/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/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:08,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:08,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:08,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:43:08,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:43:08,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:43:08,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:43:08,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:43:08,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:43:08,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:43:08,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:43:08,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:43:08,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:08,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:08,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:08,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:08,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:08,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:08,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:08,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:08,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:08,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:08,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:08,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:08,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:08,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:08,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:08,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:08,463 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 18:43:08,519 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:08,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:08,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:08,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:08,526 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:08,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:08,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:08,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:08,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:08,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:08,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:08,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:08,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:08,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:08,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:08,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:08,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:08,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:08,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:08,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:08,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:08,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:08,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:08,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:08,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:08,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:08,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:08,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:08,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:08,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:08,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:09,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:09,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:09,010 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:09,011 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:09,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-10-23 18:43:09,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83ebef2f/d483aa5c36a24a45a9e19aa2613190b8/FLAG0e880de19 [2020-10-23 18:43:09,859 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:09,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2020-10-23 18:43:09,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83ebef2f/d483aa5c36a24a45a9e19aa2613190b8/FLAG0e880de19 [2020-10-23 18:43:10,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83ebef2f/d483aa5c36a24a45a9e19aa2613190b8 [2020-10-23 18:43:10,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:10,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:10,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:10,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:10,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:10,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784d9761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10, skipping insertion in model container [2020-10-23 18:43:10,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:10,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:10,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:10,417 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:10,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:10,453 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:10,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10 WrapperNode [2020-10-23 18:43:10,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:10,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:10,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:10,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:10,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (1/1) ... [2020-10-23 18:43:10,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:10,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:10,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:10,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:10,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (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 18:43:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:10,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:10,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:10,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:10,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:10,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:10,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:11,117 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:11,117 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:11,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:11 BoogieIcfgContainer [2020-10-23 18:43:11,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:11,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:11,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:11,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:11,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:10" (1/3) ... [2020-10-23 18:43:11,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b7d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:11, skipping insertion in model container [2020-10-23 18:43:11,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:10" (2/3) ... [2020-10-23 18:43:11,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2b7d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:11, skipping insertion in model container [2020-10-23 18:43:11,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:11" (3/3) ... [2020-10-23 18:43:11,157 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-10-23 18:43:11,177 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:11,183 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:11,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:11,251 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:11,251 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:11,251 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:11,252 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:11,252 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:11,252 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:11,252 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:11,252 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:43:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:11,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:11,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:11,292 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-23 18:43:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:11,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520682787] [2020-10-23 18:43:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:11,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:11,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520682787] [2020-10-23 18:43:11,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:11,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:11,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284375366] [2020-10-23 18:43:11,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:11,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:11,627 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-23 18:43:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:11,725 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-23 18:43:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:11,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:43:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:11,736 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:43:11,736 INFO L226 Difference]: Without dead ends: 16 [2020-10-23 18:43:11,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:43:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-23 18:43:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-23 18:43:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:43:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-23 18:43:11,787 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-23 18:43:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:11,788 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-23 18:43:11,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-23 18:43:11,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:11,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:11,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:11,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:11,790 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-10-23 18:43:11,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:11,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793362417] [2020-10-23 18:43:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:11,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:11,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793362417] [2020-10-23 18:43:11,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:11,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9111706] [2020-10-23 18:43:11,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:11,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:11,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:11,960 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-23 18:43:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:12,134 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-23 18:43:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:12,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:43:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:12,136 INFO L225 Difference]: With dead ends: 26 [2020-10-23 18:43:12,137 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:43:12,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:43:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:43:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:43:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-23 18:43:12,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-23 18:43:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:12,148 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-23 18:43:12,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-23 18:43:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:12,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:12,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:12,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:12,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-23 18:43:12,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:12,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985393710] [2020-10-23 18:43:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:12,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985393710] [2020-10-23 18:43:12,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321340194] [2020-10-23 18:43:12,479 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 18:43:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:43:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:12,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:12,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:12,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-10-23 18:43:12,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433900868] [2020-10-23 18:43:12,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:43:12,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:43:12,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:43:12,732 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 15 states. [2020-10-23 18:43:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:13,066 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-23 18:43:13,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:43:13,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-10-23 18:43:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:13,068 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:43:13,068 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:43:13,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:43:13,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:43:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 18:43:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:43:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-23 18:43:13,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-23 18:43:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:13,077 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-23 18:43:13,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:43:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-23 18:43:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:43:13,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:13,078 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:13,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:43:13,292 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1260847419, now seen corresponding path program 2 times [2020-10-23 18:43:13,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:13,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845443534] [2020-10-23 18:43:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:13,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:13,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845443534] [2020-10-23 18:43:13,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375435446] [2020-10-23 18:43:13,639 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 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 18:43:13,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:13,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:43:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:13,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:13,889 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:13,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:13,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:13,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:13,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-10-23 18:43:13,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284162487] [2020-10-23 18:43:13,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:43:13,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:43:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:43:13,944 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2020-10-23 18:43:15,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:15,090 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-23 18:43:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:43:15,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2020-10-23 18:43:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:15,092 INFO L225 Difference]: With dead ends: 42 [2020-10-23 18:43:15,092 INFO L226 Difference]: Without dead ends: 28 [2020-10-23 18:43:15,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:43:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-23 18:43:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-23 18:43:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:43:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:43:15,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-10-23 18:43:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:15,102 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:43:15,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:43:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:43:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:43:15,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:15,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:15,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:15,318 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash -992390309, now seen corresponding path program 3 times [2020-10-23 18:43:15,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:15,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836888537] [2020-10-23 18:43:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:43:15,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836888537] [2020-10-23 18:43:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427892723] [2020-10-23 18:43:15,641 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 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 18:43:15,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-23 18:43:15,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-23 18:43:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:16,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:16,035 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:16,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:16,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:16,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:16,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2020-10-23 18:43:16,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664462353] [2020-10-23 18:43:16,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:43:16,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:16,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:43:16,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:43:16,109 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 24 states. [2020-10-23 18:43:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:17,993 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-23 18:43:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:43:17,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2020-10-23 18:43:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:17,998 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:43:17,998 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:43:18,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=238, Invalid=1742, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 18:43:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:43:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-23 18:43:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 18:43:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-23 18:43:18,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2020-10-23 18:43:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:18,008 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-23 18:43:18,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:43:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-23 18:43:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:43:18,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:18,009 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:18,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:18,224 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 894856061, now seen corresponding path program 1 times [2020-10-23 18:43:18,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:18,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994144894] [2020-10-23 18:43:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:18,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994144894] [2020-10-23 18:43:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464778724] [2020-10-23 18:43:18,412 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 18:43:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:18,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:43:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:18,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:18,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-23 18:43:18,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032783598] [2020-10-23 18:43:18,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:43:18,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:43:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:18,514 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-10-23 18:43:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:18,793 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-23 18:43:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:43:18,793 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-23 18:43:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:18,795 INFO L225 Difference]: With dead ends: 47 [2020-10-23 18:43:18,795 INFO L226 Difference]: Without dead ends: 37 [2020-10-23 18:43:18,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:43:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-23 18:43:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-23 18:43:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-23 18:43:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-23 18:43:18,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-23 18:43:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:18,811 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-23 18:43:18,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:43:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-23 18:43:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 18:43:18,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:18,813 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:19,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:19,027 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1497956552, now seen corresponding path program 2 times [2020-10-23 18:43:19,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:19,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029835475] [2020-10-23 18:43:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:19,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029835475] [2020-10-23 18:43:19,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359539606] [2020-10-23 18:43:19,178 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 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 18:43:19,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:43:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:19,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:19,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:43:19,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368584102] [2020-10-23 18:43:19,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:43:19,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:43:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:43:19,296 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2020-10-23 18:43:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:19,650 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 18:43:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:43:19,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-23 18:43:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:19,652 INFO L225 Difference]: With dead ends: 50 [2020-10-23 18:43:19,652 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 18:43:19,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:43:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 18:43:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-23 18:43:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:43:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-23 18:43:19,673 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2020-10-23 18:43:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:19,676 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-23 18:43:19,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:43:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-23 18:43:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 18:43:19,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:19,678 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:19,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:43:19,879 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:19,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2088668573, now seen corresponding path program 3 times [2020-10-23 18:43:19,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:19,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420502090] [2020-10-23 18:43:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:20,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420502090] [2020-10-23 18:43:20,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845822689] [2020-10-23 18:43:20,023 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 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 18:43:20,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-23 18:43:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 18:43:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:20,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:20,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-23 18:43:20,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694612171] [2020-10-23 18:43:20,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:43:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:20,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:43:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:43:20,145 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-10-23 18:43:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:20,557 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-23 18:43:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:43:20,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-23 18:43:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:20,560 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:43:20,560 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:43:20,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:43:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:43:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-23 18:43:20,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 18:43:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-23 18:43:20,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-10-23 18:43:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:20,569 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-23 18:43:20,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:43:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-23 18:43:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:43:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:20,571 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:20,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:20,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1041377560, now seen corresponding path program 4 times [2020-10-23 18:43:20,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:20,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171819917] [2020-10-23 18:43:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171819917] [2020-10-23 18:43:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196348424] [2020-10-23 18:43:20,971 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 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 18:43:21,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:43:21,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:21,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 18:43:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:21,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:43:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170280589] [2020-10-23 18:43:21,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:43:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:43:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:43:21,087 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2020-10-23 18:43:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:21,488 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-23 18:43:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:43:21,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-23 18:43:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:21,491 INFO L225 Difference]: With dead ends: 56 [2020-10-23 18:43:21,491 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:43:21,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:43:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:43:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-23 18:43:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:43:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-23 18:43:21,501 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-10-23 18:43:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:21,501 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-23 18:43:21,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:43:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-23 18:43:21,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:43:21,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:21,517 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:21,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:21,731 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:21,732 INFO L82 PathProgramCache]: Analyzing trace with hash -162752579, now seen corresponding path program 5 times [2020-10-23 18:43:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:21,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040190025] [2020-10-23 18:43:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:21,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:21,832 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:21,869 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:21,869 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:21,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 18:43:21,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:21 BoogieIcfgContainer [2020-10-23 18:43:21,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:21,962 INFO L168 Benchmark]: Toolchain (without parser) took 11780.44 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.5 MB in the beginning and 191.4 MB in the end (delta: -64.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:21,963 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:21,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.11 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:21,969 INFO L168 Benchmark]: Boogie Preprocessor took 35.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:21,970 INFO L168 Benchmark]: RCFGBuilder took 628.63 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:21,971 INFO L168 Benchmark]: TraceAbstraction took 10814.63 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 134.0 MB in the beginning and 191.4 MB in the end (delta: -57.4 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:21,976 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 122.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.11 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 116.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.40 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 628.63 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10814.63 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 134.0 MB in the beginning and 191.4 MB in the end (delta: -57.4 MB). Peak memory consumption was 9.5 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: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=10, n=0] [L24] COND TRUE i<=n VAL [i=1, n=0, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=10, n=2] [L24] i++ VAL [i=2, n=2, n=10] [L24] COND TRUE i<=n VAL [i=2, n=10, n=2] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=10, n=4] [L24] COND TRUE i<=n VAL [i=3, n=10, n=4] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=10, n=6] [L24] COND TRUE i<=n VAL [i=4, n=6, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=10, n=8] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=10, n=12] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=10, n=12] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=14, n=10] [L24] i++ VAL [i=8, n=14, n=10] [L24] COND TRUE i<=n VAL [i=8, n=10, n=14] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=16, n=10] [L24] i++ VAL [i=9, n=10, n=16] [L24] COND TRUE i<=n VAL [i=9, n=10, n=16] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=18, n=10] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=18, n=10] [L24] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.6s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 249 SDslu, 344 SDs, 0 SdLazy, 906 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=9, 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, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 42378 SizeOfPredicates, 13 NumberOfNonLiveVariables, 767 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 117/716 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...