43:20,425 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2019-10-13 17:43:20,644 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-13 17:43:20,890 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-10-13 17:43:21,100 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2019-10-13 17:43:21,432 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2019-10-13 17:43:21,632 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2019-10-13 17:43:21,862 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2019-10-13 17:43:22,084 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2019-10-13 17:43:22,302 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-10-13 17:43:22,563 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-10-13 17:43:22,761 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2019-10-13 17:43:23,329 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2019-10-13 17:43:23,520 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2019-10-13 17:43:23,727 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-13 17:43:23,941 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-10-13 17:43:24,175 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-10-13 17:43:25,791 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38