/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:35,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:35,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:35,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:41:35,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:41:35,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:41:35,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:41:35,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:41:35,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:41:35,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:41:35,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:41:35,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:41:35,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:41:35,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:41:35,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:41:35,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:41:35,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:41:35,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:35,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:35,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:35,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:41:35,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:35,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:35,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:35,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:35,591 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:35,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:35,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:35,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:35,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:35,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:35,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:35,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:35,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:35,593 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:35,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:35,594 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:35,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:35,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:35,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:35,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:35,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:35,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:35,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:35,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:35,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:35,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:35,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:35,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:35,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:35,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:36,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:36,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:36,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:36,082 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:36,083 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:36,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-10-23 18:41:36,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c462dc5ef/368c4d0468ca43b7b261ac77a33f8e2f/FLAGd2f74835f [2020-10-23 18:41:36,772 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:36,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum05.i [2020-10-23 18:41:36,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c462dc5ef/368c4d0468ca43b7b261ac77a33f8e2f/FLAGd2f74835f [2020-10-23 18:41:37,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c462dc5ef/368c4d0468ca43b7b261ac77a33f8e2f [2020-10-23 18:41:37,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:37,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:37,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:37,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:37,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:37,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e70f18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37, skipping insertion in model container [2020-10-23 18:41:37,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:37,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:37,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:37,345 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:37,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:37,429 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:37,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37 WrapperNode [2020-10-23 18:41:37,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:37,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:37,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:37,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:37,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... [2020-10-23 18:41:37,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:37,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:37,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:37,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:37,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:37,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-10-23 18:41:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-10-23 18:41:37,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:41:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:41:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:37,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:37,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:37,640 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-10-23 18:41:37,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:37,640 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-10-23 18:41:37,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:37,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:37,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:37,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:37,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:37,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:38,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:38,159 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:38,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:38 BoogieIcfgContainer [2020-10-23 18:41:38,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:38,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:38,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:38,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:38,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:37" (1/3) ... [2020-10-23 18:41:38,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6202a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:38, skipping insertion in model container [2020-10-23 18:41:38,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:37" (2/3) ... [2020-10-23 18:41:38,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6202a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:38, skipping insertion in model container [2020-10-23 18:41:38,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:38" (3/3) ... [2020-10-23 18:41:38,171 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-10-23 18:41:38,187 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:38,194 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:38,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:38,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:38,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:38,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:38,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:38,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:38,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:38,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:38,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-23 18:41:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:41:38,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:38,276 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:38,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:38,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1268109113, now seen corresponding path program 1 times [2020-10-23 18:41:38,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:38,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769939482] [2020-10-23 18:41:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:41:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-23 18:41:38,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769939482] [2020-10-23 18:41:38,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-10-23 18:41:38,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460271363] [2020-10-23 18:41:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-23 18:41:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:41:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:38,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-23 18:41:38,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633214323] [2020-10-23 18:41:38,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-23 18:41:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-23 18:41:38,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:38,866 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2020-10-23 18:41:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:38,895 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-10-23 18:41:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-23 18:41:38,897 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2020-10-23 18:41:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:38,907 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:41:38,907 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:41:38,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:41:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-23 18:41:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:41:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-23 18:41:38,981 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 39 [2020-10-23 18:41:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:38,982 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-23 18:41:38,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-23 18:41:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-23 18:41:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:41:38,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:38,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:39,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 18:41:39,200 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:39,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash 922058561, now seen corresponding path program 1 times [2020-10-23 18:41:39,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:39,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51241534] [2020-10-23 18:41:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:39,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:39,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489982562] [2020-10-23 18:41:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-23 18:41:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:41:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51241534] [2020-10-23 18:41:39,489 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:39,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489982562] [2020-10-23 18:41:39,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:39,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062338711] [2020-10-23 18:41:39,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:39,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:39,498 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2020-10-23 18:41:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:39,559 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-10-23 18:41:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:39,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-10-23 18:41:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:39,561 INFO L225 Difference]: With dead ends: 60 [2020-10-23 18:41:39,561 INFO L226 Difference]: Without dead ends: 36 [2020-10-23 18:41:39,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-23 18:41:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-23 18:41:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:41:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-23 18:41:39,572 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 39 [2020-10-23 18:41:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:39,572 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-23 18:41:39,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-23 18:41:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 18:41:39,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:39,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:39,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:39,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:39,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1392761921, now seen corresponding path program 1 times [2020-10-23 18:41:39,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:39,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448833133] [2020-10-23 18:41:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:39,806 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:39,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230191029] [2020-10-23 18:41:39,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-23 18:41:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:41:39,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448833133] [2020-10-23 18:41:39,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:39,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230191029] [2020-10-23 18:41:39,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:39,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:39,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122904107] [2020-10-23 18:41:39,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:39,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:39,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:39,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:39,976 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-10-23 18:41:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,048 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-23 18:41:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:40,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-10-23 18:41:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,050 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:41:40,050 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:41:40,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:41:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-23 18:41:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-23 18:41:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-23 18:41:40,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 41 [2020-10-23 18:41:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,061 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-23 18:41:40,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-23 18:41:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 18:41:40,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:40,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:40,278 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,280 INFO L82 PathProgramCache]: Analyzing trace with hash -112490269, now seen corresponding path program 1 times [2020-10-23 18:41:40,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802030090] [2020-10-23 18:41:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:40,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76374693] [2020-10-23 18:41:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-23 18:41:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-23 18:41:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802030090] [2020-10-23 18:41:40,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76374693] [2020-10-23 18:41:40,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:40,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:40,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710045569] [2020-10-23 18:41:40,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:40,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,484 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 3 states. [2020-10-23 18:41:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,502 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-23 18:41:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:40,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-10-23 18:41:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,505 INFO L225 Difference]: With dead ends: 56 [2020-10-23 18:41:40,505 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:41:40,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:41:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-23 18:41:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:41:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-23 18:41:40,516 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 50 [2020-10-23 18:41:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,518 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-23 18:41:40,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:40,519 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-23 18:41:40,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 18:41:40,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,523 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:40,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:40,724 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1558860037, now seen corresponding path program 1 times [2020-10-23 18:41:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801120424] [2020-10-23 18:41:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,746 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:40,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737340446] [2020-10-23 18:41:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:40,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-23 18:41:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801120424] [2020-10-23 18:41:40,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:40,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737340446] [2020-10-23 18:41:40,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:40,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:40,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468523887] [2020-10-23 18:41:40,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:40,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:40,937 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-10-23 18:41:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:41,495 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-10-23 18:41:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:41,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-10-23 18:41:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:41,499 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:41:41,499 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:41:41,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:41,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:41:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-23 18:41:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:41:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-23 18:41:41,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 52 [2020-10-23 18:41:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:41,510 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-23 18:41:41,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-23 18:41:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 18:41:41,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:41,512 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:41,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:41,727 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash -746489758, now seen corresponding path program 1 times [2020-10-23 18:41:41,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900245376] [2020-10-23 18:41:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:41:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 18:41:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:41:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:41:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:41:41,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900245376] [2020-10-23 18:41:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919273728] [2020-10-23 18:41:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-23 18:41:42,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:42,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 8 [2020-10-23 18:41:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982788398] [2020-10-23 18:41:42,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:41:42,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:41:42,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:41:42,098 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 8 states. [2020-10-23 18:41:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:42,574 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2020-10-23 18:41:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:41:42,575 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-23 18:41:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:42,577 INFO L225 Difference]: With dead ends: 80 [2020-10-23 18:41:42,577 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:41:42,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:41:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:41:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-23 18:41:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:41:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-23 18:41:42,589 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 52 [2020-10-23 18:41:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:42,589 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-23 18:41:42,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:41:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-23 18:41:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:41:42,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:42,592 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:42,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:42,807 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 622328922, now seen corresponding path program 2 times [2020-10-23 18:41:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679336076] [2020-10-23 18:41:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:41:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 18:41:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 18:41:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 18:41:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-23 18:41:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679336076] [2020-10-23 18:41:42,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941067315] [2020-10-23 18:41:42,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:43,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:43,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-23 18:41:43,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:43,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-23 18:41:43,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573258701] [2020-10-23 18:41:43,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:41:43,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:43,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:41:43,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:43,096 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 9 states. [2020-10-23 18:41:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:43,518 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-10-23 18:41:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:41:43,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-23 18:41:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:43,522 INFO L225 Difference]: With dead ends: 87 [2020-10-23 18:41:43,522 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:41:43,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:41:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:41:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-23 18:41:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:41:43,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-23 18:41:43,541 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 63 [2020-10-23 18:41:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:43,542 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-23 18:41:43,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:41:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-23 18:41:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 18:41:43,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:43,548 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:43,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:43,758 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1145979773, now seen corresponding path program 1 times [2020-10-23 18:41:43,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:43,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762242092] [2020-10-23 18:41:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:43,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:43,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671684623] [2020-10-23 18:41:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:41:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-23 18:41:43,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762242092] [2020-10-23 18:41:43,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:43,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671684623] [2020-10-23 18:41:43,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:43,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:41:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324375371] [2020-10-23 18:41:43,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:41:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:41:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:43,956 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2020-10-23 18:41:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:43,992 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-10-23 18:41:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:43,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-23 18:41:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:43,994 INFO L225 Difference]: With dead ends: 82 [2020-10-23 18:41:43,994 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:41:43,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:41:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-23 18:41:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 18:41:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-23 18:41:44,005 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 74 [2020-10-23 18:41:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,005 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-23 18:41:44,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:41:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-23 18:41:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 18:41:44,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,007 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:44,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-10-23 18:41:44,214 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1893312699, now seen corresponding path program 2 times [2020-10-23 18:41:44,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:44,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891094987] [2020-10-23 18:41:44,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:44,244 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:44,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349232588] [2020-10-23 18:41:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:44,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:41:44,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-23 18:41:44,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891094987] [2020-10-23 18:41:44,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:44,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349232588] [2020-10-23 18:41:44,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:44,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-23 18:41:44,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021028872] [2020-10-23 18:41:44,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:44,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:44,412 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 7 states. [2020-10-23 18:41:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:44,453 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-23 18:41:44,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:44,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-10-23 18:41:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:44,456 INFO L225 Difference]: With dead ends: 83 [2020-10-23 18:41:44,456 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:41:44,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:41:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 18:41:44,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 18:41:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-23 18:41:44,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 76 [2020-10-23 18:41:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,474 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-23 18:41:44,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-23 18:41:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-23 18:41:44,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,475 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:44,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:44,689 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1474251143, now seen corresponding path program 3 times [2020-10-23 18:41:44,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:44,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155869811] [2020-10-23 18:41:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:44,704 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:44,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350277764] [2020-10-23 18:41:44,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:44,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:41:44,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:44,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-10-23 18:41:44,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155869811] [2020-10-23 18:41:44,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350277764] [2020-10-23 18:41:44,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:44,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-23 18:41:44,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016240762] [2020-10-23 18:41:44,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:41:44,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:41:44,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:44,841 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 4 states. [2020-10-23 18:41:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:44,862 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-10-23 18:41:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:41:44,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-23 18:41:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:44,864 INFO L225 Difference]: With dead ends: 76 [2020-10-23 18:41:44,864 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 18:41:44,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:41:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 18:41:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-23 18:41:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:41:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-23 18:41:44,887 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 78 [2020-10-23 18:41:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,888 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-23 18:41:44,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:41:44,888 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-23 18:41:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-23 18:41:44,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,889 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:45,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:45,103 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash -260956503, now seen corresponding path program 4 times [2020-10-23 18:41:45,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79134060] [2020-10-23 18:41:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:45,131 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:45,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783333326] [2020-10-23 18:41:45,132 INFO L93 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 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 [2020-10-23 18:41:45,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:41:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-23 18:41:45,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79134060] [2020-10-23 18:41:45,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:45,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783333326] [2020-10-23 18:41:45,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772852185] [2020-10-23 18:41:45,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:45,283 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2020-10-23 18:41:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:45,319 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-23 18:41:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:41:45,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-23 18:41:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:45,321 INFO L225 Difference]: With dead ends: 86 [2020-10-23 18:41:45,321 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:41:45,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:41:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:41:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:41:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-23 18:41:45,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 80 [2020-10-23 18:41:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:45,336 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-23 18:41:45,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-23 18:41:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 18:41:45,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:45,338 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:45,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:41:45,552 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -39230031, now seen corresponding path program 5 times [2020-10-23 18:41:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153443083] [2020-10-23 18:41:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:45,575 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:45,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257673886] [2020-10-23 18:41:45,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-10-23 18:41:45,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:45,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:45,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-23 18:41:45,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153443083] [2020-10-23 18:41:45,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:45,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257673886] [2020-10-23 18:41:45,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:45,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875287872] [2020-10-23 18:41:45,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:45,715 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 5 states. [2020-10-23 18:41:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:45,746 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-10-23 18:41:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:41:45,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-23 18:41:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:45,747 INFO L225 Difference]: With dead ends: 92 [2020-10-23 18:41:45,747 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:41:45,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:41:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:41:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:41:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-10-23 18:41:45,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 89 [2020-10-23 18:41:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-10-23 18:41:45,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-10-23 18:41:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-23 18:41:45,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:45,758 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:45,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:45,973 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,974 INFO L82 PathProgramCache]: Analyzing trace with hash 435536239, now seen corresponding path program 6 times [2020-10-23 18:41:45,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046767094] [2020-10-23 18:41:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:46,011 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:46,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658972856] [2020-10-23 18:41:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-23 18:41:47,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:41:47,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-23 18:41:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046767094] [2020-10-23 18:41:47,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:47,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658972856] [2020-10-23 18:41:47,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:47,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:47,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508735012] [2020-10-23 18:41:47,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:47,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:47,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:47,189 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 5 states. [2020-10-23 18:41:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:47,223 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2020-10-23 18:41:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:41:47,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-10-23 18:41:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:47,225 INFO L225 Difference]: With dead ends: 90 [2020-10-23 18:41:47,225 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:41:47,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:41:47,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-23 18:41:47,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-23 18:41:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-10-23 18:41:47,237 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 98 [2020-10-23 18:41:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:47,237 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-10-23 18:41:47,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-10-23 18:41:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-23 18:41:47,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:47,239 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:47,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:41:47,446 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:47,447 INFO L82 PathProgramCache]: Analyzing trace with hash -188841071, now seen corresponding path program 7 times [2020-10-23 18:41:47,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:47,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334530951] [2020-10-23 18:41:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:47,473 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:47,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991380172] [2020-10-23 18:41:47,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-10-23 18:41:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:41:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-23 18:41:47,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334530951] [2020-10-23 18:41:47,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991380172] [2020-10-23 18:41:47,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:47,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:41:47,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708368223] [2020-10-23 18:41:47,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:41:47,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:41:47,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:47,656 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 6 states. [2020-10-23 18:41:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:47,685 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-23 18:41:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:41:47,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2020-10-23 18:41:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:47,688 INFO L225 Difference]: With dead ends: 91 [2020-10-23 18:41:47,688 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 18:41:47,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 18:41:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 18:41:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 18:41:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-23 18:41:47,697 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 100 [2020-10-23 18:41:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:47,698 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-23 18:41:47,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:41:47,698 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-23 18:41:47,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 18:41:47,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:47,700 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:47,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:47,915 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:47,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:47,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1079985459, now seen corresponding path program 8 times [2020-10-23 18:41:47,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:47,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732586500] [2020-10-23 18:41:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:47,949 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369820194] [2020-10-23 18:41:47,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-23 18:41:48,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-23 18:41:48,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:48,368 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:48,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:48,458 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:48,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-23 18:41:48,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:48 BoogieIcfgContainer [2020-10-23 18:41:48,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:48,770 INFO L168 Benchmark]: Toolchain (without parser) took 11682.58 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 107.0 MB in the beginning and 141.0 MB in the end (delta: -34.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:48,770 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:48,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.91 ms. Allocated memory is still 151.0 MB. Free memory was 106.3 MB in the beginning and 96.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:48,771 INFO L168 Benchmark]: Boogie Preprocessor took 107.67 ms. Allocated memory is still 151.0 MB. Free memory was 96.3 MB in the beginning and 133.8 MB in the end (delta: -37.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:48,777 INFO L168 Benchmark]: RCFGBuilder took 621.52 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 116.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:48,778 INFO L168 Benchmark]: TraceAbstraction took 10603.20 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 115.7 MB in the beginning and 141.0 MB in the end (delta: -25.3 MB). Peak memory consumption was 42.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:48,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.91 ms. Allocated memory is still 151.0 MB. Free memory was 106.3 MB in the beginning and 96.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 107.67 ms. Allocated memory is still 151.0 MB. Free memory was 96.3 MB in the beginning and 133.8 MB in the end (delta: -37.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 621.52 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 116.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10603.20 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 115.7 MB in the beginning and 141.0 MB in the end (delta: -25.3 MB). Peak memory consumption was 42.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L42] int x[5]; VAL [x={2:0}] [L43] CALL init_nondet(x) VAL [x={2:0}] [L16] int i; [L17] i = 0 VAL [i=0, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=1, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=2, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=3, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=4, x={2:0}, x={2:0}] [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ VAL [i=5, x={2:0}, x={2:0}] [L17] COND FALSE !(i < 5) VAL [i=5, x={2:0}, x={2:0}] [L43] RET init_nondet(x) VAL [x={2:0}] [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; VAL [x={2:0}] [L49] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967289, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483644, cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L49] RET, EXPR rangesum(x) VAL [rangesum(x)=2147483644, x={2:0}] [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp VAL [ret=2147483644, temp=2147483642, x={2:0}] [L52] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483642, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483642, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967289, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483644, cnt=2, i=5, ret=4294967289, x={2:0}, x={2:0}] [L52] RET, EXPR rangesum(x) VAL [rangesum(x)=2147483644, ret=2147483644, temp=2147483642, x={2:0}] [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; VAL [i=0, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=1, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=2, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=3, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L54] COND FALSE !(i<5 -1) VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L57] x[5 -1] = temp VAL [i=4, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L58] CALL, EXPR rangesum(x) VAL [x={2:0}] [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=0, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=1, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L29] COND FALSE !(i > 5/2) VAL [cnt=0, i=2, ret=0, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=0, i=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=1, i=3, ret=2147483647, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L28] COND TRUE i < 5 VAL [cnt=1, i=4, ret=2147483647, x={2:0}, x={2:0}] [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 VAL [cnt=2, i=4, ret=4294967293, x={2:0}, x={2:0}] [L28] i++ VAL [cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L28] COND FALSE !(i < 5) VAL [cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L34] COND TRUE cnt !=0 [L35] return ret / cnt; VAL [\result=2147483646, cnt=2, i=5, ret=4294967293, x={2:0}, x={2:0}] [L58] RET, EXPR rangesum(x) VAL [i=4, rangesum(x)=2147483646, ret=2147483644, ret2=2147483644, temp=2147483646, x={2:0}] [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 VAL [i=4, ret=2147483644, ret2=2147483644, ret5=2147483646, temp=2147483646, x={2:0}] [L61] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum05.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 15, TraceHistogramMax: 15, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 126 SDslu, 797 SDs, 0 SdLazy, 306 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 972 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1187 NumberOfCodeBlocks, 1041 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1030 ConstructedInterpolants, 0 QuantifiedInterpolants, 85382 SizeOfPredicates, 12 NumberOfNonLiveVariables, 2899 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 2044/2124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...