/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/loops/matrix-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:58,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:58,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:58,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:58,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:58,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:58,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:58,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:58,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:58,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:58,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:58,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:58,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:58,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:58,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:58,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:58,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:58,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:58,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:58,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:58,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:58,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:58,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:58,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:58,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:58,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:58,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:58,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:58,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:56:58,887 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:58,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:58,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:58,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:58,891 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:58,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:58,891 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:58,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:58,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:58,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:58,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:58,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:58,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:58,894 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:58,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:58,894 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:58,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:58,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:58,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:58,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:58,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:58,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:58,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:58,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:58,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:58,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:58,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:58,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:58,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:58,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:59,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:59,186 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:59,192 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:59,193 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:59,194 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:59,194 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-1.c [2020-08-22 16:56:59,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ebe7757/6dcd062b64f44dbdaf18511f436aa012/FLAGd9a0d2d2e [2020-08-22 16:56:59,747 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:59,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-1.c [2020-08-22 16:56:59,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ebe7757/6dcd062b64f44dbdaf18511f436aa012/FLAGd9a0d2d2e [2020-08-22 16:57:00,107 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3ebe7757/6dcd062b64f44dbdaf18511f436aa012 [2020-08-22 16:57:00,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:57:00,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:57:00,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:00,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:57:00,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:57:00,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e2fff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:57:00,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:57:00,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:00,326 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:57:00,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:57:00,370 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:57:00,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00 WrapperNode [2020-08-22 16:57:00,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:57:00,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:57:00,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:57:00,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:57:00,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... [2020-08-22 16:57:00,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:57:00,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:57:00,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:57:00,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:57:00,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:57:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:57:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:57:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:57:00,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:57:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:57:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:57:00,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:57:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:57:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 16:57:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:57:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:57:00,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:57:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:57:00,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:57:00,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:57:00,854 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 16:57:00,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00 BoogieIcfgContainer [2020-08-22 16:57:00,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:57:00,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:57:00,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:57:00,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:57:00,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:57:00" (1/3) ... [2020-08-22 16:57:00,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16045ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:57:00" (2/3) ... [2020-08-22 16:57:00,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16045ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:57:00, skipping insertion in model container [2020-08-22 16:57:00,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:57:00" (3/3) ... [2020-08-22 16:57:00,866 INFO L109 eAbstractionObserver]: Analyzing ICFG matrix-1.c [2020-08-22 16:57:00,877 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:57:00,885 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:57:00,900 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:57:00,925 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:57:00,925 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:57:00,925 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:57:00,926 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:57:00,926 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:57:00,926 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:57:00,926 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:57:00,926 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:57:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 16:57:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:57:00,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:00,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:00,953 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1330517862, now seen corresponding path program 1 times [2020-08-22 16:57:00,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:00,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948807076] [2020-08-22 16:57:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,058 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:01,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069920542] [2020-08-22 16:57:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 1 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948807076] [2020-08-22 16:57:01,168 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:01,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069920542] [2020-08-22 16:57:01,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:01,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:57:01,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862504931] [2020-08-22 16:57:01,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:57:01,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:57:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:01,195 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-08-22 16:57:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,221 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-08-22 16:57:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:57:01,222 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-22 16:57:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,231 INFO L225 Difference]: With dead ends: 42 [2020-08-22 16:57:01,232 INFO L226 Difference]: Without dead ends: 17 [2020-08-22 16:57:01,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:57:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-22 16:57:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-22 16:57:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 16:57:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-08-22 16:57:01,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-08-22 16:57:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,279 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-08-22 16:57:01,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:57:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-08-22 16:57:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 16:57:01,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-08-22 16:57:01,495 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash 672047389, now seen corresponding path program 1 times [2020-08-22 16:57:01,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092063745] [2020-08-22 16:57:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,510 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:01,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067363362] [2020-08-22 16:57:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:01,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092063745] [2020-08-22 16:57:01,608 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:01,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067363362] [2020-08-22 16:57:01,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:01,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:57:01,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961187824] [2020-08-22 16:57:01,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:57:01,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:57:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:01,613 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-08-22 16:57:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:01,685 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-08-22 16:57:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:57:01,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 16:57:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:01,687 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:57:01,687 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:57:01,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:57:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:57:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-22 16:57:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:57:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-22 16:57:01,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-08-22 16:57:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:01,695 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-22 16:57:01,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:57:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-22 16:57:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 16:57:01,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:01,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:01,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,898 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash -830834987, now seen corresponding path program 1 times [2020-08-22 16:57:01,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:01,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060377706] [2020-08-22 16:57:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:01,917 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:01,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669132433] [2020-08-22 16:57:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:57:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:02,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060377706] [2020-08-22 16:57:02,032 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:02,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669132433] [2020-08-22 16:57:02,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:02,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 16:57:02,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494973541] [2020-08-22 16:57:02,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 16:57:02,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 16:57:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 16:57:02,035 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-22 16:57:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:02,087 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-08-22 16:57:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 16:57:02,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-22 16:57:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:02,088 INFO L225 Difference]: With dead ends: 32 [2020-08-22 16:57:02,088 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:57:02,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:57:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-22 16:57:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-22 16:57:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-22 16:57:02,095 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-08-22 16:57:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:02,095 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-22 16:57:02,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 16:57:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-22 16:57:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:57:02,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:02,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:02,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,312 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1529445450, now seen corresponding path program 1 times [2020-08-22 16:57:02,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:02,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219731431] [2020-08-22 16:57:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:02,323 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:02,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881430128] [2020-08-22 16:57:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:57:02,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:02,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:02,536 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:02,922 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 27 [2020-08-22 16:57:02,924 INFO L625 ElimStorePlain]: treesize reduction 400, result has 8.3 percent of original size [2020-08-22 16:57:02,924 INFO L513 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2020-08-22 16:57:02,924 INFO L513 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2020-08-22 16:57:02,925 INFO L513 ElimStorePlain]: Eliminatee v_prenex_1 vanished before elimination [2020-08-22 16:57:02,925 INFO L513 ElimStorePlain]: Eliminatee |v_#memory_int_7| vanished before elimination [2020-08-22 16:57:02,925 INFO L513 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2020-08-22 16:57:02,939 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2020-08-22 16:57:02,940 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:02,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:02,955 INFO L513 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2020-08-22 16:57:02,957 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:02,957 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 16 variables, input treesize:497, output treesize:10 [2020-08-22 16:57:02,980 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-08-22 16:57:02,982 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:02,985 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:02,985 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:02,985 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-08-22 16:57:03,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:03,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219731431] [2020-08-22 16:57:03,029 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:03,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881430128] [2020-08-22 16:57:03,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:03,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 16:57:03,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484859205] [2020-08-22 16:57:03,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:57:03,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:03,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:57:03,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:57:03,031 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-08-22 16:57:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:03,197 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-08-22 16:57:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 16:57:03,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-08-22 16:57:03,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:03,199 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:57:03,199 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 16:57:03,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:57:03,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 16:57:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-08-22 16:57:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 16:57:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-22 16:57:03,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-08-22 16:57:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:03,206 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-22 16:57:03,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:57:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-22 16:57:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 16:57:03,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:03,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:03,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:03,421 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472460, now seen corresponding path program 1 times [2020-08-22 16:57:03,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:03,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585422142] [2020-08-22 16:57:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:03,440 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:03,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281030099] [2020-08-22 16:57:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2020-08-22 16:57:03,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:03,550 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-08-22 16:57:03,551 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:03,558 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:03,560 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:03,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:7 [2020-08-22 16:57:03,599 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-08-22 16:57:03,600 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:03,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:03,604 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:03,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-08-22 16:57:03,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:03,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585422142] [2020-08-22 16:57:03,672 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:03,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281030099] [2020-08-22 16:57:03,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:03,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:57:03,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76535262] [2020-08-22 16:57:03,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:57:03,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:57:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:03,674 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-08-22 16:57:03,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:03,956 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-22 16:57:03,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:57:03,957 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-08-22 16:57:03,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:03,958 INFO L225 Difference]: With dead ends: 41 [2020-08-22 16:57:03,958 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 16:57:03,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:57:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 16:57:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-08-22 16:57:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 16:57:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-08-22 16:57:03,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 18 [2020-08-22 16:57:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:03,965 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-08-22 16:57:03,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:57:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-08-22 16:57:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 16:57:03,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:03,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:04,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:04,169 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:04,169 INFO L82 PathProgramCache]: Analyzing trace with hash -422232267, now seen corresponding path program 2 times [2020-08-22 16:57:04,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:04,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770002700] [2020-08-22 16:57:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:04,187 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:04,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816204677] [2020-08-22 16:57:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:04,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:04,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:04,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:57:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:04,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770002700] [2020-08-22 16:57:04,289 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:04,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816204677] [2020-08-22 16:57:04,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:04,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 16:57:04,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793121332] [2020-08-22 16:57:04,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:57:04,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:57:04,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:04,292 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-08-22 16:57:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:04,325 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 16:57:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:57:04,327 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-22 16:57:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:04,328 INFO L225 Difference]: With dead ends: 44 [2020-08-22 16:57:04,328 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 16:57:04,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:57:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 16:57:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 16:57:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 16:57:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-08-22 16:57:04,338 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-08-22 16:57:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:04,338 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-08-22 16:57:04,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:57:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-08-22 16:57:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:57:04,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:04,340 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:04,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:04,542 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash 239488911, now seen corresponding path program 3 times [2020-08-22 16:57:04,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:04,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589699553] [2020-08-22 16:57:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:04,551 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:04,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279228671] [2020-08-22 16:57:04,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:04,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:57:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:57:04,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:04,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:04,675 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,050 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-08-22 16:57:05,052 INFO L625 ElimStorePlain]: treesize reduction 403, result has 10.0 percent of original size [2020-08-22 16:57:05,056 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2020-08-22 16:57:05,056 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:05,070 INFO L513 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2020-08-22 16:57:05,070 INFO L513 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2020-08-22 16:57:05,071 INFO L513 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2020-08-22 16:57:05,071 INFO L513 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2020-08-22 16:57:05,071 INFO L513 ElimStorePlain]: Eliminatee v_prenex_21 vanished before elimination [2020-08-22 16:57:05,071 INFO L513 ElimStorePlain]: Eliminatee v_prenex_19 vanished before elimination [2020-08-22 16:57:05,080 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,080 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 16 variables, input treesize:513, output treesize:19 [2020-08-22 16:57:05,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:57:05,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:57:05,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:57:05,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,706 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,914 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-08-22 16:57:05,915 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:05,915 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 139 [2020-08-22 16:57:05,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:05,921 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,941 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,952 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,967 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,979 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:05,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-08-22 16:57:05,989 INFO L545 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:06,008 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 50 [2020-08-22 16:57:06,009 INFO L545 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:06,354 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-08-22 16:57:06,355 INFO L625 ElimStorePlain]: treesize reduction 115, result has 68.5 percent of original size [2020-08-22 16:57:06,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:06,393 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-08-22 16:57:06,394 INFO L244 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:1157, output treesize:204 [2020-08-22 16:57:06,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:08,620 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-08-22 16:57:08,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:08,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:08,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:08,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:08,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:08,695 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 2, 2, 1] term [2020-08-22 16:57:08,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:08,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-08-22 16:57:08,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-08-22 16:57:08,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589699553] [2020-08-22 16:57:08,733 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:08,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279228671] [2020-08-22 16:57:08,733 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected aux_mod_27 already exists [2020-08-22 16:57:08,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:08,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-08-22 16:57:08,734 ERROR L206 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-08-22 16:57:08,734 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:57:08,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:08,973 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 16:57:08,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:57:08 BoogieIcfgContainer [2020-08-22 16:57:08,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:57:08,976 INFO L168 Benchmark]: Toolchain (without parser) took 8856.81 ms. Allocated memory was 141.6 MB in the beginning and 243.3 MB in the end (delta: 101.7 MB). Free memory was 105.0 MB in the beginning and 146.6 MB in the end (delta: -41.5 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,976 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.23 ms. Allocated memory is still 141.6 MB. Free memory was 104.8 MB in the beginning and 94.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,978 INFO L168 Benchmark]: Boogie Preprocessor took 136.63 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 182.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,978 INFO L168 Benchmark]: RCFGBuilder took 348.80 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 167.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,979 INFO L168 Benchmark]: TraceAbstraction took 8114.33 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 166.5 MB in the beginning and 146.6 MB in the end (delta: 20.0 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:57:08,982 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.23 ms. Allocated memory is still 141.6 MB. Free memory was 104.8 MB in the beginning and 94.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.63 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 182.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.80 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 167.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8114.33 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 166.5 MB in the beginning and 146.6 MB in the end (delta: 20.0 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L13] unsigned int N_LIN=1; [L14] unsigned int N_COL=1; [L15] unsigned int j,k; [L16] int matriz[N_COL][N_LIN], maior; [L18] maior = __VERIFIER_nondet_int() [L19] j=0 [L19] COND TRUE j=maior [L25] EXPR matriz[j][k] [L25] maior = matriz[j][k] [L20] k++ [L20] COND FALSE !(k=maior [L25] EXPR matriz[j][k] [L25] maior = matriz[j][k] [L20] k++ [L20] COND FALSE !(k