/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 0.1.25-3af5e1f [2020-09-04 13:42:06,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:06,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:06,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:06,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:06,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:06,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:06,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:06,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:06,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:06,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:06,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:06,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:06,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:06,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:06,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:06,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:06,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:06,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:06,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:06,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:06,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:06,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:06,327 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:06,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:06,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:06,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:06,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:06,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:06,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:06,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:06,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:06,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:06,377 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:06,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:06,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:06,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:06,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:06,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:06,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:06,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:06,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:06,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:06,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:06,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:06,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:06,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:06,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:06,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:06,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:06,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:06,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:06,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:06,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:06,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:06,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:06,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:06,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:06,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:06,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:06,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:06,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:06,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:06,924 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:06,926 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-09-04 13:42:07,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ecaef35b/3c219c5a807544cc9cc60bd90aca6d3e/FLAGf9a3746a4 [2020-09-04 13:42:07,687 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:07,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-09-04 13:42:07,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ecaef35b/3c219c5a807544cc9cc60bd90aca6d3e/FLAGf9a3746a4 [2020-09-04 13:42:08,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ecaef35b/3c219c5a807544cc9cc60bd90aca6d3e [2020-09-04 13:42:08,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:08,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:08,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:08,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:08,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:08,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b2c5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08, skipping insertion in model container [2020-09-04 13:42:08,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:08,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:08,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:08,361 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:08,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:08,418 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:08,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08 WrapperNode [2020-09-04 13:42:08,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:08,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:08,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:08,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:08,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... [2020-09-04 13:42:08,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:08,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:08,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:08,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:08,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:08,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-09-04 13:42:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-09-04 13:42:08,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:08,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-09-04 13:42:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-09-04 13:42:08,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 13:42:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:09,169 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:09,169 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:09,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:09 BoogieIcfgContainer [2020-09-04 13:42:09,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:09,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:09,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:09,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:09,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:08" (1/3) ... [2020-09-04 13:42:09,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15082dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:09, skipping insertion in model container [2020-09-04 13:42:09,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:08" (2/3) ... [2020-09-04 13:42:09,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15082dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:09, skipping insertion in model container [2020-09-04 13:42:09,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:09" (3/3) ... [2020-09-04 13:42:09,193 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-09-04 13:42:09,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:09,218 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:09,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:09,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:09,274 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:09,274 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:09,274 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:09,274 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:09,274 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:09,275 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:09,275 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-09-04 13:42:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:42:09,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:09,322 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] [2020-09-04 13:42:09,323 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1377249276, now seen corresponding path program 1 times [2020-09-04 13:42:09,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:09,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562445571] [2020-09-04 13:42:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:42:09,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562445571] [2020-09-04 13:42:09,648 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-09-04 13:42:09,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253980699] [2020-09-04 13:42:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 1 conjunts are in the unsatisfiable core [2020-09-04 13:42:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:42:09,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:09,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 13:42:09,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546896471] [2020-09-04 13:42:09,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 13:42:09,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:09,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 13:42:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:09,828 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-09-04 13:42:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:09,863 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-09-04 13:42:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 13:42:09,865 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-09-04 13:42:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:09,881 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:42:09,882 INFO L226 Difference]: Without dead ends: 33 [2020-09-04 13:42:09,888 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 [2020-09-04 13:42:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-04 13:42:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-04 13:42:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:42:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-09-04 13:42:09,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 38 [2020-09-04 13:42:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:09,951 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-09-04 13:42:09,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 13:42:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-09-04 13:42:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:42:09,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:09,955 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] [2020-09-04 13:42:10,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-09-04 13:42:10,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1240892162, now seen corresponding path program 1 times [2020-09-04 13:42:10,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:10,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13516869] [2020-09-04 13:42:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:10,187 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:10,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352536708] [2020-09-04 13:42:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 13:42:10,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13516869] [2020-09-04 13:42:10,329 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:10,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352536708] [2020-09-04 13:42:10,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:10,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 13:42:10,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413457744] [2020-09-04 13:42:10,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 13:42:10,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 13:42:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 13:42:10,343 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2020-09-04 13:42:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:10,405 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-09-04 13:42:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 13:42:10,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-09-04 13:42:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:10,416 INFO L225 Difference]: With dead ends: 57 [2020-09-04 13:42:10,416 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:42:10,420 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 [2020-09-04 13:42:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:42:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-09-04 13:42:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:42:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-09-04 13:42:10,448 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 38 [2020-09-04 13:42:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:10,448 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-09-04 13:42:10,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 13:42:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-09-04 13:42:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 13:42:10,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:10,457 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] [2020-09-04 13:42:10,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:10,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1742767491, now seen corresponding path program 1 times [2020-09-04 13:42:10,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:10,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696256250] [2020-09-04 13:42:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:42:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 13:42:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-04 13:42:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:42:10,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696256250] [2020-09-04 13:42:10,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:10,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:42:10,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145270785] [2020-09-04 13:42:10,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:10,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:10,873 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2020-09-04 13:42:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:11,260 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-09-04 13:42:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:42:11,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-09-04 13:42:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:11,262 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:42:11,262 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:42:11,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:42:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:42:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-04 13:42:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 13:42:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-09-04 13:42:11,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2020-09-04 13:42:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:11,274 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-09-04 13:42:11,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-09-04 13:42:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-04 13:42:11,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:11,277 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] [2020-09-04 13:42:11,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:42:11,277 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 558201179, now seen corresponding path program 1 times [2020-09-04 13:42:11,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:11,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319750382] [2020-09-04 13:42:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-04 13:42:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 13:42:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-04 13:42:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:42:11,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319750382] [2020-09-04 13:42:11,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042043593] [2020-09-04 13:42:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:11,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 13:42:11,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:11,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-09-04 13:42:11,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725220609] [2020-09-04 13:42:11,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:11,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:11,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:11,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:11,649 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 10 states. [2020-09-04 13:42:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:12,022 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-09-04 13:42:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:42:12,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-04 13:42:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:12,025 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:42:12,026 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:42:12,027 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 [2020-09-04 13:42:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:42:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-09-04 13:42:12,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 13:42:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-09-04 13:42:12,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-09-04 13:42:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:12,039 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-09-04 13:42:12,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-09-04 13:42:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 13:42:12,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:12,041 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] [2020-09-04 13:42:12,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:12,257 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash -119064391, now seen corresponding path program 2 times [2020-09-04 13:42:12,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:12,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631958045] [2020-09-04 13:42:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:42:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-04 13:42:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 13:42:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:42:12,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631958045] [2020-09-04 13:42:12,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063503749] [2020-09-04 13:42:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:12,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-09-04 13:42:12,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-04 13:42:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-04 13:42:12,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:12,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 8 [2020-09-04 13:42:12,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352374763] [2020-09-04 13:42:12,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:12,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:12,494 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-09-04 13:42:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:12,563 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-09-04 13:42:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:12,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-09-04 13:42:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:12,566 INFO L225 Difference]: With dead ends: 65 [2020-09-04 13:42:12,566 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 13:42:12,567 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 [2020-09-04 13:42:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 13:42:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-04 13:42:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 13:42:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-09-04 13:42:12,576 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 42 [2020-09-04 13:42:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:12,577 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-09-04 13:42:12,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-09-04 13:42:12,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 13:42:12,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:12,579 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] [2020-09-04 13:42:12,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:12,793 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash -12268618, now seen corresponding path program 1 times [2020-09-04 13:42:12,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:12,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51488904] [2020-09-04 13:42:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:42:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 13:42:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-04 13:42:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-04 13:42:12,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51488904] [2020-09-04 13:42:12,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087529631] [2020-09-04 13:42:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-04 13:42:13,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:13,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 10 [2020-09-04 13:42:13,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004470547] [2020-09-04 13:42:13,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:42:13,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:13,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:42:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:13,079 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2020-09-04 13:42:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:13,433 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-09-04 13:42:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:42:13,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-09-04 13:42:13,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:13,437 INFO L225 Difference]: With dead ends: 70 [2020-09-04 13:42:13,437 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 13:42:13,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:42:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 13:42:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-04 13:42:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 13:42:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-09-04 13:42:13,454 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 51 [2020-09-04 13:42:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:13,454 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-09-04 13:42:13,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:42:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-09-04 13:42:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-04 13:42:13,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:13,459 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] [2020-09-04 13:42:13,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-04 13:42:13,678 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash 456134489, now seen corresponding path program 2 times [2020-09-04 13:42:13,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:13,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201013203] [2020-09-04 13:42:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:42:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 13:42:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 13:42:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-09-04 13:42:13,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201013203] [2020-09-04 13:42:13,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:13,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:42:13,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669033329] [2020-09-04 13:42:13,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:42:13,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:13,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:42:13,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:13,924 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 6 states. [2020-09-04 13:42:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:14,133 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-09-04 13:42:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:42:14,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-09-04 13:42:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:14,135 INFO L225 Difference]: With dead ends: 69 [2020-09-04 13:42:14,139 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 13:42:14,140 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 [2020-09-04 13:42:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 13:42:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-09-04 13:42:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 13:42:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-09-04 13:42:14,156 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 60 [2020-09-04 13:42:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:14,157 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-09-04 13:42:14,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:42:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-09-04 13:42:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-04 13:42:14,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:14,159 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] [2020-09-04 13:42:14,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 13:42:14,159 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:14,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -619650601, now seen corresponding path program 1 times [2020-09-04 13:42:14,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:14,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559738768] [2020-09-04 13:42:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 13:42:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 13:42:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 13:42:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-09-04 13:42:14,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559738768] [2020-09-04 13:42:14,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:14,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 13:42:14,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928862403] [2020-09-04 13:42:14,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:42:14,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:42:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:42:14,410 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 11 states. [2020-09-04 13:42:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:14,759 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2020-09-04 13:42:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:42:14,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-04 13:42:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:14,762 INFO L225 Difference]: With dead ends: 74 [2020-09-04 13:42:14,763 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 13:42:14,764 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 [2020-09-04 13:42:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 13:42:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-09-04 13:42:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 13:42:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-09-04 13:42:14,798 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 62 [2020-09-04 13:42:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:14,800 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-09-04 13:42:14,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:42:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-09-04 13:42:14,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 13:42:14,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:14,803 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] [2020-09-04 13:42:14,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 13:42:14,811 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1679269433, now seen corresponding path program 1 times [2020-09-04 13:42:14,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:14,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577674755] [2020-09-04 13:42:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:14,855 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:14,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921381081] [2020-09-04 13:42:14,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-09-04 13:42:15,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577674755] [2020-09-04 13:42:15,113 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:15,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921381081] [2020-09-04 13:42:15,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:15,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:42:15,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229276382] [2020-09-04 13:42:15,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:42:15,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:42:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:42:15,118 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 9 states. [2020-09-04 13:42:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:15,280 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2020-09-04 13:42:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:42:15,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-04 13:42:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:15,283 INFO L225 Difference]: With dead ends: 120 [2020-09-04 13:42:15,283 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 13:42:15,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:42:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 13:42:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-04 13:42:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-04 13:42:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-09-04 13:42:15,295 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 65 [2020-09-04 13:42:15,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:15,296 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-09-04 13:42:15,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:42:15,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-09-04 13:42:15,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 13:42:15,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:15,298 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] [2020-09-04 13:42:15,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:15,512 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:15,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2040052581, now seen corresponding path program 2 times [2020-09-04 13:42:15,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:15,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968168267] [2020-09-04 13:42:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:42:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 13:42:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-04 13:42:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:15,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-04 13:42:15,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968168267] [2020-09-04 13:42:15,708 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-09-04 13:42:15,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658259470] [2020-09-04 13:42:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:15,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:15,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:42:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:42:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-09-04 13:42:15,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:15,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 13:42:15,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020123080] [2020-09-04 13:42:15,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 13:42:15,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 13:42:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:42:15,945 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-09-04 13:42:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:16,069 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2020-09-04 13:42:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:42:16,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-09-04 13:42:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:16,072 INFO L225 Difference]: With dead ends: 99 [2020-09-04 13:42:16,072 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 13:42:16,076 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 [2020-09-04 13:42:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 13:42:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-09-04 13:42:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 13:42:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-09-04 13:42:16,087 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-09-04 13:42:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:16,087 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-09-04 13:42:16,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 13:42:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-09-04 13:42:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 13:42:16,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:16,091 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] [2020-09-04 13:42:16,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-04 13:42:16,306 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -737365673, now seen corresponding path program 1 times [2020-09-04 13:42:16,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:16,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176120581] [2020-09-04 13:42:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:16,325 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:16,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672737915] [2020-09-04 13:42:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-04 13:42:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-09-04 13:42:16,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176120581] [2020-09-04 13:42:16,463 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-09-04 13:42:16,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672737915] [2020-09-04 13:42:16,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:42:16,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 13:42:16,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877531583] [2020-09-04 13:42:16,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:42:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:42:16,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:42:16,466 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 8 states. [2020-09-04 13:42:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:16,597 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-09-04 13:42:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:42:16,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-09-04 13:42:16,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:16,600 INFO L225 Difference]: With dead ends: 94 [2020-09-04 13:42:16,601 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:42:16,602 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 [2020-09-04 13:42:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:42:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-04 13:42:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 13:42:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-09-04 13:42:16,614 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 73 [2020-09-04 13:42:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:16,615 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-09-04 13:42:16,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:42:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-09-04 13:42:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-04 13:42:16,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:16,616 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] [2020-09-04 13:42:16,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-04 13:42:16,830 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 132738585, now seen corresponding path program 2 times [2020-09-04 13:42:16,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:16,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200657485] [2020-09-04 13:42:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:16,859 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-04 13:42:16,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008873762] [2020-09-04 13:42:16,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:17,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:42:17,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-09-04 13:42:17,244 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:17,354 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:17,429 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:17,429 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:17,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:17,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:17 BoogieIcfgContainer [2020-09-04 13:42:17,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:17,725 INFO L168 Benchmark]: Toolchain (without parser) took 9689.20 ms. Allocated memory was 146.3 MB in the beginning and 285.2 MB in the end (delta: 138.9 MB). Free memory was 101.7 MB in the beginning and 245.6 MB in the end (delta: -144.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:42:17,725 INFO L168 Benchmark]: CDTParser took 1.84 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 13:42:17,726 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.61 ms. Allocated memory is still 146.3 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:17,727 INFO L168 Benchmark]: Boogie Preprocessor took 160.85 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 90.9 MB in the beginning and 180.2 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:17,728 INFO L168 Benchmark]: RCFGBuilder took 593.54 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.4 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:17,728 INFO L168 Benchmark]: TraceAbstraction took 8541.69 ms. Allocated memory was 202.9 MB in the beginning and 285.2 MB in the end (delta: 82.3 MB). Free memory was 160.7 MB in the beginning and 245.6 MB in the end (delta: -84.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:42:17,732 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.84 ms. Allocated memory is still 146.3 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 378.61 ms. Allocated memory is still 146.3 MB. Free memory was 101.5 MB in the beginning and 90.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 160.85 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 90.9 MB in the beginning and 180.2 MB in the end (delta: -89.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 593.54 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 161.4 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8541.69 ms. Allocated memory was 202.9 MB in the beginning and 285.2 MB in the end (delta: 82.3 MB). Free memory was 160.7 MB in the beginning and 245.6 MB in the end (delta: -84.9 MB). There was no memory consumed. 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)=7, N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; VAL [\old(N)=0, N=3, x={3:0}] [L35] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={3:0}] [L6] int i; [L7] i = 0 VAL [\old(N)=0, i=0, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=1, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=2, N=3, x={3:0}, x={3:0}] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [\old(N)=0, i=3, N=3, x={3:0}, x={3:0}] [L7] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={3:0}, x={3:0}] [L35] RET init_nondet(x) VAL [\old(N)=0, N=3, x={3:0}] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; VAL [\old(N)=0, N=3, x={3:0}] [L41] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={3:0}] [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={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [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=-2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L41] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2, x={3:0}] [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=-2, temp=3, x={3:0}] [L44] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={3:0}] [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={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [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=-2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=-2, cnt=1, i=3, N=3, ret=-2, x={3:0}, x={3:0}] [L44] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=-2, ret=-2, temp=3, x={3:0}] [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=-2, ret2=-2, temp=2, x={3:0}] [L46] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L19] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [L18] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={3:0}, x={3:0}] [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=2, x={3:0}, x={3:0}] [L18] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [\old(N)=0, \result=2, cnt=1, i=3, N=3, ret=2, x={3:0}, x={3:0}] [L50] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=2, ret=-2, ret2=-2, temp=2, x={3:0}] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=-2, ret2=-2, ret5=2, temp=2, x={3:0}] [L53] __VERIFIER_error() VAL [\old(N)=0, i=2, N=3, ret=-2, ret2=-2, ret5=2, temp=2, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.3s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 2.3s, 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, 1.4s 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, 0.8s SatisfiabilityAnalysisTime, 1.8s 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...