/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/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:41:34,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:41:34,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:41:34,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:41:34,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:41:34,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:41:34,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:41:34,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:41:34,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:41:34,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:41:34,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:41:34,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 18:41:34,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:41:34,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:41:34,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:41:34,157 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 18:41:34,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:41:34,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:41:34,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:41:34,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:41:34,221 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:41:34,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:41:34,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:41:34,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:41:34,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:41:34,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:41:34,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:41:34,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:41:34,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:41:34,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:41:34,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:41:34,225 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:41:34,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:41:34,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:41:34,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:41:34,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:41:34,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:41:34,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:41:34,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:41:34,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:41:34,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:41:34,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:41:34,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:41:34,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:41:34,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:41:34,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:41:34,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:41:34,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:41:34,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:41:34,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:41:34,769 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:41:34,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-10-23 18:41:34,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0933a760b/604b69c2103c4d40a22219db3b434fcc/FLAG496326c12 [2020-10-23 18:41:35,668 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:41:35,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-10-23 18:41:35,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0933a760b/604b69c2103c4d40a22219db3b434fcc/FLAG496326c12 [2020-10-23 18:41:35,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0933a760b/604b69c2103c4d40a22219db3b434fcc [2020-10-23 18:41:36,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:41:36,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:41:36,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:36,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:41:36,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:41:36,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60827b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36, skipping insertion in model container [2020-10-23 18:41:36,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:41:36,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:41:36,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:36,245 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:41:36,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:41:36,294 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:41:36,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36 WrapperNode [2020-10-23 18:41:36,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:41:36,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:41:36,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:41:36,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:41:36,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (1/1) ... [2020-10-23 18:41:36,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:41:36,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:41:36,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:41:36,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:41:36,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (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 18:41:36,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:41:36,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:41:36,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:41:36,447 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-10-23 18:41:36,447 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-10-23 18:41:36,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:41:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:41:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:41:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:41:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:41:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-10-23 18:41:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:41:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:41:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:41:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:41:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:41:36,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:41:37,033 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:41:37,034 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:41:37,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:37 BoogieIcfgContainer [2020-10-23 18:41:37,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:41:37,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:41:37,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:41:37,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:41:37,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:41:36" (1/3) ... [2020-10-23 18:41:37,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5e990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:37, skipping insertion in model container [2020-10-23 18:41:37,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:41:36" (2/3) ... [2020-10-23 18:41:37,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5e990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:41:37, skipping insertion in model container [2020-10-23 18:41:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:41:37" (3/3) ... [2020-10-23 18:41:37,048 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-10-23 18:41:37,062 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:41:37,068 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:41:37,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:41:37,120 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:41:37,121 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:41:37,121 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:41:37,121 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:41:37,121 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:41:37,121 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:41:37,122 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:41:37,122 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:41:37,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-23 18:41:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:41:37,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:37,154 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:37,155 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:37,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash -137461610, now seen corresponding path program 1 times [2020-10-23 18:41:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:37,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119588744] [2020-10-23 18:41:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:37,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119588744] [2020-10-23 18:41:37,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-10-23 18:41:37,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013997875] [2020-10-23 18:41:37,362 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 18:41:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:37,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-23 18:41:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-23 18:41:37,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:37,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-23 18:41:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978681865] [2020-10-23 18:41:37,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-23 18:41:37,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-23 18:41:37,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-23 18:41:37,644 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-10-23 18:41:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:37,677 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2020-10-23 18:41:37,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-23 18:41:37,679 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 40 [2020-10-23 18:41:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:37,689 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:41:37,689 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:41:37,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-23 18:41:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:41:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:41:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:41:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-23 18:41:37,747 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 40 [2020-10-23 18:41:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:37,748 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-23 18:41:37,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-23 18:41:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-23 18:41:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:41:37,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:37,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:37,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 18:41:37,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2022028587, now seen corresponding path program 1 times [2020-10-23 18:41:37,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:37,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995094773] [2020-10-23 18:41:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:37,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:37,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198343310] [2020-10-23 18:41:37,991 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 18:41:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:41:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 18:41:38,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995094773] [2020-10-23 18:41:38,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:38,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198343310] [2020-10-23 18:41:38,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:38,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:41:38,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607573456] [2020-10-23 18:41:38,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:41:38,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:41:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:41:38,150 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-10-23 18:41:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:38,174 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-10-23 18:41:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:41:38,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-10-23 18:41:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:38,178 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:41:38,179 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:41:38,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 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 18:41:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:41:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-23 18:41:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:41:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-23 18:41:38,191 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 40 [2020-10-23 18:41:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:38,192 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-23 18:41:38,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:41:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-23 18:41:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 18:41:38,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:38,194 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:38,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:38,408 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 756174570, now seen corresponding path program 1 times [2020-10-23 18:41:38,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204818347] [2020-10-23 18:41:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 18:41:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 18:41:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 18:41:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:38,628 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 18:41:38,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204818347] [2020-10-23 18:41:38,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:38,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:41:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424385799] [2020-10-23 18:41:38,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:41:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:41:38,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:38,632 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-10-23 18:41:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:39,081 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-23 18:41:39,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:41:39,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-23 18:41:39,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:39,083 INFO L225 Difference]: With dead ends: 69 [2020-10-23 18:41:39,083 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:41:39,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:41:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:41:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-23 18:41:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 18:41:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-23 18:41:39,096 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 40 [2020-10-23 18:41:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:39,096 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-23 18:41:39,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:41:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-23 18:41:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:41:39,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:39,098 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, 1] [2020-10-23 18:41:39,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:41:39,098 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:39,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1530127672, now seen corresponding path program 1 times [2020-10-23 18:41:39,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:39,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144345045] [2020-10-23 18:41:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-23 18:41:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 18:41:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 18:41:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-23 18:41:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144345045] [2020-10-23 18:41:39,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574572786] [2020-10-23 18:41:39,252 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 18:41:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:39,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:41:39,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:41:39,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2020-10-23 18:41:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173013125] [2020-10-23 18:41:39,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:41:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:39,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:41:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:39,431 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2020-10-23 18:41:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:40,371 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-10-23 18:41:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:41:40,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-23 18:41:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:40,373 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:41:40,373 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:41:40,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:41:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:41:40,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-23 18:41:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:41:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-23 18:41:40,384 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2020-10-23 18:41:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:40,384 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-23 18:41:40,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:41:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-23 18:41:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 18:41:40,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:40,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:40,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:40,602 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1229695831, now seen corresponding path program 1 times [2020-10-23 18:41:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500930593] [2020-10-23 18:41:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:41:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:41:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 18:41:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-23 18:41:40,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500930593] [2020-10-23 18:41:40,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:40,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:41:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599482118] [2020-10-23 18:41:40,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:41:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:41:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:40,887 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 6 states. [2020-10-23 18:41:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:41,234 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-23 18:41:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:41:41,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-23 18:41:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:41,252 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:41:41,252 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 18:41:41,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:41:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 18:41:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-23 18:41:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 18:41:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-23 18:41:41,262 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 53 [2020-10-23 18:41:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:41,263 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-23 18:41:41,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:41:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-23 18:41:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-23 18:41:41,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:41,264 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:41,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 18:41:41,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 226732697, now seen corresponding path program 1 times [2020-10-23 18:41:41,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:41,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826046665] [2020-10-23 18:41:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:41:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:41:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:41:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 18:41:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 18:41:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-23 18:41:41,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826046665] [2020-10-23 18:41:41,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:41:41,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 18:41:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484001690] [2020-10-23 18:41:41,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:41:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:41:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:41:41,571 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 11 states. [2020-10-23 18:41:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:42,058 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-23 18:41:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:41:42,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-23 18:41:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:42,061 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:41:42,063 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 18:41:42,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:41:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 18:41:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-23 18:41:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:41:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-10-23 18:41:42,095 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 55 [2020-10-23 18:41:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:42,095 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-10-23 18:41:42,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:41:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2020-10-23 18:41:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-23 18:41:42,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:42,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:42,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 18:41:42,104 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash -738175971, now seen corresponding path program 1 times [2020-10-23 18:41:42,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:42,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461697494] [2020-10-23 18:41:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:42,147 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:42,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591385852] [2020-10-23 18:41:42,148 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 18:41:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:41:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-23 18:41:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461697494] [2020-10-23 18:41:42,278 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:42,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591385852] [2020-10-23 18:41:42,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:42,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-23 18:41:42,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554684574] [2020-10-23 18:41:42,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 18:41:42,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:42,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 18:41:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:41:42,281 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 5 states. [2020-10-23 18:41:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:42,535 INFO L93 Difference]: Finished difference Result 96 states and 132 transitions. [2020-10-23 18:41:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:41:42,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-23 18:41:42,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:42,537 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:41:42,537 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:41:42,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 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 18:41:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:41:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-23 18:41:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 18:41:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-23 18:41:42,558 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 58 [2020-10-23 18:41:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:42,559 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-23 18:41:42,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 18:41:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-23 18:41:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 18:41:42,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:42,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:42,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:42,784 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:42,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1011308910, now seen corresponding path program 2 times [2020-10-23 18:41:42,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:42,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811063736] [2020-10-23 18:41:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:42,818 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:42,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179345417] [2020-10-23 18:41:42,820 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 18:41:43,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-23 18:41:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811063736] [2020-10-23 18:41:43,240 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179345417] [2020-10-23 18:41:43,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:43,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:41:43,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142753565] [2020-10-23 18:41:43,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:41:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:43,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:41:43,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:43,243 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 9 states. [2020-10-23 18:41:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:43,411 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2020-10-23 18:41:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:41:43,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-23 18:41:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:43,414 INFO L225 Difference]: With dead ends: 124 [2020-10-23 18:41:43,414 INFO L226 Difference]: Without dead ends: 61 [2020-10-23 18:41:43,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:41:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-23 18:41:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-23 18:41:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 18:41:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-23 18:41:43,428 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 67 [2020-10-23 18:41:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:43,428 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-23 18:41:43,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:41:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-23 18:41:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:41:43,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:43,430 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:43,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:43,643 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash -696492044, now seen corresponding path program 3 times [2020-10-23 18:41:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:43,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748107423] [2020-10-23 18:41:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:43,663 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:43,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336358082] [2020-10-23 18:41:43,664 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 18:41:43,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-23 18:41:43,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:41:43,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:43,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:41:43,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:43,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:41:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 69 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-23 18:41:43,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748107423] [2020-10-23 18:41:43,958 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:43,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336358082] [2020-10-23 18:41:43,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:43,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-23 18:41:43,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249564107] [2020-10-23 18:41:43,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:41:43,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:41:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:41:43,962 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 6 states. [2020-10-23 18:41:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:44,130 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2020-10-23 18:41:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 18:41:44,131 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-23 18:41:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:44,133 INFO L225 Difference]: With dead ends: 136 [2020-10-23 18:41:44,133 INFO L226 Difference]: Without dead ends: 92 [2020-10-23 18:41:44,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:41:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-23 18:41:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-10-23 18:41:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 18:41:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-10-23 18:41:44,208 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 69 [2020-10-23 18:41:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-10-23 18:41:44,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:41:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-10-23 18:41:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:41:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,210 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:44,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:44,429 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1346435612, now seen corresponding path program 4 times [2020-10-23 18:41:44,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:44,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480008099] [2020-10-23 18:41:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:44,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:44,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297169822] [2020-10-23 18:41:44,445 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 18:41:44,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:41:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:41:44,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:41:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 18:41:44,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480008099] [2020-10-23 18:41:44,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:44,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297169822] [2020-10-23 18:41:44,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:44,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-23 18:41:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396260] [2020-10-23 18:41:44,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:41:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:41:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:44,676 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 9 states. [2020-10-23 18:41:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:44,897 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-10-23 18:41:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:41:44,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-23 18:41:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:44,899 INFO L225 Difference]: With dead ends: 127 [2020-10-23 18:41:44,900 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 18:41:44,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:41:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 18:41:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-10-23 18:41:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-23 18:41:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2020-10-23 18:41:44,919 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 69 [2020-10-23 18:41:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:44,920 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2020-10-23 18:41:44,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:41:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2020-10-23 18:41:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:41:44,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:44,922 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, 1] [2020-10-23 18:41:45,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 18:41:45,137 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash -964903240, now seen corresponding path program 1 times [2020-10-23 18:41:45,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023716946] [2020-10-23 18:41:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:45,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:45,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125809666] [2020-10-23 18:41:45,152 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 18:41:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:41:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:41:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:41:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-23 18:41:45,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023716946] [2020-10-23 18:41:45,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-23 18:41:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125809666] [2020-10-23 18:41:45,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:41:45,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-23 18:41:45,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414463175] [2020-10-23 18:41:45,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:41:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:41:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:41:45,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:41:45,375 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand 8 states. [2020-10-23 18:41:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:41:45,515 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-10-23 18:41:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:41:45,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-23 18:41:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:41:45,521 INFO L225 Difference]: With dead ends: 147 [2020-10-23 18:41:45,521 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 18:41:45,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:41:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 18:41:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-23 18:41:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 18:41:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-10-23 18:41:45,561 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 75 [2020-10-23 18:41:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:41:45,561 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-10-23 18:41:45,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:41:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-10-23 18:41:45,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 18:41:45,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:41:45,565 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:41:45,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 18:41:45,781 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:41:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:41:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1153321990, now seen corresponding path program 2 times [2020-10-23 18:41:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:41:45,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790450869] [2020-10-23 18:41:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:41:45,826 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-23 18:41:45,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136400859] [2020-10-23 18:41:45,827 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 18:41:45,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:41:45,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-23 18:41:45,980 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:41:46,057 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:41:46,198 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:41:46,199 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:41:46,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:41:46,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:41:46 BoogieIcfgContainer [2020-10-23 18:41:46,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:41:46,548 INFO L168 Benchmark]: Toolchain (without parser) took 10539.51 ms. Allocated memory was 155.2 MB in the beginning and 243.3 MB in the end (delta: 88.1 MB). Free memory was 130.7 MB in the beginning and 194.3 MB in the end (delta: -63.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:46,549 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory was 127.0 MB in the beginning and 127.0 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:41:46,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.14 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 120.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:46,551 INFO L168 Benchmark]: Boogie Preprocessor took 51.26 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 118.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:46,551 INFO L168 Benchmark]: RCFGBuilder took 687.85 ms. Allocated memory is still 155.2 MB. Free memory was 118.4 MB in the beginning and 132.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:46,552 INFO L168 Benchmark]: TraceAbstraction took 9507.08 ms. Allocated memory was 155.2 MB in the beginning and 243.3 MB in the end (delta: 88.1 MB). Free memory was 131.6 MB in the beginning and 194.3 MB in the end (delta: -62.7 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:41:46,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory was 127.0 MB in the beginning and 127.0 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.14 ms. Allocated memory is still 155.2 MB. Free memory was 130.1 MB in the beginning and 120.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.26 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 118.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 687.85 ms. Allocated memory is still 155.2 MB. Free memory was 118.4 MB in the beginning and 132.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9507.08 ms. Allocated memory was 155.2 MB in the beginning and 243.3 MB in the end (delta: 88.1 MB). Free memory was 131.6 MB in the beginning and 194.3 MB in the end (delta: -62.7 MB). Peak memory consumption was 25.4 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: [L15] int N; VAL [\old(N)=7, N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; VAL [\old(N)=0, N=3, x={2:0}] [L46] CALL init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L17] int i; [L18] i = 0 VAL [\old(N)=0, i=0, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=1, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=2, N=3, x={2:0}, x={2:0}] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L18] COND FALSE !(i < N) VAL [\old(N)=0, i=3, N=3, x={2:0}, x={2:0}] [L46] RET init_nondet(x) VAL [\old(N)=0, N=3, x={2:0}] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; VAL [\old(N)=0, N=3, x={2:0}] [L52] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L52] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, x={2:0}] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp VAL [\old(N)=0, N=3, ret=1, temp=1, x={2:0}] [L55] CALL, EXPR rangesum(x) VAL [\old(N)=0, N=3, x={2:0}] [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=1, cnt=1, i=3, N=3, ret=1, x={2:0}, x={2:0}] [L55] RET, EXPR rangesum(x) VAL [\old(N)=0, N=3, rangesum(x)=1, ret=1, temp=1, x={2:0}] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [\old(N)=0, i=0, N=3, ret=1, ret2=1, temp=-1, x={2:0}] [L57] COND TRUE i N/2) VAL [\old(N)=0, cnt=0, i=0, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND FALSE !(i > N/2) VAL [\old(N)=0, cnt=0, i=1, N=3, ret=0, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L29] COND TRUE i < N VAL [\old(N)=0, cnt=0, i=2, N=3, ret=0, x={2:0}, x={2:0}] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [\old(N)=0, cnt=1, i=2, N=3, ret=-1, x={2:0}, x={2:0}] [L29] i++ VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [\old(N)=0, \result=-1, cnt=1, i=3, N=3, ret=-1, x={2:0}, x={2:0}] [L61] RET, EXPR rangesum(x) VAL [\old(N)=0, i=2, N=3, rangesum(x)=-1, ret=1, ret2=1, temp=-1, x={2:0}] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [\old(N)=0, i=2, N=3, ret=1, ret2=1, ret5=-1, temp=-1, x={2:0}] [L64] CALL reach_error() VAL [\old(N)=0, N=3] [L12] COND FALSE !(0) VAL [\old(N)=0, N=3] [L12] __assert_fail ("0", "rangesum.c", 17, __extension__ __PRETTY_FUNCTION__) VAL [\old(N)=0, N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.3s, OverallIterations: 12, TraceHistogramMax: 9, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 376 SDtfs, 356 SDslu, 641 SDs, 0 SdLazy, 971 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 462 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 45 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 767 NumberOfCodeBlocks, 737 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 638 ConstructedInterpolants, 0 QuantifiedInterpolants, 83080 SizeOfPredicates, 11 NumberOfNonLiveVariables, 1747 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 630/684 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...