/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:00:39,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:00:39,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:00:39,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:00:39,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:00:39,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:00:39,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:00:39,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:00:39,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:00:39,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:00:39,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:00:39,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:00:39,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:00:39,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:00:39,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:00:39,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:00:39,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:00:39,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:00:39,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:00:39,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:00:39,792 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 [2021-05-06 05:00:39,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:00:39,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:00:39,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:00:39,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:00:39,810 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:00:39,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:00:39,810 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:00:39,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:00:39,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:00:39,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:00:39,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:00:39,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:00:39,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:00:39,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:00:40,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:00:40,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:00:40,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:00:40,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:00:40,098 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:00:40,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-06 05:00:40,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6116fc850/ce4b93f52fdb41578bd987d159b5afd2/FLAG3152d150c [2021-05-06 05:00:40,482 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:00:40,483 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-06 05:00:40,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6116fc850/ce4b93f52fdb41578bd987d159b5afd2/FLAG3152d150c [2021-05-06 05:00:40,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6116fc850/ce4b93f52fdb41578bd987d159b5afd2 [2021-05-06 05:00:40,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:00:40,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:00:40,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:00:40,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:00:40,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:00:40,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:00:40" (1/1) ... [2021-05-06 05:00:40,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7072d798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:40, skipping insertion in model container [2021-05-06 05:00:40,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:00:40" (1/1) ... [2021-05-06 05:00:40,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:00:40,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:00:41,010 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c[458,471] [2021-05-06 05:00:41,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:00:41,025 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:00:41,043 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c[458,471] [2021-05-06 05:00:41,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:00:41,075 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:00:41,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41 WrapperNode [2021-05-06 05:00:41,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:00:41,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:00:41,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:00:41,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:00:41,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (1/1) ... [2021-05-06 05:00:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:00:41,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:00:41,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:00:41,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:00:41,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (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 [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:00:41,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 05:00:41,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:00:41,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:00:41,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:00:41,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:00:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:00:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:00:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:00:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:00:41,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:00:41,460 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:00:41,460 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:00:41,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:00:41 BoogieIcfgContainer [2021-05-06 05:00:41,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:00:41,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:00:41,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:00:41,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:00:41,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:00:40" (1/3) ... [2021-05-06 05:00:41,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d74fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:00:41, skipping insertion in model container [2021-05-06 05:00:41,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:00:41" (2/3) ... [2021-05-06 05:00:41,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d74fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:00:41, skipping insertion in model container [2021-05-06 05:00:41,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:00:41" (3/3) ... [2021-05-06 05:00:41,466 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.c [2021-05-06 05:00:41,470 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:00:41,472 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:00:41,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:00:41,498 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:00:41,499 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:00:41,499 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:00:41,499 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:00:41,499 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:00:41,499 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:00:41,499 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:00:41,499 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:00:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:00:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:00:41,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:41,517 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:41,517 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2021-05-06 05:00:41,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:41,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207516093] [2021-05-06 05:00:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:41,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:00:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:00:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:00:41,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:41,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207516093] [2021-05-06 05:00:41,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207516093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:00:41,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:00:41,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:00:41,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010547005] [2021-05-06 05:00:41,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:00:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:00:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:00:41,777 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:00:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:00:41,963 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-05-06 05:00:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:00:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 05:00:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:00:41,970 INFO L225 Difference]: With dead ends: 50 [2021-05-06 05:00:41,971 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 05:00:41,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:00:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 05:00:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 05:00:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 05:00:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 05:00:42,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 05:00:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:00:42,007 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 05:00:42,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:00:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 05:00:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 05:00:42,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:42,008 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:42,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:00:42,008 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2021-05-06 05:00:42,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:42,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307128753] [2021-05-06 05:00:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:42,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:00:42,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740142973] [2021-05-06 05:00:42,024 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 [2021-05-06 05:00:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 05:00:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:00:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:00:42,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307128753] [2021-05-06 05:00:42,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:00:42,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740142973] [2021-05-06 05:00:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740142973] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:00:42,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:00:42,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:00:42,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584913199] [2021-05-06 05:00:42,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 05:00:42,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 05:00:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:00:42,199 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:00:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:00:42,211 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 05:00:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 05:00:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 05:00:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:00:42,212 INFO L225 Difference]: With dead ends: 34 [2021-05-06 05:00:42,213 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 05:00:42,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 05:00:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 05:00:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 05:00:42,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 05:00:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 05:00:42,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 05:00:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:00:42,218 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 05:00:42,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:00:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 05:00:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 05:00:42,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:42,219 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:42,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 05:00:42,433 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:42,434 INFO L82 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2021-05-06 05:00:42,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:42,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711751175] [2021-05-06 05:00:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:42,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:00:42,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25178243] [2021-05-06 05:00:42,442 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 [2021-05-06 05:00:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:42,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:00:42,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:00:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:00:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711751175] [2021-05-06 05:00:42,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:00:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25178243] [2021-05-06 05:00:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25178243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:00:42,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:00:42,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:00:42,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707095211] [2021-05-06 05:00:42,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:00:42,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:00:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:00:42,584 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:00:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:00:42,646 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 05:00:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:00:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 05:00:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:00:42,647 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:00:42,647 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 05:00:42,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:00:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 05:00:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 05:00:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:00:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 05:00:42,653 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 05:00:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:00:42,654 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 05:00:42,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:00:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 05:00:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 05:00:42,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:42,655 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:42,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:00:42,872 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2021-05-06 05:00:42,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:42,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936943606] [2021-05-06 05:00:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:42,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:00:42,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24188840] [2021-05-06 05:00:42,880 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 [2021-05-06 05:00:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:42,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:00:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:00:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:42,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:00:43,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936943606] [2021-05-06 05:00:43,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:00:43,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24188840] [2021-05-06 05:00:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24188840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:00:43,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:00:43,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 05:00:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398701428] [2021-05-06 05:00:43,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:00:43,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:00:43,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:00:43,110 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:00:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:00:43,164 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 05:00:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:00:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 05:00:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:00:43,166 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:00:43,166 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:00:43,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:00:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:00:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 05:00:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:00:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 05:00:43,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 05:00:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:00:43,173 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 05:00:43,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 05:00:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 05:00:43,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 05:00:43,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:43,174 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:43,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:00:43,389 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:43,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:43,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2021-05-06 05:00:43,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:43,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064703034] [2021-05-06 05:00:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:43,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:00:43,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043048300] [2021-05-06 05:00:43,398 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 [2021-05-06 05:00:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:00:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:00:43,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:00:43,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:00:43,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:43,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064703034] [2021-05-06 05:00:43,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:00:43,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043048300] [2021-05-06 05:00:43,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043048300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:00:43,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:00:43,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:00:43,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066369037] [2021-05-06 05:00:43,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:00:43,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:43,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:00:43,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:00:43,677 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:00:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:00:43,739 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-06 05:00:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:00:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 05:00:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:00:43,741 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:00:43,741 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 05:00:43,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:00:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 05:00:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 05:00:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:00:43,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 05:00:43,746 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 05:00:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:00:43,747 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 05:00:43,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:00:43,747 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 05:00:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 05:00:43,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:00:43,747 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:00:43,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:00:43,967 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:00:43,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:00:43,967 INFO L82 PathProgramCache]: Analyzing trace with hash -595737176, now seen corresponding path program 2 times [2021-05-06 05:00:43,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:00:43,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996919833] [2021-05-06 05:00:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:00:43,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:00:43,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610171828] [2021-05-06 05:00:43,975 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 [2021-05-06 05:00:44,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:00:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:00:44,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 05:00:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:00:44,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:00:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 05:00:44,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:00:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996919833] [2021-05-06 05:00:44,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:00:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610171828] [2021-05-06 05:00:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610171828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:00:44,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:00:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:00:44,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087216740] [2021-05-06 05:00:44,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:00:44,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:00:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:00:44,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:00:44,230 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:10:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:01,157 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-06 05:10:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:10:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 05:10:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:01,174 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:10:01,174 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 05:10:01,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:10:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 05:10:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-05-06 05:10:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:10:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-05-06 05:10:01,180 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2021-05-06 05:10:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:01,181 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-05-06 05:10:01,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:10:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-05-06 05:10:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 05:10:01,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:01,181 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:01,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 05:10:01,386 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2021-05-06 05:10:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:01,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147963317] [2021-05-06 05:10:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:01,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:01,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945256607] [2021-05-06 05:10:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:10:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:10:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:10:01,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:10:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:10:01,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:10:01,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147963317] [2021-05-06 05:10:01,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:10:01,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945256607] [2021-05-06 05:10:01,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945256607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:10:01,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:10:01,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:10:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397625224] [2021-05-06 05:10:01,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:10:01,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:10:01,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:10:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:10:01,650 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 05:10:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:10:01,732 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-05-06 05:10:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:10:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 05:10:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:10:01,734 INFO L225 Difference]: With dead ends: 61 [2021-05-06 05:10:01,734 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:10:01,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:10:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:10:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 05:10:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:10:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-05-06 05:10:01,740 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2021-05-06 05:10:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:10:01,740 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-05-06 05:10:01,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 05:10:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-05-06 05:10:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 05:10:01,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:10:01,741 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:10:01,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:01,959 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:10:01,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:10:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 1 times [2021-05-06 05:10:01,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:10:01,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013203456] [2021-05-06 05:10:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:10:01,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:10:01,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870949224] [2021-05-06 05:10:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 05:10:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:10:02,011 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:10:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 05:10:02,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 05:10:02,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 05:10:02,062 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 05:10:02,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:10:02,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:10:02 BoogieIcfgContainer [2021-05-06 05:10:02,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:10:02,285 INFO L168 Benchmark]: Toolchain (without parser) took 561383.41 ms. Allocated memory is still 194.0 MB. Free memory was 158.1 MB in the beginning and 101.9 MB in the end (delta: 56.2 MB). Peak memory consumption was 57.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:02,285 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 194.0 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:10:02,285 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.91 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 176.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:02,285 INFO L168 Benchmark]: Boogie Preprocessor took 41.97 ms. Allocated memory is still 194.0 MB. Free memory was 176.6 MB in the beginning and 174.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:02,285 INFO L168 Benchmark]: RCFGBuilder took 340.45 ms. Allocated memory is still 194.0 MB. Free memory was 174.8 MB in the beginning and 159.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:02,286 INFO L168 Benchmark]: TraceAbstraction took 560822.39 ms. Allocated memory is still 194.0 MB. Free memory was 159.3 MB in the beginning and 101.9 MB in the end (delta: 57.4 MB). Peak memory consumption was 58.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:10:02,286 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 194.0 MB. Free memory is still 174.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 166.91 ms. Allocated memory is still 194.0 MB. Free memory was 157.9 MB in the beginning and 176.6 MB in the end (delta: -18.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.97 ms. Allocated memory is still 194.0 MB. Free memory was 176.6 MB in the beginning and 174.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.45 ms. Allocated memory is still 194.0 MB. Free memory was 174.8 MB in the beginning and 159.8 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 560822.39 ms. Allocated memory is still 194.0 MB. Free memory was 159.3 MB in the beginning and 101.9 MB in the end (delta: 57.4 MB). Peak memory consumption was 58.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=13, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=256] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=256, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=256, x=0, y=0] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=0, counter=1, k=256, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=256, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=256, x=1, y=1] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=1, counter=2, k=256, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=256, x=33, y=2] [L28] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=256, x=33, y=2] [L28] COND FALSE !(counter++<2) [L39] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L39] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=2, counter=3, k=256, x=33, y=2] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 560765.6ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 12.4ms, AutomataDifference: 557439.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 48 SDslu, 551 SDs, 0 SdLazy, 236 SolverSat, 21 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 557149.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 272.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.3ms SsaConstructionTime, 297.6ms SatisfiabilityAnalysisTime, 944.4ms InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 587 SizeOfPredicates, 9 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 29/47 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...