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_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:37,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:37,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:37,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:37,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:37,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:37,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:37,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:37,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:37,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:37,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:37,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:37,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:37,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:37,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:37,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:37,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:37,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:37,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:37,857 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:37,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:37,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:37,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:37,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:37,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:37,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:37,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:37,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:37,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:37,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:37,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:37,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:37,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:37,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:37,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:37,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:37,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:41:37,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:37,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:37,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:37,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:37,904 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:37,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:37,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:37,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:37,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:37,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:37,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:37,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:37,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:37,906 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:37,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:37,906 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:37,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:37,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:37,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:37,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:37,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:37,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:37,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:37,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:37,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:37,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:37,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:37,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:37,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:38,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:38,239 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:38,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:38,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:38,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:38,246 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-10-14 21:41:38,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d756c90/edda23f81cf84bfeba99c5245dac4fd1/FLAGc1d4ecefd [2019-10-14 21:41:38,768 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:38,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-10-14 21:41:38,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d756c90/edda23f81cf84bfeba99c5245dac4fd1/FLAGc1d4ecefd [2019-10-14 21:41:39,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d756c90/edda23f81cf84bfeba99c5245dac4fd1 [2019-10-14 21:41:39,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:39,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:39,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:39,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:39,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:39,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39, skipping insertion in model container [2019-10-14 21:41:39,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,169 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:39,189 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:39,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:39,469 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:39,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:39,531 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:39,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39 WrapperNode [2019-10-14 21:41:39,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:39,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:39,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:39,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:39,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... [2019-10-14 21:41:39,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:39,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:39,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:39,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:39,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:39,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:39,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:39,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:39,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:39,744 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:39,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:39,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:40,011 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:40,012 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:41:40,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:40 BoogieIcfgContainer [2019-10-14 21:41:40,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:40,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:40,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:40,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:40,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:39" (1/3) ... [2019-10-14 21:41:40,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46dbb45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:40, skipping insertion in model container [2019-10-14 21:41:40,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:39" (2/3) ... [2019-10-14 21:41:40,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46dbb45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:40, skipping insertion in model container [2019-10-14 21:41:40,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:40" (3/3) ... [2019-10-14 21:41:40,021 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2019-10-14 21:41:40,032 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:40,041 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:40,055 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:40,091 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:40,092 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:40,092 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:40,092 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:40,092 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:40,092 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:40,093 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:40,093 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 21:41:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:41:40,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:40,144 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] [2019-10-14 21:41:40,146 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash -720839896, now seen corresponding path program 1 times [2019-10-14 21:41:40,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:40,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567554179] [2019-10-14 21:41:40,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:40,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567554179] [2019-10-14 21:41:40,346 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:40,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:40,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170054894] [2019-10-14 21:41:40,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:40,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:40,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:40,368 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-10-14 21:41:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:40,465 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2019-10-14 21:41:40,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:40,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 21:41:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:40,476 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:41:40,476 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:41:40,479 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:41:40,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:41:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:41:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:41:40,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-14 21:41:40,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:40,524 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:41:40,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:40,524 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:41:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:41:40,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:40,526 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] [2019-10-14 21:41:40,526 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1191176598, now seen corresponding path program 1 times [2019-10-14 21:41:40,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:40,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734007978] [2019-10-14 21:41:40,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:40,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734007978] [2019-10-14 21:41:40,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:40,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:40,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849566837] [2019-10-14 21:41:40,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:40,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:40,667 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-10-14 21:41:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:40,835 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-14 21:41:40,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:40,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:41:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:40,837 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:41:40,837 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:41:40,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:41:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 21:41:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-14 21:41:40,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-10-14 21:41:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:40,854 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-14 21:41:40,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-14 21:41:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:41:40,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:40,856 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] [2019-10-14 21:41:40,856 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash -988852588, now seen corresponding path program 1 times [2019-10-14 21:41:40,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:40,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141360652] [2019-10-14 21:41:40,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:40,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:40,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141360652] [2019-10-14 21:41:40,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:40,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:40,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418636839] [2019-10-14 21:41:40,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:40,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:40,974 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2019-10-14 21:41:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:41,089 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-14 21:41:41,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:41,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:41:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:41,091 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:41:41,091 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:41:41,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:41:41,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 21:41:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:41:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-14 21:41:41,099 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-10-14 21:41:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:41,100 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-14 21:41:41,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-14 21:41:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:41:41,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:41,102 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] [2019-10-14 21:41:41,102 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1991586542, now seen corresponding path program 1 times [2019-10-14 21:41:41,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:41,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064307376] [2019-10-14 21:41:41,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:41,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064307376] [2019-10-14 21:41:41,202 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:41,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:41,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050730431] [2019-10-14 21:41:41,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:41,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:41,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:41,204 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-10-14 21:41:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:41,342 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-14 21:41:41,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:41,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:41:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:41,343 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:41:41,344 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:41:41,344 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 [2019-10-14 21:41:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:41:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-10-14 21:41:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:41:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-14 21:41:41,351 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-10-14 21:41:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:41,352 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-14 21:41:41,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-14 21:41:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:41:41,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:41,353 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] [2019-10-14 21:41:41,354 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1169709580, now seen corresponding path program 1 times [2019-10-14 21:41:41,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:41,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647835823] [2019-10-14 21:41:41,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:41:41,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647835823] [2019-10-14 21:41:41,452 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048751829] [2019-10-14 21:41:41,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:41,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:41,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:41:41,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:41,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:41,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484094849] [2019-10-14 21:41:41,589 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:41,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:41,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:41,591 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-10-14 21:41:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:41,775 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-10-14 21:41:41,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:41,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-14 21:41:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:41,776 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:41:41,776 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:41:41,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:41:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 21:41:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:41:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-14 21:41:41,783 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2019-10-14 21:41:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:41,783 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-14 21:41:41,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-14 21:41:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:41,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:41,785 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] [2019-10-14 21:41:41,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:41,990 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1195670154, now seen corresponding path program 2 times [2019-10-14 21:41:41,991 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:41,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577466194] [2019-10-14 21:41:41,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:41,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:41:42,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577466194] [2019-10-14 21:41:42,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480645441] [2019-10-14 21:41:42,126 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:42,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:42,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:42,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:42,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:41:42,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:42,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:42,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77987915] [2019-10-14 21:41:42,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:42,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:42,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:42,236 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-10-14 21:41:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:42,409 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-10-14 21:41:42,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:42,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-10-14 21:41:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:42,410 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:41:42,410 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:41:42,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:41:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-10-14 21:41:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:41:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 21:41:42,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-10-14 21:41:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:42,419 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 21:41:42,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 21:41:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:41:42,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:42,421 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:42,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:42,635 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash -187044094, now seen corresponding path program 3 times [2019-10-14 21:41:42,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:42,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766319979] [2019-10-14 21:41:42,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:42,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:42,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:43,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766319979] [2019-10-14 21:41:43,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964804924] [2019-10-14 21:41:43,700 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:43,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:43,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:43,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2019-10-14 21:41:43,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:43,881 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:41:43,882 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:43,893 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:43,894 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:43,894 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-14 21:41:45,002 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:41:45,017 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:45,017 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-10-14 21:41:45,018 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:45,051 INFO L567 ElimStorePlain]: treesize reduction 15, result has 71.7 percent of original size [2019-10-14 21:41:45,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:45,055 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:45,056 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2019-10-14 21:41:45,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:45,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:45,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:45,329 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:45,329 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2019-10-14 21:41:45,329 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486984069] [2019-10-14 21:41:45,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 21:41:45,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 21:41:45,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 21:41:45,331 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 40 states. [2019-10-14 21:41:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:47,496 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-10-14 21:41:47,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:41:47,497 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2019-10-14 21:41:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:47,498 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:41:47,498 INFO L226 Difference]: Without dead ends: 92 [2019-10-14 21:41:47,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:41:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-14 21:41:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2019-10-14 21:41:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:41:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-10-14 21:41:47,511 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2019-10-14 21:41:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:47,511 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-10-14 21:41:47,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 21:41:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-10-14 21:41:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:41:47,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:47,513 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 21:41:47,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:47,725 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:47,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:47,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1685956864, now seen corresponding path program 4 times [2019-10-14 21:41:47,726 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:47,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981092023] [2019-10-14 21:41:47,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,727 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:47,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981092023] [2019-10-14 21:41:47,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043202078] [2019-10-14 21:41:47,821 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:47,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:47,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:47,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:47,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:41:47,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:47,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:47,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587244618] [2019-10-14 21:41:47,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:47,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:47,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:47,927 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2019-10-14 21:41:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:48,237 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2019-10-14 21:41:48,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:48,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-14 21:41:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:48,241 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:41:48,241 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:41:48,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:41:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2019-10-14 21:41:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:41:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-10-14 21:41:48,270 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2019-10-14 21:41:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:48,270 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-10-14 21:41:48,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-10-14 21:41:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:41:48,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:48,272 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 21:41:48,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:48,478 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:48,478 INFO L82 PathProgramCache]: Analyzing trace with hash 19991870, now seen corresponding path program 5 times [2019-10-14 21:41:48,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:48,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323131729] [2019-10-14 21:41:48,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:41:48,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323131729] [2019-10-14 21:41:48,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173332740] [2019-10-14 21:41:48,575 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 [2019-10-14 21:41:48,685 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:48,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:48,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:48,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:41:48,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:48,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:48,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846365762] [2019-10-14 21:41:48,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:48,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:48,745 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-10-14 21:41:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:49,055 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2019-10-14 21:41:49,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:49,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-10-14 21:41:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:49,056 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:41:49,056 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:49,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-14 21:41:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:41:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-14 21:41:49,065 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2019-10-14 21:41:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:49,065 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-14 21:41:49,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-14 21:41:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:41:49,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:49,067 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:41:49,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:49,271 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:49,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:49,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1936263288, now seen corresponding path program 6 times [2019-10-14 21:41:49,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:49,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276723704] [2019-10-14 21:41:49,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:49,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:50,520 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-14 21:41:50,676 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-10-14 21:41:51,655 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-10-14 21:41:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:53,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276723704] [2019-10-14 21:41:53,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472065060] [2019-10-14 21:41:53,728 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 [2019-10-14 21:41:53,787 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:41:53,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:53,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-14 21:41:53,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:53,920 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:41:53,920 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:41:53,927 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:53,928 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:41:53,928 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:41:55,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:55,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:55,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 28] total 68 [2019-10-14 21:41:55,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899488856] [2019-10-14 21:41:55,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-14 21:41:55,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-14 21:41:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=4167, Unknown=0, NotChecked=0, Total=4556 [2019-10-14 21:41:55,428 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 68 states. [2019-10-14 21:41:56,993 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2019-10-14 21:41:57,866 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2019-10-14 21:41:58,548 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 35 [2019-10-14 21:41:58,991 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 38 [2019-10-14 21:41:59,365 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2019-10-14 21:42:02,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:02,897 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2019-10-14 21:42:02,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:42:02,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 50 [2019-10-14 21:42:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:02,899 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:42:02,899 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:42:02,904 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1117, Invalid=10013, Unknown=0, NotChecked=0, Total=11130 [2019-10-14 21:42:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:42:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2019-10-14 21:42:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:42:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2019-10-14 21:42:02,916 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 50 [2019-10-14 21:42:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:02,917 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2019-10-14 21:42:02,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-14 21:42:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2019-10-14 21:42:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:42:02,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:02,918 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 21:42:03,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:03,122 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:03,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:03,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2074885366, now seen corresponding path program 7 times [2019-10-14 21:42:03,123 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:03,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372913620] [2019-10-14 21:42:03,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,124 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:03,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372913620] [2019-10-14 21:42:03,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684477509] [2019-10-14 21:42:03,216 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 [2019-10-14 21:42:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:03,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:42:03,347 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:03,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:42:03,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819336573] [2019-10-14 21:42:03,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:03,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:03,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:03,349 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 17 states. [2019-10-14 21:42:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:03,727 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2019-10-14 21:42:03,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:03,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2019-10-14 21:42:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:03,729 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:42:03,729 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 21:42:03,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 21:42:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2019-10-14 21:42:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:42:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2019-10-14 21:42:03,742 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 52 [2019-10-14 21:42:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:03,742 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2019-10-14 21:42:03,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2019-10-14 21:42:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:42:03,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:03,744 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2019-10-14 21:42:03,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:03,955 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash 155810740, now seen corresponding path program 8 times [2019-10-14 21:42:03,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:03,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835216706] [2019-10-14 21:42:03,956 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,956 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:03,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:42:04,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835216706] [2019-10-14 21:42:04,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455062596] [2019-10-14 21:42:04,066 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 [2019-10-14 21:42:04,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:04,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:04,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:04,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:42:04,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:04,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-14 21:42:04,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580706194] [2019-10-14 21:42:04,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:04,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:04,226 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 17 states. [2019-10-14 21:42:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:04,645 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2019-10-14 21:42:04,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:04,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-10-14 21:42:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:04,646 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:42:04,646 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:42:04,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:42:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2019-10-14 21:42:04,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:42:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-14 21:42:04,655 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2019-10-14 21:42:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:04,655 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-14 21:42:04,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-14 21:42:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:04,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:04,656 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:04,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:04,862 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1133377938, now seen corresponding path program 9 times [2019-10-14 21:42:04,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:04,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622156986] [2019-10-14 21:42:04,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:04,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:05,982 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-14 21:42:06,181 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-14 21:42:06,364 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-14 21:42:06,554 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-10-14 21:42:06,792 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-10-14 21:42:06,968 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-10-14 21:42:07,110 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-10-14 21:42:07,517 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2019-10-14 21:42:07,680 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2019-10-14 21:42:07,870 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2019-10-14 21:42:08,073 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2019-10-14 21:42:08,255 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-10-14 21:42:08,460 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-10-14 21:42:08,642 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2019-10-14 21:42:08,789 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2019-10-14 21:42:08,951 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-10-14 21:42:09,132 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-14 21:42:09,309 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2019-10-14 21:42:09,491 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-10-14 21:42:09,708 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-10-14 21:42:09,907 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2019-10-14 21:42:10,078 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-14 21:42:10,266 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-10-14 21:42:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:11,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622156986] [2019-10-14 21:42:11,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953164333] [2019-10-14 21:42:11,785 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 [2019-10-14 21:42:11,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 21:42:11,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:11,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 88 conjunts are in the unsatisfiable core [2019-10-14 21:42:11,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:11,964 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:42:11,965 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:11,975 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:11,975 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:11,976 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:42:14,434 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,435 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,436 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,441 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,442 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:14,443 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:42:14,465 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:14,466 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 65 [2019-10-14 21:42:14,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,471 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,474 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-10-14 21:42:14,521 INFO L567 ElimStorePlain]: treesize reduction 67, result has 35.6 percent of original size [2019-10-14 21:42:14,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,523 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:42:14,525 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:21 [2019-10-14 21:42:14,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:14,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:14,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 32] total 82 [2019-10-14 21:42:14,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068226] [2019-10-14 21:42:14,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-10-14 21:42:14,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:14,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-10-14 21:42:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=6056, Unknown=0, NotChecked=0, Total=6642 [2019-10-14 21:42:14,949 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 82 states. [2019-10-14 21:42:18,652 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2019-10-14 21:42:20,864 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2019-10-14 21:42:21,340 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2019-10-14 21:42:21,869 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62