/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:50:40,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:50:40,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:50:40,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:50:40,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:50:40,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:50:40,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:50:40,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:50:40,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:50:40,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:50:40,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:50:40,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:50:40,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:50:40,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:50:40,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:50:40,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:50:40,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:50:40,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:50:40,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:50:40,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:50:40,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:50:40,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:50:40,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:50:40,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:50:40,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:50:40,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:50:40,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:50:40,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:50:40,590 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 [2019-11-06 18:50:40,607 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:50:40,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:50:40,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:50:40,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:50:40,608 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:50:40,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:50:40,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:50:40,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:50:40,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:50:40,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:50:40,610 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:50:40,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:50:40,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:50:40,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:50:40,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:50:40,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:50:40,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:50:40,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:50:40,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:50:40,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:50:40,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:50:40,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:50:40,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:50:40,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:50:40,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:50:40,897 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:50:40,900 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:50:40,902 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:50:40,902 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:50:40,903 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-06 18:50:40,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0205e27/0676e6ffb57b4336ae0a32de1ec755ed/FLAG7bde3087f [2019-11-06 18:50:41,432 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:50:41,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-non-constant-3-u.c [2019-11-06 18:50:41,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0205e27/0676e6ffb57b4336ae0a32de1ec755ed/FLAG7bde3087f [2019-11-06 18:50:41,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db0205e27/0676e6ffb57b4336ae0a32de1ec755ed [2019-11-06 18:50:41,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:50:41,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:50:41,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:41,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:50:41,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:50:41,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:41,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510f79ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:41, skipping insertion in model container [2019-11-06 18:50:41,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:50:41" (1/1) ... [2019-11-06 18:50:41,848 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:50:41,870 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:50:42,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:42,058 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:50:42,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:50:42,187 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:50:42,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42 WrapperNode [2019-11-06 18:50:42,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:50:42,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:50:42,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:50:42,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:50:42,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (1/1) ... [2019-11-06 18:50:42,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:50:42,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:50:42,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:50:42,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:50:42,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (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 [2019-11-06 18:50:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:50:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:50:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:50:42,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:50:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:50:42,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:50:42,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:50:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:50:42,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:50:42,555 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:50:42,555 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 18:50:42,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:42 BoogieIcfgContainer [2019-11-06 18:50:42,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:50:42,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:50:42,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:50:42,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:50:42,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:50:41" (1/3) ... [2019-11-06 18:50:42,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53260389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:42, skipping insertion in model container [2019-11-06 18:50:42,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:50:42" (2/3) ... [2019-11-06 18:50:42,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53260389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:50:42, skipping insertion in model container [2019-11-06 18:50:42,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:50:42" (3/3) ... [2019-11-06 18:50:42,564 INFO L109 eAbstractionObserver]: Analyzing ICFG init-non-constant-3-u.c [2019-11-06 18:50:42,575 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:50:42,582 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:50:42,594 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:50:42,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:50:42,620 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:50:42,620 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:50:42,620 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:50:42,620 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:50:42,620 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:50:42,621 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:50:42,621 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:50:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-06 18:50:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:50:42,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:42,647 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:42,649 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1375180307, now seen corresponding path program 1 times [2019-11-06 18:50:42,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:42,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606684489] [2019-11-06 18:50:42,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:42,754 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:42,754 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914563064] [2019-11-06 18:50:42,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:42,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 18:50:42,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:42,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606684489] [2019-11-06 18:50:42,849 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:42,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914563064] [2019-11-06 18:50:42,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:42,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 18:50:42,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666758638] [2019-11-06 18:50:42,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 18:50:42,856 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 18:50:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:42,872 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-06 18:50:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:42,900 INFO L93 Difference]: Finished difference Result 54 states and 79 transitions. [2019-11-06 18:50:42,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 18:50:42,902 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-06 18:50:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:42,910 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:50:42,911 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:50:42,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:50:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:50:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:50:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:50:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-11-06 18:50:42,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2019-11-06 18:50:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:42,957 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-11-06 18:50:42,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 18:50:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-11-06 18:50:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:50:42,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:42,959 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,163 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,163 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1308846031, now seen corresponding path program 1 times [2019-11-06 18:50:43,165 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858806229] [2019-11-06 18:50:43,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,181 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,182 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390374124] [2019-11-06 18:50:43,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:43,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:43,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:43,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858806229] [2019-11-06 18:50:43,273 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:43,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390374124] [2019-11-06 18:50:43,274 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:43,274 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:50:43,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138415803] [2019-11-06 18:50:43,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:50:43,276 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:43,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:50:43,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:43,277 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2019-11-06 18:50:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:43,332 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-11-06 18:50:43,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:50:43,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:50:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:43,334 INFO L225 Difference]: With dead ends: 44 [2019-11-06 18:50:43,335 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:50:43,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:50:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:50:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-06 18:50:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:50:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-06 18:50:43,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-11-06 18:50:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:43,344 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-06 18:50:43,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:50:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-06 18:50:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:50:43,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,345 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,549 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1886649102, now seen corresponding path program 1 times [2019-11-06 18:50:43,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,551 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728343937] [2019-11-06 18:50:43,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,564 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,565 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584651496] [2019-11-06 18:50:43,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:43,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:43,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:43,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728343937] [2019-11-06 18:50:43,652 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:43,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584651496] [2019-11-06 18:50:43,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:43,652 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:43,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327693073] [2019-11-06 18:50:43,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:43,653 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:43,654 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-06 18:50:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:43,721 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-11-06 18:50:43,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:43,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-06 18:50:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:43,724 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:50:43,725 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:50:43,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:50:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2019-11-06 18:50:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:50:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-06 18:50:43,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2019-11-06 18:50:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:43,738 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-06 18:50:43,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-06 18:50:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:50:43,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:43,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:43,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:43,943 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -464275123, now seen corresponding path program 1 times [2019-11-06 18:50:43,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:43,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302011671] [2019-11-06 18:50:43,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:43,956 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:43,956 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374358075] [2019-11-06 18:50:43,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:44,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302011671] [2019-11-06 18:50:44,041 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374358075] [2019-11-06 18:50:44,042 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:50:44,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:50:44,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039181848] [2019-11-06 18:50:44,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:44,057 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:44,058 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-11-06 18:50:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,148 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-06 18:50:44,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:44,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-06 18:50:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,150 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:50:44,150 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:50:44,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:50:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-06 18:50:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:50:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-06 18:50:44,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 21 [2019-11-06 18:50:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,163 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-06 18:50:44,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-06 18:50:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:50:44,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,165 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:44,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,373 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash -727027933, now seen corresponding path program 1 times [2019-11-06 18:50:44,374 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:44,374 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341348362] [2019-11-06 18:50:44,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:44,394 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:44,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715538678] [2019-11-06 18:50:44,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:50:44,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,469 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341348362] [2019-11-06 18:50:44,469 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,470 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715538678] [2019-11-06 18:50:44,470 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:44,470 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:50:44,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080304107] [2019-11-06 18:50:44,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:50:44,471 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:50:44,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:44,472 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2019-11-06 18:50:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,538 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2019-11-06 18:50:44,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:50:44,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-06 18:50:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,540 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:50:44,540 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:50:44,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:50:44,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:50:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-11-06 18:50:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:50:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-06 18:50:44,549 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 22 [2019-11-06 18:50:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,549 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-06 18:50:44,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:50:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-06 18:50:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:50:44,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,550 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:44,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:44,756 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -282430451, now seen corresponding path program 2 times [2019-11-06 18:50:44,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:44,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342553671] [2019-11-06 18:50:44,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:44,768 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:44,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505251283] [2019-11-06 18:50:44,771 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 18:50:44,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:50:44,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:44,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:50:44,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:50:44,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342553671] [2019-11-06 18:50:44,862 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:44,862 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505251283] [2019-11-06 18:50:44,862 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:44,862 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:50:44,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635700869] [2019-11-06 18:50:44,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:50:44,863 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:50:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:44,864 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-11-06 18:50:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:44,949 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2019-11-06 18:50:44,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:50:44,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 18:50:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:44,951 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:50:44,951 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:50:44,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:50:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:50:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-06 18:50:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:50:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-06 18:50:44,960 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2019-11-06 18:50:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:44,960 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-06 18:50:44,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:50:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-06 18:50:44,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:50:44,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:44,961 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,166 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash 615189603, now seen corresponding path program 3 times [2019-11-06 18:50:45,167 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,167 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743848145] [2019-11-06 18:50:45,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,173 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621582796] [2019-11-06 18:50:45,174 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 18:50:45,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:50:45,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:45,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:50:45,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:50:45,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743848145] [2019-11-06 18:50:45,237 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:45,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621582796] [2019-11-06 18:50:45,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:45,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-06 18:50:45,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041619292] [2019-11-06 18:50:45,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:50:45,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:45,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:50:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:45,240 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2019-11-06 18:50:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,305 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2019-11-06 18:50:45,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:50:45,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-11-06 18:50:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,306 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:50:45,307 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:50:45,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:50:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:50:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2019-11-06 18:50:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:50:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2019-11-06 18:50:45,317 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 24 [2019-11-06 18:50:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,317 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2019-11-06 18:50:45,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:50:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2019-11-06 18:50:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:50:45,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,319 INFO L410 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:45,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,531 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:45,531 INFO L82 PathProgramCache]: Analyzing trace with hash 550587983, now seen corresponding path program 4 times [2019-11-06 18:50:45,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:45,531 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876816407] [2019-11-06 18:50:45,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:45,537 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:45,538 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593519936] [2019-11-06 18:50:45,538 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:45,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:50:45,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:50:45,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:50:45,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:50:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:50:45,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876816407] [2019-11-06 18:50:45,660 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:50:45,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593519936] [2019-11-06 18:50:45,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:50:45,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:50:45,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304043177] [2019-11-06 18:50:45,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:50:45,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:50:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:50:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:50:45,662 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 8 states. [2019-11-06 18:50:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:50:45,845 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2019-11-06 18:50:45,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:50:45,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-06 18:50:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:50:45,847 INFO L225 Difference]: With dead ends: 126 [2019-11-06 18:50:45,847 INFO L226 Difference]: Without dead ends: 93 [2019-11-06 18:50:45,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:50:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-06 18:50:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2019-11-06 18:50:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:50:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2019-11-06 18:50:45,873 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 33 [2019-11-06 18:50:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:50:45,873 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2019-11-06 18:50:45,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:50:45,874 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2019-11-06 18:50:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:50:45,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:50:45,879 INFO L410 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:50:46,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:50:46,082 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:50:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:50:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash -98839249, now seen corresponding path program 5 times [2019-11-06 18:50:46,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:50:46,083 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186104205] [2019-11-06 18:50:46,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:50:46,090 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:50:46,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097353860] [2019-11-06 18:50:46,090 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:12,810 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-06 18:51:12,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:12,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:51:12,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 74 proven. 52 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-06 18:51:12,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186104205] [2019-11-06 18:51:12,930 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:12,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097353860] [2019-11-06 18:51:12,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:12,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 18:51:12,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986104296] [2019-11-06 18:51:12,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:51:12,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:12,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:51:12,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:51:12,935 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 11 states. [2019-11-06 18:51:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:13,204 INFO L93 Difference]: Finished difference Result 186 states and 231 transitions. [2019-11-06 18:51:13,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:51:13,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-11-06 18:51:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:13,206 INFO L225 Difference]: With dead ends: 186 [2019-11-06 18:51:13,206 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 18:51:13,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:51:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 18:51:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 106. [2019-11-06 18:51:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-06 18:51:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2019-11-06 18:51:13,225 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 45 [2019-11-06 18:51:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:13,225 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2019-11-06 18:51:13,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:51:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2019-11-06 18:51:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:51:13,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:13,227 INFO L410 BasicCegarLoop]: trace histogram [15, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:13,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,431 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash 756330270, now seen corresponding path program 6 times [2019-11-06 18:51:13,432 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:13,432 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238337234] [2019-11-06 18:51:13,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:13,438 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:13,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886070474] [2019-11-06 18:51:13,439 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-06 18:51:13,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:13,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:51:13,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 18:51:13,658 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238337234] [2019-11-06 18:51:13,660 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:13,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886070474] [2019-11-06 18:51:13,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:13,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:51:13,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242124782] [2019-11-06 18:51:13,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:51:13,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:51:13,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:13,662 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 7 states. [2019-11-06 18:51:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:13,765 INFO L93 Difference]: Finished difference Result 223 states and 285 transitions. [2019-11-06 18:51:13,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:51:13,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-06 18:51:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:13,767 INFO L225 Difference]: With dead ends: 223 [2019-11-06 18:51:13,767 INFO L226 Difference]: Without dead ends: 129 [2019-11-06 18:51:13,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-06 18:51:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2019-11-06 18:51:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 18:51:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2019-11-06 18:51:13,798 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 51 [2019-11-06 18:51:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:13,798 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2019-11-06 18:51:13,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:51:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2019-11-06 18:51:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:51:13,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:13,802 INFO L410 BasicCegarLoop]: trace histogram [20, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,006 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1585754356, now seen corresponding path program 7 times [2019-11-06 18:51:14,007 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,008 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831448252] [2019-11-06 18:51:14,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,014 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,014 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652346841] [2019-11-06 18:51:14,014 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:14,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:51:14,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 108 proven. 10 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-11-06 18:51:14,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831448252] [2019-11-06 18:51:14,138 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:14,138 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652346841] [2019-11-06 18:51:14,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:14,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:51:14,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285423385] [2019-11-06 18:51:14,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:51:14,139 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:51:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:14,140 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand 8 states. [2019-11-06 18:51:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:14,242 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2019-11-06 18:51:14,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:51:14,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-11-06 18:51:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:14,244 INFO L225 Difference]: With dead ends: 252 [2019-11-06 18:51:14,244 INFO L226 Difference]: Without dead ends: 144 [2019-11-06 18:51:14,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-06 18:51:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2019-11-06 18:51:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-06 18:51:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2019-11-06 18:51:14,261 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 56 [2019-11-06 18:51:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:14,261 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2019-11-06 18:51:14,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:51:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2019-11-06 18:51:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:51:14,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:14,263 INFO L410 BasicCegarLoop]: trace histogram [25, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,467 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1846555298, now seen corresponding path program 8 times [2019-11-06 18:51:14,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,468 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71615392] [2019-11-06 18:51:14,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,475 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,475 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896276886] [2019-11-06 18:51:14,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,533 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:14,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:14,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:51:14,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 152 proven. 15 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-11-06 18:51:14,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71615392] [2019-11-06 18:51:14,640 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:14,640 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896276886] [2019-11-06 18:51:14,640 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:14,640 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:51:14,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816985869] [2019-11-06 18:51:14,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:51:14,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:14,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:51:14,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:14,642 INFO L87 Difference]: Start difference. First operand 136 states and 166 transitions. Second operand 9 states. [2019-11-06 18:51:14,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:14,741 INFO L93 Difference]: Finished difference Result 281 states and 355 transitions. [2019-11-06 18:51:14,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:51:14,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-11-06 18:51:14,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:14,743 INFO L225 Difference]: With dead ends: 281 [2019-11-06 18:51:14,743 INFO L226 Difference]: Without dead ends: 159 [2019-11-06 18:51:14,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-06 18:51:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2019-11-06 18:51:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-06 18:51:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 184 transitions. [2019-11-06 18:51:14,761 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 184 transitions. Word has length 61 [2019-11-06 18:51:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:14,762 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 184 transitions. [2019-11-06 18:51:14,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:51:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 184 transitions. [2019-11-06 18:51:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:51:14,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:14,763 INFO L410 BasicCegarLoop]: trace histogram [30, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:14,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,968 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash -820098380, now seen corresponding path program 9 times [2019-11-06 18:51:14,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991865468] [2019-11-06 18:51:14,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,976 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,976 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886703045] [2019-11-06 18:51:14,977 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:15,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:51:15,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:15,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:51:15,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 209 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:51:15,337 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991865468] [2019-11-06 18:51:15,338 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:15,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886703045] [2019-11-06 18:51:15,338 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:15,338 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:51:15,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817181704] [2019-11-06 18:51:15,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:51:15,339 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:51:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:15,340 INFO L87 Difference]: Start difference. First operand 151 states and 184 transitions. Second operand 10 states. [2019-11-06 18:51:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:15,469 INFO L93 Difference]: Finished difference Result 310 states and 390 transitions. [2019-11-06 18:51:15,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:51:15,471 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2019-11-06 18:51:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:15,472 INFO L225 Difference]: With dead ends: 310 [2019-11-06 18:51:15,472 INFO L226 Difference]: Without dead ends: 174 [2019-11-06 18:51:15,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-06 18:51:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2019-11-06 18:51:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-06 18:51:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2019-11-06 18:51:15,493 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 66 [2019-11-06 18:51:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:15,493 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2019-11-06 18:51:15,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:51:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2019-11-06 18:51:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:51:15,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:15,495 INFO L410 BasicCegarLoop]: trace histogram [35, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:15,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:15,699 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:15,700 INFO L82 PathProgramCache]: Analyzing trace with hash 109034398, now seen corresponding path program 10 times [2019-11-06 18:51:15,700 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:15,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061978361] [2019-11-06 18:51:15,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:15,707 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:15,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753516389] [2019-11-06 18:51:15,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:15,766 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:51:15,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:15,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:51:15,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 425 proven. 208 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-06 18:51:15,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061978361] [2019-11-06 18:51:15,893 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:15,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753516389] [2019-11-06 18:51:15,893 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:15,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-11-06 18:51:15,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218205601] [2019-11-06 18:51:15,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:51:15,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:51:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:51:15,895 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand 14 states. [2019-11-06 18:51:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:16,196 INFO L93 Difference]: Finished difference Result 369 states and 459 transitions. [2019-11-06 18:51:16,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:51:16,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-11-06 18:51:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:16,199 INFO L225 Difference]: With dead ends: 369 [2019-11-06 18:51:16,199 INFO L226 Difference]: Without dead ends: 241 [2019-11-06 18:51:16,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:51:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-06 18:51:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2019-11-06 18:51:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-11-06 18:51:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 242 transitions. [2019-11-06 18:51:16,235 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 242 transitions. Word has length 71 [2019-11-06 18:51:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:16,235 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 242 transitions. [2019-11-06 18:51:16,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:51:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 242 transitions. [2019-11-06 18:51:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 18:51:16,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:16,237 INFO L410 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:16,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:16,441 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash -552358545, now seen corresponding path program 11 times [2019-11-06 18:51:16,441 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:16,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707227029] [2019-11-06 18:51:16,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:16,450 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:16,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159839122] [2019-11-06 18:51:16,451 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true