/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 0.1.25-3af5e1f [2020-09-04 13:42:20,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:20,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:20,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:20,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:20,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:20,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:20,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:20,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:20,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:20,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:20,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:20,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:20,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:20,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:20,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:20,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:20,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:20,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:20,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:20,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:20,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:20,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:20,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:20,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:20,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:20,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:20,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:20,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:20,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:20,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:20,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:20,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:20,418 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:20,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:20,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:20,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:20,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:20,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:20,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:20,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:20,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:20,421 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:20,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:20,421 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:20,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:20,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:20,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:20,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:20,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:20,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:20,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:20,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:20,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:20,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:20,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:20,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:20,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:20,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:20,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:20,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:20,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:20,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:20,951 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:20,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-09-04 13:42:21,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff9f13086/9d4198cab0654878a83a6bcd99df28d0/FLAGb1d36e513 [2020-09-04 13:42:21,596 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:21,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-09-04 13:42:21,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff9f13086/9d4198cab0654878a83a6bcd99df28d0/FLAGb1d36e513 [2020-09-04 13:42:21,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff9f13086/9d4198cab0654878a83a6bcd99df28d0 [2020-09-04 13:42:21,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:21,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:21,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:21,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:21,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:21,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:21" (1/1) ... [2020-09-04 13:42:21,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3330734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:21, skipping insertion in model container [2020-09-04 13:42:21,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:21" (1/1) ... [2020-09-04 13:42:21,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:21,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:22,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:22,263 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:22,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:22,311 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:22,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22 WrapperNode [2020-09-04 13:42:22,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:22,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:22,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:22,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:22,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... [2020-09-04 13:42:22,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:22,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:22,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:22,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:22,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:22,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:22,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:22,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:22,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:22,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:22,953 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:22,954 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:22,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:22 BoogieIcfgContainer [2020-09-04 13:42:22,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:22,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:22,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:22,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:22,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:21" (1/3) ... [2020-09-04 13:42:22,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f80f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:22, skipping insertion in model container [2020-09-04 13:42:22,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:22" (2/3) ... [2020-09-04 13:42:22,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25f80f20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:22, skipping insertion in model container [2020-09-04 13:42:22,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:22" (3/3) ... [2020-09-04 13:42:22,969 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-09-04 13:42:22,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:22,994 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:23,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:23,053 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:23,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:23,053 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:23,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:23,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:23,054 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:23,054 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:23,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-09-04 13:42:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:23,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:23,084 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] [2020-09-04 13:42:23,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-09-04 13:42:23,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:23,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2237477] [2020-09-04 13:42:23,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:23,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:23,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:23,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2237477] [2020-09-04 13:42:23,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:23,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:23,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303502913] [2020-09-04 13:42:23,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:23,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:23,377 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-09-04 13:42:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:23,515 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-09-04 13:42:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:23,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 13:42:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:23,539 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:42:23,540 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 13:42:23,545 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 [2020-09-04 13:42:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 13:42:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-04 13:42:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 13:42:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-09-04 13:42:23,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-09-04 13:42:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:23,593 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-09-04 13:42:23,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-09-04 13:42:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:23,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:23,594 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] [2020-09-04 13:42:23,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:23,595 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:23,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-09-04 13:42:23,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:23,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771000900] [2020-09-04 13:42:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:23,628 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:23,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516146527] [2020-09-04 13:42:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:23,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:23,798 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-09-04 13:42:23,799 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 [2020-09-04 13:42:23,800 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:23,808 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:23,815 INFO L545 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. [2020-09-04 13:42:23,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-09-04 13:42:23,878 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:23,878 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 [2020-09-04 13:42:23,881 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-09-04 13:42:23,894 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-09-04 13:42:23,894 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:23,895 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-09-04 13:42:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:23,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771000900] [2020-09-04 13:42:23,943 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:23,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516146527] [2020-09-04 13:42:23,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:23,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:42:23,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912248976] [2020-09-04 13:42:23,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:23,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:23,948 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-09-04 13:42:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:24,081 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-09-04 13:42:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:24,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-04 13:42:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:24,086 INFO L225 Difference]: With dead ends: 47 [2020-09-04 13:42:24,086 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 13:42:24,087 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 [2020-09-04 13:42:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 13:42:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-09-04 13:42:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:42:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-09-04 13:42:24,104 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-09-04 13:42:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:24,104 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-09-04 13:42:24,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-09-04 13:42:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:42:24,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,106 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] [2020-09-04 13:42:24,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:24,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-09-04 13:42:24,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72536603] [2020-09-04 13:42:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:24,349 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:24,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582551784] [2020-09-04 13:42:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:24,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72536603] [2020-09-04 13:42:24,459 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:24,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582551784] [2020-09-04 13:42:24,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:24,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:42:24,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670151901] [2020-09-04 13:42:24,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:42:24,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:42:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:42:24,461 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-09-04 13:42:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:24,563 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-09-04 13:42:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:42:24,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 13:42:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:24,568 INFO L225 Difference]: With dead ends: 71 [2020-09-04 13:42:24,568 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 13:42:24,569 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 [2020-09-04 13:42:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 13:42:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-09-04 13:42:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:42:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-09-04 13:42:24,579 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-09-04 13:42:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:24,580 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-09-04 13:42:24,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:42:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-09-04 13:42:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:42:24,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:24,581 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] [2020-09-04 13:42:24,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:24,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:24,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-09-04 13:42:24,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:24,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667357555] [2020-09-04 13:42:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:24,825 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:24,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829288953] [2020-09-04 13:42:24,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:24,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667357555] [2020-09-04 13:42:24,917 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:24,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829288953] [2020-09-04 13:42:24,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:24,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 13:42:24,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951124039] [2020-09-04 13:42:24,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:42:24,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:42:24,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:42:24,921 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-09-04 13:42:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:25,045 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-09-04 13:42:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:25,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-04 13:42:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:25,050 INFO L225 Difference]: With dead ends: 66 [2020-09-04 13:42:25,050 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 13:42:25,051 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 [2020-09-04 13:42:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 13:42:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-09-04 13:42:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 13:42:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-09-04 13:42:25,067 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-09-04 13:42:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:25,070 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-09-04 13:42:25,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:42:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-09-04 13:42:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:42:25,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:25,072 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] [2020-09-04 13:42:25,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:25,273 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-09-04 13:42:25,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:25,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032201362] [2020-09-04 13:42:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:25,310 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:25,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606309254] [2020-09-04 13:42:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-04 13:42:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:25,419 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 [2020-09-04 13:42:25,421 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,443 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 [2020-09-04 13:42:25,444 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,454 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,454 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,455 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-09-04 13:42:25,538 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-09-04 13:42:25,539 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 [2020-09-04 13:42:25,541 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,580 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-09-04 13:42:25,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,590 INFO L545 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. [2020-09-04 13:42:25,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-09-04 13:42:25,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,811 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-09-04 13:42:25,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:25,839 INFO L441 ElimStorePlain]: Different costs {12=[v_prenex_2], 20=[|v_#memory_int_14|]} [2020-09-04 13:42:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:25,853 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-09-04 13:42:25,854 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 [2020-09-04 13:42:25,856 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:25,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:25,935 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-09-04 13:42:25,935 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 [2020-09-04 13:42:25,937 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:26,015 INFO L625 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2020-09-04 13:42:26,026 INFO L545 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. [2020-09-04 13:42:26,026 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2020-09-04 13:42:26,971 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-09-04 13:42:28,426 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 51 [2020-09-04 13:42:28,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:28,470 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:28,495 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-09-04 13:42:28,496 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 [2020-09-04 13:42:28,498 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:42:28,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:28,500 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:28,537 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-09-04 13:42:28,537 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 60 treesize of output 44 [2020-09-04 13:42:28,540 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-09-04 13:42:28,574 INFO L625 ElimStorePlain]: treesize reduction 27, result has 46.0 percent of original size [2020-09-04 13:42:28,576 INFO L545 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:28,577 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:138, output treesize:7 [2020-09-04 13:42:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:28,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032201362] [2020-09-04 13:42:28,651 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:28,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606309254] [2020-09-04 13:42:28,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:28,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 13:42:28,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382129923] [2020-09-04 13:42:28,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:28,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:28,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:28,654 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-09-04 13:42:36,956 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-09-04 13:42:43,332 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-04 13:42:47,868 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-09-04 13:42:52,276 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-09-04 13:42:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:53,526 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-04 13:42:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 13:42:53,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:42:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:53,536 INFO L225 Difference]: With dead ends: 69 [2020-09-04 13:42:53,536 INFO L226 Difference]: Without dead ends: 67 [2020-09-04 13:42:53,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-04 13:42:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2020-09-04 13:42:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:42:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-09-04 13:42:53,555 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-09-04 13:42:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:53,555 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-09-04 13:42:53,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-09-04 13:42:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:53,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:53,557 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] [2020-09-04 13:42:53,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:53,773 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1499578309, now seen corresponding path program 2 times [2020-09-04 13:42:53,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:53,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366917106] [2020-09-04 13:42:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:53,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:53,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366917106] [2020-09-04 13:42:53,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92254451] [2020-09-04 13:42:53,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:54,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:54,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:54,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:54,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:54,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-09-04 13:42:54,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356438587] [2020-09-04 13:42:54,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:54,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:54,068 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-09-04 13:42:54,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:54,550 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-09-04 13:42:54,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:42:54,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-04 13:42:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:54,553 INFO L225 Difference]: With dead ends: 84 [2020-09-04 13:42:54,555 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 13:42:54,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:42:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 13:42:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2020-09-04 13:42:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:42:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-04 13:42:54,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-09-04 13:42:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:54,568 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-04 13:42:54,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-04 13:42:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 13:42:54,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:54,570 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] [2020-09-04 13:42:54,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:42:54,780 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 3 times [2020-09-04 13:42:54,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:54,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78098032] [2020-09-04 13:42:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:54,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:54,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:54,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78098032] [2020-09-04 13:42:54,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813151224] [2020-09-04 13:42:54,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:54,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-04 13:42:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:42:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:55,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:55,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-09-04 13:42:55,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685951748] [2020-09-04 13:42:55,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:55,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:55,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:55,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:55,007 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 10 states. [2020-09-04 13:42:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:55,544 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-09-04 13:42:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:42:55,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-09-04 13:42:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:55,548 INFO L225 Difference]: With dead ends: 79 [2020-09-04 13:42:55,548 INFO L226 Difference]: Without dead ends: 68 [2020-09-04 13:42:55,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:42:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-04 13:42:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-09-04 13:42:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 13:42:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 13:42:55,557 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2020-09-04 13:42:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:55,558 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 13:42:55,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 13:42:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 13:42:55,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:55,559 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] [2020-09-04 13:42:55,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:55,762 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-09-04 13:42:55,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:55,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223192600] [2020-09-04 13:42:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:55,774 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:55,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312244249] [2020-09-04 13:42:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:55,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-04 13:42:55,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:55,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223192600] [2020-09-04 13:42:55,861 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:55,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312244249] [2020-09-04 13:42:55,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:55,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:42:55,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042031687] [2020-09-04 13:42:55,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:42:55,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:55,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:42:55,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:55,863 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-09-04 13:42:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:56,043 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-09-04 13:42:56,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:42:56,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-04 13:42:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:56,047 INFO L225 Difference]: With dead ends: 72 [2020-09-04 13:42:56,047 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 13:42:56,048 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 [2020-09-04 13:42:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 13:42:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-09-04 13:42:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:42:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-09-04 13:42:56,056 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-09-04 13:42:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:56,056 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-09-04 13:42:56,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:42:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-09-04 13:42:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 13:42:56,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:56,058 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] [2020-09-04 13:42:56,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:56,273 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-09-04 13:42:56,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:56,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552952024] [2020-09-04 13:42:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:56,298 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:56,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575340089] [2020-09-04 13:42:56,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:56,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-04 13:42:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-04 13:42:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:56,362 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 [2020-09-04 13:42:56,364 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:56,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:56,379 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 [2020-09-04 13:42:56,379 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:56,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:56,387 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:56,388 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-09-04 13:42:56,494 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-09-04 13:42:56,495 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 [2020-09-04 13:42:56,496 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:56,563 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-09-04 13:42:56,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:56,566 INFO L545 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. [2020-09-04 13:42:56,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-09-04 13:42:56,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:56,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:56,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:56,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:56,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:56,872 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:56,873 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 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 [2020-09-04 13:42:56,875 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-09-04 13:42:56,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:42:56,876 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-09-04 13:42:56,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:42:56,877 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:42:56,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:56,885 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:57,247 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-09-04 13:42:57,248 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-09-04 13:42:57,249 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 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 [2020-09-04 13:42:57,255 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-09-04 13:42:57,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-09-04 13:42:57,257 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-09-04 13:42:57,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-09-04 13:42:57,259 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-09-04 13:42:57,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:42:57,260 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-09-04 13:42:57,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:42:57,261 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:42:57,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:57,270 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:57,647 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-09-04 13:42:57,648 INFO L625 ElimStorePlain]: treesize reduction 805, result has 14.5 percent of original size [2020-09-04 13:42:57,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:57,656 INFO L545 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. [2020-09-04 13:42:57,656 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-09-04 13:42:57,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:57,818 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-09-04 13:42:57,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:57,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:58,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:58,517 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-09-04 13:42:58,519 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:42:58,559 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,571 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,579 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,614 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,660 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 [2020-09-04 13:42:58,661 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:58,692 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,704 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,752 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,807 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-09-04 13:42:58,808 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 [2020-09-04 13:42:58,810 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,839 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:42:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:42:58,848 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 [2020-09-04 13:42:58,850 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:59,262 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-09-04 13:42:59,263 INFO L625 ElimStorePlain]: treesize reduction 71, result has 78.1 percent of original size [2020-09-04 13:42:59,265 INFO L545 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. [2020-09-04 13:42:59,265 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:253 [2020-09-04 13:42:59,765 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-09-04 13:42:59,768 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-09-04 13:42:59,768 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:00,121 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-09-04 13:43:00,124 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,772 INFO L244 Elim1Store]: Index analysis took 596 ms [2020-09-04 13:43:00,800 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:00,800 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 79 treesize of output 107 [2020-09-04 13:43:00,802 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,180 INFO L244 Elim1Store]: Index analysis took 333 ms [2020-09-04 13:43:01,196 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:43:01,197 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 [2020-09-04 13:43:01,199 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:01,349 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-04 13:43:01,349 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-09-04 13:43:01,349 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 99 treesize of output 177 [2020-09-04 13:43:01,351 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:01,794 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-09-04 13:43:01,795 INFO L625 ElimStorePlain]: treesize reduction 231, result has 55.5 percent of original size [2020-09-04 13:43:01,806 INFO L545 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. [2020-09-04 13:43:01,807 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:285, output treesize:288 [2020-09-04 13:43:03,942 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 103 [2020-09-04 13:43:08,338 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 107 [2020-09-04 13:43:08,344 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:08,421 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:43:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:43:08,573 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-09-04 13:43:08,574 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-09-04 13:43:08,574 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 82 treesize of output 65 [2020-09-04 13:43:08,576 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:43:08,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,581 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:08,598 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:43:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,622 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:43:08,879 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-09-04 13:43:08,880 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-09-04 13:43:08,881 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 96 treesize of output 113 [2020-09-04 13:43:08,883 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-09-04 13:43:08,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:08,888 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-09-04 13:43:08,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:08,889 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:43:08,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:08,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:08,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-09-04 13:43:08,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:08,911 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:43:08,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:43:08,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,915 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-09-04 13:43:08,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:08,918 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-09-04 13:43:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2020-09-04 13:43:08,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:08,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-09-04 13:43:09,153 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-09-04 13:43:09,154 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-09-04 13:43:09,154 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 94 treesize of output 82 [2020-09-04 13:43:09,158 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-09-04 13:43:09,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,176 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:09,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,182 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:09,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,189 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-09-04 13:43:09,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:43:09,192 INFO L545 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-09-04 13:43:09,353 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 31 [2020-09-04 13:43:09,354 INFO L625 ElimStorePlain]: treesize reduction 395, result has 10.6 percent of original size [2020-09-04 13:43:09,359 INFO L545 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-09-04 13:43:09,360 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:303, output treesize:19 [2020-09-04 13:43:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552952024] [2020-09-04 13:43:09,638 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:09,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575340089] [2020-09-04 13:43:09,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:09,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 13:43:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048669973] [2020-09-04 13:43:09,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:43:09,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:43:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2020-09-04 13:43:09,640 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2020-09-04 13:43:10,362 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-09-04 13:43:10,841 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-09-04 13:43:11,407 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-09-04 13:43:15,500 WARN L193 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-09-04 13:43:24,757 WARN L193 SmtUtils]: Spent 8.50 s on a formula simplification. DAG size of input: 146 DAG size of output: 127 [2020-09-04 13:43:32,208 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 148 DAG size of output: 129 [2020-09-04 13:43:38,152 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-09-04 13:43:50,432 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2020-09-04 13:43:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:52,712 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-09-04 13:43:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 13:43:52,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-09-04 13:43:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:52,720 INFO L225 Difference]: With dead ends: 79 [2020-09-04 13:43:52,720 INFO L226 Difference]: Without dead ends: 77 [2020-09-04 13:43:52,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=75, Invalid=382, Unknown=5, NotChecked=0, Total=462 [2020-09-04 13:43:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-04 13:43:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-04 13:43:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 13:43:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-09-04 13:43:52,732 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2020-09-04 13:43:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:52,732 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-09-04 13:43:52,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:43:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-09-04 13:43:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 13:43:52,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:52,734 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] [2020-09-04 13:43:52,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-04 13:43:52,943 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-09-04 13:43:52,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:52,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524614500] [2020-09-04 13:43:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:52,969 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:52,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673735695] [2020-09-04 13:43:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:53,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-04 13:43:53,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:43:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:43:53,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:43:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:43:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524614500] [2020-09-04 13:43:53,113 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:43:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673735695] [2020-09-04 13:43:53,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:43:53,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:43:53,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440081067] [2020-09-04 13:43:53,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:43:53,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:43:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:43:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:43:53,115 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-09-04 13:43:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:43:53,668 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-04 13:43:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:43:53,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-09-04 13:43:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:43:53,672 INFO L225 Difference]: With dead ends: 100 [2020-09-04 13:43:53,672 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 13:43:53,673 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 [2020-09-04 13:43:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 13:43:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-09-04 13:43:53,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 13:43:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-04 13:43:53,686 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2020-09-04 13:43:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:43:53,686 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-04 13:43:53,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:43:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-04 13:43:53,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:43:53,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:43:53,688 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] [2020-09-04 13:43:53,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:53,896 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:43:53,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:43:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-09-04 13:43:53,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:43:53,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979862079] [2020-09-04 13:43:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:43:53,907 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:43:53,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862583825] [2020-09-04 13:43:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:43:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:53,958 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:43:53,976 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:43:54,021 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:43:54,021 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:43:54,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:43:54,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:43:54 BoogieIcfgContainer [2020-09-04 13:43:54,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:43:54,303 INFO L168 Benchmark]: Toolchain (without parser) took 92354.09 ms. Allocated memory was 137.9 MB in the beginning and 293.6 MB in the end (delta: 155.7 MB). Free memory was 101.3 MB in the beginning and 260.7 MB in the end (delta: -159.3 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,303 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,304 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.04 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 90.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,307 INFO L168 Benchmark]: Boogie Preprocessor took 201.67 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 90.7 MB in the beginning and 180.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,307 INFO L168 Benchmark]: RCFGBuilder took 444.67 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 163.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,308 INFO L168 Benchmark]: TraceAbstraction took 91340.76 ms. Allocated memory was 202.9 MB in the beginning and 293.6 MB in the end (delta: 90.7 MB). Free memory was 163.0 MB in the beginning and 260.7 MB in the end (delta: -97.7 MB). Peak memory consumption was 157.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:43:54,313 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 362.04 ms. Allocated memory is still 137.9 MB. Free memory was 101.1 MB in the beginning and 90.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 201.67 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 90.7 MB in the beginning and 180.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 444.67 ms. Allocated memory is still 202.9 MB. Free memory was 180.8 MB in the beginning and 163.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 91340.76 ms. Allocated memory was 202.9 MB in the beginning and 293.6 MB in the end (delta: 90.7 MB). Free memory was 163.0 MB in the beginning and 260.7 MB in the end (delta: -97.7 MB). Peak memory consumption was 157.7 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)=4, 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={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L31] COND TRUE i