/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/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:31:38,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:31:38,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:31:38,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:31:38,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:31:38,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:31:38,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:31:38,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:31:38,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:31:38,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:31:38,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:31:38,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:31:38,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:31:38,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:31:38,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:31:38,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:31:38,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:31:38,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:31:38,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:31:38,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:31:38,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:31:38,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:31:38,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:31:38,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:31:38,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:31:38,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:31:38,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:31:38,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:31:38,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:31:38,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:31:38,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:31:38,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:31:38,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:31:38,647 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:31:38,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:31:38,648 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:31:38,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:31:38,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:31:38,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:31:38,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:31:38,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:31:38,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:31:38,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:31:38,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:31:38,651 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:31:38,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:31:38,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:31:38,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:31:38,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:31:38,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:31:38,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:38,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:31:38,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:31:38,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:31:38,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:31:38,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:31:38,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:31:38,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:31:38,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:31:38,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:31:38,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:31:38,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:31:38,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:31:38,973 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:31:38,973 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-07 11:31:39,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf708cf2/f3ffec1a5ba84231a52b4611f3276fbb/FLAGf6c9101de [2020-07-07 11:31:39,558 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:31:39,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-07 11:31:39,567 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf708cf2/f3ffec1a5ba84231a52b4611f3276fbb/FLAGf6c9101de [2020-07-07 11:31:39,857 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcf708cf2/f3ffec1a5ba84231a52b4611f3276fbb [2020-07-07 11:31:39,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:31:39,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:31:39,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:39,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:31:39,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:31:39,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:39" (1/1) ... [2020-07-07 11:31:39,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72072d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:39, skipping insertion in model container [2020-07-07 11:31:39,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:31:39" (1/1) ... [2020-07-07 11:31:39,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:31:39,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:31:40,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:40,166 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:31:40,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:31:40,318 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:31:40,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40 WrapperNode [2020-07-07 11:31:40,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:31:40,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:31:40,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:31:40,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:31:40,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... [2020-07-07 11:31:40,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:31:40,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:31:40,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:31:40,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:31:40,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:31:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:31:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:31:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-07 11:31:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-07 11:31:40,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:31:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:31:40,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:31:40,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:31:40,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:31:40,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:31:40,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:31:40,794 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-07 11:31:40,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:40 BoogieIcfgContainer [2020-07-07 11:31:40,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:31:40,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:31:40,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:31:40,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:31:40,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:31:39" (1/3) ... [2020-07-07 11:31:40,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed64769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:40, skipping insertion in model container [2020-07-07 11:31:40,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:31:40" (2/3) ... [2020-07-07 11:31:40,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed64769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:31:40, skipping insertion in model container [2020-07-07 11:31:40,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:31:40" (3/3) ... [2020-07-07 11:31:40,810 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-07 11:31:40,824 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:31:40,833 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:31:40,850 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:31:40,878 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:31:40,878 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:31:40,879 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:31:40,879 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:31:40,879 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:31:40,879 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:31:40,880 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:31:40,880 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:31:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-07 11:31:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:31:40,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:40,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:40,911 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:40,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-07-07 11:31:40,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:40,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246708045] [2020-07-07 11:31:40,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246708045] [2020-07-07 11:31:41,196 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-07 11:31:41,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668261444] [2020-07-07 11:31:41,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-07 11:31:41,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:31:41,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:41,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:31:41,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118371456] [2020-07-07 11:31:41,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:31:41,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:41,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:31:41,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:31:41,384 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-07-07 11:31:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:41,429 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-07-07 11:31:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:31:41,432 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-07-07 11:31:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:41,449 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:31:41,449 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:31:41,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 11:31:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:31:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:31:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:31:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-07-07 11:31:41,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-07-07 11:31:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:41,510 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-07-07 11:31:41,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:31:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-07-07 11:31:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:31:41,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:41,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:41,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 11:31:41,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-07-07 11:31:41,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:41,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33177954] [2020-07-07 11:31:41,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:41,762 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:41,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357736344] [2020-07-07 11:31:41,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:41,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:31:41,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 11:31:41,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33177954] [2020-07-07 11:31:41,859 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:41,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357736344] [2020-07-07 11:31:41,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:41,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:31:41,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685820312] [2020-07-07 11:31:41,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:31:41,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:31:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:41,863 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-07-07 11:31:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:41,902 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-07-07 11:31:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:31:41,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-07 11:31:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:41,906 INFO L225 Difference]: With dead ends: 57 [2020-07-07 11:31:41,906 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:31:41,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:31:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:31:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-07-07 11:31:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-07 11:31:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-07 11:31:41,920 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-07-07 11:31:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:41,921 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-07 11:31:41,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:31:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-07 11:31:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-07 11:31:41,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:41,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:42,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:42,139 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:42,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:42,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-07-07 11:31:42,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:42,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858547673] [2020-07-07 11:31:42,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:31:42,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858547673] [2020-07-07 11:31:42,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:42,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:31:42,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29874012] [2020-07-07 11:31:42,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:31:42,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:42,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:31:42,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:31:42,313 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2020-07-07 11:31:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:42,645 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-07 11:31:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:31:42,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-07-07 11:31:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:42,647 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:31:42,647 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:31:42,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:31:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-07-07 11:31:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-07 11:31:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-07 11:31:42,657 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-07-07 11:31:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:42,658 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-07 11:31:42,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:31:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-07 11:31:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:31:42,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:42,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:42,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:31:42,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-07-07 11:31:42,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:42,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188086669] [2020-07-07 11:31:42,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:31:42,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188086669] [2020-07-07 11:31:42,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121225547] [2020-07-07 11:31:42,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:42,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:42,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:31:42,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:42,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-07 11:31:42,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146291718] [2020-07-07 11:31:42,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:31:42,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:42,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:31:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:42,978 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-07-07 11:31:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:43,312 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-07 11:31:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:31:43,313 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-07-07 11:31:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:43,315 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:31:43,315 INFO L226 Difference]: Without dead ends: 41 [2020-07-07 11:31:43,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:31:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-07 11:31:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-07-07 11:31:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-07 11:31:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-07 11:31:43,325 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-07-07 11:31:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:43,326 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-07 11:31:43,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:31:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-07 11:31:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 11:31:43,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:43,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2020-07-07 11:31:43,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:43,533 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:43,534 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-07-07 11:31:43,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:43,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13786772] [2020-07-07 11:31:43,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:31:43,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13786772] [2020-07-07 11:31:43,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687676241] [2020-07-07 11:31:43,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:43,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 11:31:43,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:43,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 11:31:43,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:31:43,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:43,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2020-07-07 11:31:43,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999136993] [2020-07-07 11:31:43,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 11:31:43,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 11:31:43,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:43,762 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-07-07 11:31:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:43,829 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-07-07 11:31:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 11:31:43,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-07-07 11:31:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:43,831 INFO L225 Difference]: With dead ends: 65 [2020-07-07 11:31:43,832 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 11:31:43,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 11:31:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-07-07 11:31:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:31:43,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-07 11:31:43,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-07-07 11:31:43,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:43,841 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-07 11:31:43,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 11:31:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-07 11:31:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 11:31:43,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:43,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-07-07 11:31:44,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:44,056 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-07-07 11:31:44,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630890340] [2020-07-07 11:31:44,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 11:31:44,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630890340] [2020-07-07 11:31:44,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724587204] [2020-07-07 11:31:44,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 11:31:44,273 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-07 11:31:44,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:31:44,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-07-07 11:31:44,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711986439] [2020-07-07 11:31:44,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:31:44,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:31:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:44,322 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2020-07-07 11:31:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:44,603 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-07-07 11:31:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:31:44,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-07 11:31:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:44,604 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:31:44,605 INFO L226 Difference]: Without dead ends: 46 [2020-07-07 11:31:44,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:31:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-07 11:31:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-07 11:31:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:31:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-07 11:31:44,613 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-07-07 11:31:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:44,613 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-07 11:31:44,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:31:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-07 11:31:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 11:31:44,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:44,615 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1] [2020-07-07 11:31:44,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:31:44,830 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:44,831 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-07-07 11:31:44,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:44,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649414004] [2020-07-07 11:31:44,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-07 11:31:44,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649414004] [2020-07-07 11:31:44,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:44,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:31:45,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861729265] [2020-07-07 11:31:45,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:31:45,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:31:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:31:45,005 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 6 states. [2020-07-07 11:31:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:45,207 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-07-07 11:31:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:31:45,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-07-07 11:31:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:45,209 INFO L225 Difference]: With dead ends: 69 [2020-07-07 11:31:45,209 INFO L226 Difference]: Without dead ends: 47 [2020-07-07 11:31:45,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-07 11:31:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-07-07 11:31:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-07 11:31:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-07 11:31:45,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-07-07 11:31:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:45,218 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-07 11:31:45,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:31:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-07 11:31:45,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 11:31:45,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:45,220 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:45,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 11:31:45,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-07-07 11:31:45,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:45,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759038486] [2020-07-07 11:31:45,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-07 11:31:45,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759038486] [2020-07-07 11:31:45,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:31:45,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 11:31:45,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43869431] [2020-07-07 11:31:45,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:31:45,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:45,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:31:45,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:31:45,427 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 11 states. [2020-07-07 11:31:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:45,876 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-07-07 11:31:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:31:45,876 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-07-07 11:31:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:45,878 INFO L225 Difference]: With dead ends: 74 [2020-07-07 11:31:45,878 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 11:31:45,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:31:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 11:31:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-07-07 11:31:45,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-07 11:31:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-07-07 11:31:45,904 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-07-07 11:31:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:45,905 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-07-07 11:31:45,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:31:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-07-07 11:31:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-07 11:31:45,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:45,913 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 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, 1, 1] [2020-07-07 11:31:45,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 11:31:45,914 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-07-07 11:31:45,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:45,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769307881] [2020-07-07 11:31:45,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:45,939 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:45,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906596551] [2020-07-07 11:31:45,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:46,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-07 11:31:46,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769307881] [2020-07-07 11:31:46,140 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:46,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906596551] [2020-07-07 11:31:46,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:46,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:31:46,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908283469] [2020-07-07 11:31:46,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:31:46,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:31:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:31:46,144 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-07-07 11:31:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:46,282 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-07-07 11:31:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:31:46,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-07-07 11:31:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:46,286 INFO L225 Difference]: With dead ends: 120 [2020-07-07 11:31:46,287 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 11:31:46,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:31:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 11:31:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-07-07 11:31:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-07 11:31:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-07-07 11:31:46,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2020-07-07 11:31:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:46,315 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-07-07 11:31:46,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:31:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-07-07 11:31:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:31:46,317 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:46,318 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:46,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:46,532 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-07-07 11:31:46,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:46,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188465742] [2020-07-07 11:31:46,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:46,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188465742] [2020-07-07 11:31:46,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-07 11:31:46,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437240711] [2020-07-07 11:31:46,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:46,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:31:46,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:31:46,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:31:46,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-07 11:31:46,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:46,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:31:46,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746154960] [2020-07-07 11:31:46,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:31:46,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:31:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:31:46,860 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-07-07 11:31:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:46,991 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-07-07 11:31:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:31:46,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-07-07 11:31:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:46,993 INFO L225 Difference]: With dead ends: 99 [2020-07-07 11:31:46,993 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:31:46,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:31:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:31:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-07-07 11:31:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:31:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-07-07 11:31:47,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-07-07 11:31:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:47,005 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-07-07 11:31:47,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:31:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-07-07 11:31:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:31:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:47,007 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:31:47,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 11:31:47,215 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-07-07 11:31:47,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:47,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853852855] [2020-07-07 11:31:47,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:47,230 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:47,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076409101] [2020-07-07 11:31:47,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:31:47,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:31:47,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:31:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-07 11:31:47,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853852855] [2020-07-07 11:31:47,377 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:31:47,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076409101] [2020-07-07 11:31:47,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:31:47,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-07 11:31:47,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722672999] [2020-07-07 11:31:47,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:31:47,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:31:47,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:31:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:31:47,385 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-07-07 11:31:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:31:47,493 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-07-07 11:31:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:31:47,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-07-07 11:31:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:31:47,498 INFO L225 Difference]: With dead ends: 94 [2020-07-07 11:31:47,498 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:31:47,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:31:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:31:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-07-07 11:31:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 11:31:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-07-07 11:31:47,519 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2020-07-07 11:31:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:31:47,522 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-07-07 11:31:47,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:31:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-07-07 11:31:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-07 11:31:47,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:31:47,523 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2020-07-07 11:31:47,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-07 11:31:47,734 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:31:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:31:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-07-07 11:31:47,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:31:47,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218221032] [2020-07-07 11:31:47,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:31:47,745 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:31:47,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755390926] [2020-07-07 11:31:47,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:48,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:31:48,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-07 11:31:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:31:48,131 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:31:48,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:31:48,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:31:48,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:31:48 BoogieIcfgContainer [2020-07-07 11:31:48,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:31:48,454 INFO L168 Benchmark]: Toolchain (without parser) took 8577.82 ms. Allocated memory was 145.2 MB in the beginning and 283.1 MB in the end (delta: 137.9 MB). Free memory was 101.6 MB in the beginning and 254.1 MB in the end (delta: -152.5 MB). Peak memory consumption was 145.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,456 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.79 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.4 MB in the beginning and 181.6 MB in the end (delta: -80.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,457 INFO L168 Benchmark]: Boogie Preprocessor took 59.41 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,462 INFO L168 Benchmark]: RCFGBuilder took 413.98 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 160.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,463 INFO L168 Benchmark]: TraceAbstraction took 7644.73 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 160.7 MB in the beginning and 254.1 MB in the end (delta: -93.4 MB). Peak memory consumption was 146.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:31:48,468 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.2 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 446.79 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 101.4 MB in the beginning and 181.6 MB in the end (delta: -80.2 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.41 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.98 ms. Allocated memory is still 202.9 MB. Free memory was 179.2 MB in the beginning and 160.7 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7644.73 ms. Allocated memory was 202.9 MB in the beginning and 283.1 MB in the end (delta: 80.2 MB). Free memory was 160.7 MB in the beginning and 254.1 MB in the end (delta: -93.4 MB). Peak memory consumption was 146.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [\old(N)=5, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2147483647, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2147483647, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=2147483647, x={2:0}] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp VAL [\old(N)=0, N=3, ret=2147483647, temp=2147483645, x={2:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2147483647, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2147483647, cnt=1, i=3, N=3, ret=2147483647, x={2:0}, x={2:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=2147483647, ret=2147483647, temp=2147483645, x={2:0}] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=2147483647, ret2=2147483647, temp=2147483646, x={2:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=2147483646, x={2:0}, x={2:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483646, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2147483646, x={2:0}, x={2:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2147483646, cnt=1, i=3, N=3, ret=2147483646, x={2:0}, x={2:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=2147483646, ret=2147483647, ret2=2147483647, temp=2147483646, x={2:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=2147483647, ret2=2147483647, ret5=2147483646, temp=2147483646, x={2:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=2147483647, ret2=2147483647, ret5=2147483646, temp=2147483646, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 380 SDslu, 557 SDs, 0 SdLazy, 954 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 566 GetRequests, 453 SyntacticMatches, 10 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 887 NumberOfCodeBlocks, 867 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 693 ConstructedInterpolants, 0 QuantifiedInterpolants, 74591 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1422 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 677/727 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...