/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:14:36,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:14:36,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:14:36,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:14:36,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:14:36,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:14:36,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:14:36,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:14:36,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:14:36,255 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:14:36,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:14:36,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:14:36,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:14:36,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:14:36,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:14:36,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:14:36,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:14:36,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:14:36,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:14:36,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:14:36,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:14:36,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:14:36,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:14:36,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:14:36,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:14:36,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:14:36,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:14:36,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:14:36,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:14:36,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:14:36,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:14:36,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:14:36,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:14:36,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:14:36,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:14:36,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:14:36,302 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 [2020-07-17 12:14:36,329 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:14:36,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:14:36,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:14:36,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:14:36,332 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:14:36,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:14:36,333 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:14:36,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:14:36,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:14:36,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:14:36,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:14:36,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:14:36,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:14:36,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:14:36,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:14:36,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:14:36,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:14:36,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:14:36,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:14:36,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:14:36,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:14:36,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:14:36,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:14:36,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:14:36,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:14:36,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:14:36,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:14:36,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:14:36,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:14:36,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:14:36,625 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:14:36,639 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:14:36,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:14:36,644 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:14:36,644 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:14:36,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-17 12:14:36,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71ad0a45/1d11e03513854668a538d6fadc5f60c1/FLAG7d38d3b2f [2020-07-17 12:14:37,200 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:14:37,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-07-17 12:14:37,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71ad0a45/1d11e03513854668a538d6fadc5f60c1/FLAG7d38d3b2f [2020-07-17 12:14:37,562 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b71ad0a45/1d11e03513854668a538d6fadc5f60c1 [2020-07-17 12:14:37,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:14:37,575 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:14:37,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:37,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:14:37,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:14:37,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:37,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e526213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37, skipping insertion in model container [2020-07-17 12:14:37,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:37,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:14:37,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:14:37,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:37,899 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:14:37,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:14:37,943 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:14:37,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37 WrapperNode [2020-07-17 12:14:37,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:14:37,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:14:37,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:14:37,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:14:38,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (1/1) ... [2020-07-17 12:14:38,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:14:38,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:14:38,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:14:38,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:14:38,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (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 [2020-07-17 12:14:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:14:38,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:14:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 12:14:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:14:38,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:14:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:14:38,227 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 12:14:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 12:14:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:14:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 12:14:38,228 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 12:14:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:14:38,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 12:14:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 12:14:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 12:14:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:14:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:14:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:14:38,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:14:38,600 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 12:14:38,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:38 BoogieIcfgContainer [2020-07-17 12:14:38,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:14:38,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:14:38,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:14:38,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:14:38,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:14:37" (1/3) ... [2020-07-17 12:14:38,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a07fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:38, skipping insertion in model container [2020-07-17 12:14:38,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:14:37" (2/3) ... [2020-07-17 12:14:38,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a07fc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:14:38, skipping insertion in model container [2020-07-17 12:14:38,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:14:38" (3/3) ... [2020-07-17 12:14:38,617 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-07-17 12:14:38,630 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:14:38,639 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:14:38,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:14:38,681 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:14:38,681 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:14:38,682 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:14:38,682 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:14:38,682 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:14:38,682 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:14:38,682 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:14:38,683 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:14:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-17 12:14:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:38,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:38,712 INFO L422 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] [2020-07-17 12:14:38,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:38,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-17 12:14:38,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:38,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850247812] [2020-07-17 12:14:38,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:38,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850247812] [2020-07-17 12:14:38,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:38,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:14:38,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315320757] [2020-07-17 12:14:38,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:14:38,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:14:38,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:38,984 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-17 12:14:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:39,098 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-17 12:14:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:14:39,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-17 12:14:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:39,109 INFO L225 Difference]: With dead ends: 58 [2020-07-17 12:14:39,110 INFO L226 Difference]: Without dead ends: 29 [2020-07-17 12:14:39,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:14:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-17 12:14:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-17 12:14:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-17 12:14:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-17 12:14:39,156 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-17 12:14:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:39,156 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-17 12:14:39,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:14:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-17 12:14:39,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-17 12:14:39,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:39,158 INFO L422 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] [2020-07-17 12:14:39,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:14:39,159 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-17 12:14:39,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:39,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636078867] [2020-07-17 12:14:39,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:39,189 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:39,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007686655] [2020-07-17 12:14:39,190 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 [2020-07-17 12:14:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:39,258 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:14:39,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:39,367 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-07-17 12:14:39,368 INFO L384 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 1 case distinctions, treesize of input 27 treesize of output 15 [2020-07-17 12:14:39,369 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:39,376 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:39,379 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-17 12:14:39,380 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-07-17 12:14:39,429 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:39,430 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-17 12:14:39,432 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-17 12:14:39,445 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-17 12:14:39,446 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:39,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-17 12:14:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:39,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636078867] [2020-07-17 12:14:39,484 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:39,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007686655] [2020-07-17 12:14:39,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:39,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-17 12:14:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275194358] [2020-07-17 12:14:39,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 12:14:39,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:39,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 12:14:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:39,489 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-07-17 12:14:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:39,623 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-17 12:14:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:14:39,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-17 12:14:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:39,628 INFO L225 Difference]: With dead ends: 47 [2020-07-17 12:14:39,628 INFO L226 Difference]: Without dead ends: 45 [2020-07-17 12:14:39,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:14:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-17 12:14:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-07-17 12:14:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 12:14:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-17 12:14:39,646 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-07-17 12:14:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:39,647 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-17 12:14:39,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 12:14:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-17 12:14:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:14:39,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:39,649 INFO L422 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] [2020-07-17 12:14:39,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 12:14:39,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-07-17 12:14:39,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:39,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127295401] [2020-07-17 12:14:39,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:39,892 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:39,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678015362] [2020-07-17 12:14:39,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 12:14:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:39,961 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:14:39,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:39,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127295401] [2020-07-17 12:14:39,992 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:39,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678015362] [2020-07-17 12:14:39,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:14:39,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:14:39,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061557795] [2020-07-17 12:14:39,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:14:39,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:14:39,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:14:39,995 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-07-17 12:14:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:40,089 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-07-17 12:14:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 12:14:40,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-17 12:14:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:40,093 INFO L225 Difference]: With dead ends: 71 [2020-07-17 12:14:40,093 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 12:14:40,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 12:14:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-07-17 12:14:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-17 12:14:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-17 12:14:40,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-07-17 12:14:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:40,104 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-17 12:14:40,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:14:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-17 12:14:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 12:14:40,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:40,106 INFO L422 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] [2020-07-17 12:14:40,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:40,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-07-17 12:14:40,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:40,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356899308] [2020-07-17 12:14:40,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:40,357 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:40,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949236067] [2020-07-17 12:14:40,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 12:14:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:40,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:14:40,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:40,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356899308] [2020-07-17 12:14:40,454 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:40,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949236067] [2020-07-17 12:14:40,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:14:40,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 12:14:40,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876493688] [2020-07-17 12:14:40,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:14:40,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:14:40,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:14:40,456 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-07-17 12:14:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:14:40,554 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-07-17 12:14:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:14:40,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-17 12:14:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:14:40,556 INFO L225 Difference]: With dead ends: 66 [2020-07-17 12:14:40,557 INFO L226 Difference]: Without dead ends: 55 [2020-07-17 12:14:40,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:14:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-17 12:14:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-07-17 12:14:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 12:14:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-17 12:14:40,567 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-07-17 12:14:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:14:40,568 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-17 12:14:40,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:14:40,568 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-17 12:14:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 12:14:40,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:14:40,569 INFO L422 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] [2020-07-17 12:14:40,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:14:40,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:14:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:14:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-17 12:14:40,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:14:40,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320222050] [2020-07-17 12:14:40,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:14:40,798 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:14:40,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532851965] [2020-07-17 12:14:40,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-17 12:14:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:14:40,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-17 12:14:40,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:14:40,872 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-17 12:14:40,873 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:40,880 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:40,886 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-17 12:14:40,887 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:40,894 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:40,894 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:40,895 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-17 12:14:40,954 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-17 12:14:40,955 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-17 12:14:40,957 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:40,989 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-17 12:14:40,991 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:40,995 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-17 12:14:40,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-17 12:14:40,996 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:41,015 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:41,038 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:41,066 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:41,138 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-07-17 12:14:41,138 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:41,152 INFO L440 ElimStorePlain]: Different costs {12=[|v_#memory_int_14|], 20=[v_prenex_3]} [2020-07-17 12:14:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:14:41,167 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-17 12:14:41,168 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-07-17 12:14:41,169 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:41,228 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:14:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:14:41,263 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-17 12:14:41,264 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-07-17 12:14:41,267 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:41,357 INFO L624 ElimStorePlain]: treesize reduction 53, result has 65.6 percent of original size [2020-07-17 12:14:41,362 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-07-17 12:14:41,363 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:101 [2020-07-17 12:14:44,090 WARN L193 SmtUtils]: Spent 2.51 s on a formula simplification that was a NOOP. DAG size: 49 [2020-07-17 12:14:47,075 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 52 [2020-07-17 12:14:47,079 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:14:47,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:14:47,113 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:14:47,115 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:14:47,149 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-07-17 12:14:47,150 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 45 [2020-07-17 12:14:47,154 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:14:47,154 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:14:47,156 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:14:47,187 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-17 12:14:47,188 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 43 [2020-07-17 12:14:47,190 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-07-17 12:14:47,238 INFO L624 ElimStorePlain]: treesize reduction 24, result has 48.9 percent of original size [2020-07-17 12:14:47,239 INFO L544 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:14:47,240 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:129, output treesize:7 [2020-07-17 12:14:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:14:47,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320222050] [2020-07-17 12:14:47,309 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:14:47,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532851965] [2020-07-17 12:14:47,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:14:47,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 12:14:47,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103745286] [2020-07-17 12:14:47,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 12:14:47,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:14:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 12:14:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:14:47,312 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-07-17 12:14:56,610 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-07-17 12:15:04,019 WARN L193 SmtUtils]: Spent 7.32 s on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-07-17 12:15:15,623 WARN L193 SmtUtils]: Spent 9.50 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-07-17 12:15:22,752 WARN L193 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-07-17 12:15:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:27,503 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-07-17 12:15:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:15:27,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-17 12:15:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:27,510 INFO L225 Difference]: With dead ends: 64 [2020-07-17 12:15:27,510 INFO L226 Difference]: Without dead ends: 62 [2020-07-17 12:15:27,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2020-07-17 12:15:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-17 12:15:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-07-17 12:15:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 12:15:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-17 12:15:27,527 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-07-17 12:15:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:27,528 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-17 12:15:27,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 12:15:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-17 12:15:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:15:27,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:27,529 INFO L422 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] [2020-07-17 12:15:27,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:27,730 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1499578309, now seen corresponding path program 2 times [2020-07-17 12:15:27,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:27,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140185609] [2020-07-17 12:15:27,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:27,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140185609] [2020-07-17 12:15:27,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626984584] [2020-07-17 12:15:27,931 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 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 [2020-07-17 12:15:27,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 12:15:27,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:27,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:27,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:28,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:28,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:28,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882369042] [2020-07-17 12:15:28,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:28,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:28,047 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 11 states. [2020-07-17 12:15:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:28,486 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-07-17 12:15:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 12:15:28,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-17 12:15:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:28,489 INFO L225 Difference]: With dead ends: 84 [2020-07-17 12:15:28,489 INFO L226 Difference]: Without dead ends: 71 [2020-07-17 12:15:28,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:15:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-17 12:15:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2020-07-17 12:15:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 12:15:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-17 12:15:28,501 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-07-17 12:15:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:28,501 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-17 12:15:28,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-17 12:15:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 12:15:28,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:28,503 INFO L422 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] [2020-07-17 12:15:28,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-17 12:15:28,704 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 3 times [2020-07-17 12:15:28,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:28,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38838463] [2020-07-17 12:15:28,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:28,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38838463] [2020-07-17 12:15:28,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331776824] [2020-07-17 12:15:28,809 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 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 [2020-07-17 12:15:28,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-17 12:15:28,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:28,860 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 12:15:28,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:28,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:28,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-17 12:15:28,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139622330] [2020-07-17 12:15:28,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:28,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:28,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:28,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:28,919 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 11 states. [2020-07-17 12:15:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:29,422 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-07-17 12:15:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:15:29,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-17 12:15:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:29,424 INFO L225 Difference]: With dead ends: 79 [2020-07-17 12:15:29,425 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 12:15:29,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-17 12:15:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 12:15:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-07-17 12:15:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-17 12:15:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-17 12:15:29,442 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2020-07-17 12:15:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:29,445 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-17 12:15:29,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-17 12:15:29,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:15:29,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:29,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:29,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:29,648 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-07-17 12:15:29,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:29,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333959405] [2020-07-17 12:15:29,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:29,667 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:15:29,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183287454] [2020-07-17 12:15:29,668 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2020-07-17 12:15:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:29,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-17 12:15:29,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:29,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333959405] [2020-07-17 12:15:29,768 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:15:29,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183287454] [2020-07-17 12:15:29,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:29,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:15:29,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540380540] [2020-07-17 12:15:29,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:15:29,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:15:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:15:29,770 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-07-17 12:15:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:29,910 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-07-17 12:15:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:15:29,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-17 12:15:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:29,912 INFO L225 Difference]: With dead ends: 72 [2020-07-17 12:15:29,912 INFO L226 Difference]: Without dead ends: 50 [2020-07-17 12:15:29,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:15:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-17 12:15:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-07-17 12:15:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-17 12:15:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-17 12:15:29,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-07-17 12:15:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:29,922 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-17 12:15:29,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:15:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-17 12:15:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-17 12:15:29,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:29,923 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:30,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:30,134 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-07-17 12:15:30,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:30,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397421528] [2020-07-17 12:15:30,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:30,154 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:15:30,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203271278] [2020-07-17 12:15:30,155 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 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 [2020-07-17 12:15:30,207 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-17 12:15:30,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:30,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-17 12:15:30,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:30,226 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-17 12:15:30,227 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:30,236 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:30,242 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-17 12:15:30,243 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:30,251 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:30,252 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:30,252 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-07-17 12:15:30,348 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-17 12:15:30,348 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-17 12:15:30,350 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:30,412 INFO L624 ElimStorePlain]: treesize reduction 24, result has 67.1 percent of original size [2020-07-17 12:15:30,413 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,414 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:30,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-07-17 12:15:30,415 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,451 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,509 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,510 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:30,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:30,856 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-07-17 12:15:30,858 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-07-17 12:15:30,858 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 252 [2020-07-17 12:15:30,861 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-17 12:15:30,861 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-17 12:15:30,862 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-17 12:15:30,862 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-17 12:15:30,863 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-17 12:15:30,863 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-17 12:15:30,864 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-17 12:15:30,864 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:30,865 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:30,866 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,869 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:30,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:30,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:30,955 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:30,956 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 143 [2020-07-17 12:15:30,958 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-17 12:15:30,958 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-17 12:15:30,959 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-17 12:15:30,959 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:30,960 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:30,960 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:30,962 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:31,319 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 45 [2020-07-17 12:15:31,320 INFO L624 ElimStorePlain]: treesize reduction 800, result has 14.5 percent of original size [2020-07-17 12:15:31,322 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:31,323 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-07-17 12:15:31,324 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-07-17 12:15:31,324 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:31,448 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:31,519 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:31,639 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:31,844 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-17 12:15:31,847 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:31,891 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,892 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:31,904 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,916 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,962 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-07-17 12:15:31,963 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 107 [2020-07-17 12:15:31,964 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:31,988 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:31,993 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,000 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:32,042 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:32,084 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2020-07-17 12:15:32,089 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,124 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-07-17 12:15:32,125 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:32,436 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-07-17 12:15:32,437 INFO L624 ElimStorePlain]: treesize reduction 53, result has 79.5 percent of original size [2020-07-17 12:15:32,438 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2020-07-17 12:15:32,438 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:206 [2020-07-17 12:15:32,706 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-17 12:15:32,709 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-07-17 12:15:32,710 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:32,923 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-17 12:15:32,925 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,118 INFO L244 Elim1Store]: Index analysis took 147 ms [2020-07-17 12:15:33,221 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-07-17 12:15:33,222 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 173 [2020-07-17 12:15:33,224 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,480 INFO L244 Elim1Store]: Index analysis took 230 ms [2020-07-17 12:15:33,501 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:33,502 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 100 [2020-07-17 12:15:33,503 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:33,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:33,558 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-17 12:15:33,559 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 107 [2020-07-17 12:15:33,561 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-17 12:15:33,886 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2020-07-17 12:15:33,887 INFO L624 ElimStorePlain]: treesize reduction 210, result has 53.6 percent of original size [2020-07-17 12:15:33,894 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2020-07-17 12:15:33,895 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:263, output treesize:243 [2020-07-17 12:15:38,214 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 99 [2020-07-17 12:15:40,602 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 102 [2020-07-17 12:15:40,605 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,659 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:40,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:40,735 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-07-17 12:15:40,735 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 65 [2020-07-17 12:15:40,737 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:40,738 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,759 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:40,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,786 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,799 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:40,932 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-07-17 12:15:40,933 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-07-17 12:15:40,933 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 111 [2020-07-17 12:15:40,936 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-17 12:15:40,936 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:40,937 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:40,937 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,938 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:40,939 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,940 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,944 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-17 12:15:40,945 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:40,946 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:40,946 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,948 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-17 12:15:40,948 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,949 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,949 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:40,958 INFO L544 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:40,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:40,978 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-17 12:15:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-17 12:15:41,068 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-07-17 12:15:41,068 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 82 treesize of output 80 [2020-07-17 12:15:41,070 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:41,070 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:41,071 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:41,071 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:41,075 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:41,076 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:41,079 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:41,079 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:41,080 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-17 12:15:41,080 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:41,081 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:41,081 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-17 12:15:41,087 INFO L544 ElimStorePlain]: Start of recursive call 4: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-17 12:15:41,354 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2020-07-17 12:15:41,356 INFO L624 ElimStorePlain]: treesize reduction 96, result has 60.2 percent of original size [2020-07-17 12:15:41,365 INFO L544 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-17 12:15:41,365 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:285, output treesize:7 [2020-07-17 12:15:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:41,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397421528] [2020-07-17 12:15:41,503 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:15:41,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203271278] [2020-07-17 12:15:41,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:15:41,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 12:15:41,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257346651] [2020-07-17 12:15:41,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 12:15:41,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:41,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 12:15:41,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2020-07-17 12:15:41,506 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2020-07-17 12:15:41,986 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2020-07-17 12:15:42,372 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2020-07-17 12:15:42,642 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-07-17 12:15:46,396 WARN L193 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-07-17 12:15:51,631 WARN L193 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 130 DAG size of output: 130 [2020-07-17 12:15:56,956 WARN L193 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 132 DAG size of output: 132 [2020-07-17 12:16:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:01,299 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-07-17 12:16:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 12:16:01,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-07-17 12:16:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:01,305 INFO L225 Difference]: With dead ends: 77 [2020-07-17 12:16:01,305 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 12:16:01,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=67, Invalid=312, Unknown=1, NotChecked=0, Total=380 [2020-07-17 12:16:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 12:16:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-07-17 12:16:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 12:16:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-07-17 12:16:01,319 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2020-07-17 12:16:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:01,319 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-07-17 12:16:01,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 12:16:01,319 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-07-17 12:16:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-17 12:16:01,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:01,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:01,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-17 12:16:01,534 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-07-17 12:16:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:01,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656041242] [2020-07-17 12:16:01,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:01,554 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:16:01,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547213949] [2020-07-17 12:16:01,555 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 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 [2020-07-17 12:16:01,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-07-17 12:16:01,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:16:01,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 12:16:01,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:16:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:16:01,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656041242] [2020-07-17 12:16:01,694 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-17 12:16:01,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547213949] [2020-07-17 12:16:01,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 12:16:01,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 12:16:01,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729659527] [2020-07-17 12:16:01,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 12:16:01,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:16:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 12:16:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-17 12:16:01,696 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-07-17 12:16:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:16:02,201 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-07-17 12:16:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 12:16:02,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-07-17 12:16:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:16:02,206 INFO L225 Difference]: With dead ends: 100 [2020-07-17 12:16:02,206 INFO L226 Difference]: Without dead ends: 89 [2020-07-17 12:16:02,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-17 12:16:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-07-17 12:16:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-07-17 12:16:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 12:16:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-07-17 12:16:02,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2020-07-17 12:16:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:16:02,227 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-07-17 12:16:02,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 12:16:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-07-17 12:16:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 12:16:02,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:16:02,232 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:16:02,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,440 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:16:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:16:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-07-17 12:16:02,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:16:02,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24642761] [2020-07-17 12:16:02,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:16:02,473 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-17 12:16:02,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211880378] [2020-07-17 12:16:02,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:16:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:16:02,571 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:16:02,571 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:16:02,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:16:02,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:16:02 BoogieIcfgContainer [2020-07-17 12:16:02,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:16:02,853 INFO L168 Benchmark]: Toolchain (without parser) took 85280.10 ms. Allocated memory was 145.8 MB in the beginning and 279.4 MB in the end (delta: 133.7 MB). Free memory was 103.7 MB in the beginning and 131.6 MB in the end (delta: -27.9 MB). Peak memory consumption was 105.8 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,856 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.40 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,857 INFO L168 Benchmark]: Boogie Preprocessor took 192.46 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 93.0 MB in the beginning and 181.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,857 INFO L168 Benchmark]: RCFGBuilder took 467.40 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 164.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,858 INFO L168 Benchmark]: TraceAbstraction took 84244.90 ms. Allocated memory was 204.5 MB in the beginning and 279.4 MB in the end (delta: 75.0 MB). Free memory was 164.8 MB in the beginning and 131.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. [2020-07-17 12:16:02,864 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.40 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 93.0 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 192.46 ms. Allocated memory was 145.8 MB in the beginning and 204.5 MB in the end (delta: 58.7 MB). Free memory was 93.0 MB in the beginning and 181.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 467.40 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 164.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 84244.90 ms. Allocated memory was 204.5 MB in the beginning and 279.4 MB in the end (delta: 75.0 MB). Free memory was 164.8 MB in the beginning and 131.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 1 [L30] b[0] = 1 [L31] i=1 VAL [\old(N)=0, a={-2:0}, b={-1:0}, i=1, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L31] COND TRUE i