/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/ps4-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:18,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:18,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:18,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 04:44:18,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 04:44:18,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 04:44:18,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 04:44:18,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 04:44:18,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 04:44:18,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 04:44:18,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 04:44:18,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 04:44:18,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:18,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:18,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:18,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:18,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:18,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:18,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:18,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:18,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:18,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:18,667 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:18,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:18,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 04:44:18,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 04:44:18,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 04:44:18,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 04:44:18,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 04:44:18,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 04:44:18,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 04:44:18,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 04:44:18,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 04:44:18,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 04:44:18,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 04:44:18,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 04:44:18,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 04:44:18,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 04:44:18,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:18,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:18,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:18,680 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 04:44:18,714 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:18,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:18,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:18,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:18,718 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:18,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:18,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:18,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:18,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:18,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:18,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:18,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:18,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:18,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:18,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:18,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:18,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:18,721 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:18,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:19,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:19,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:19,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:19,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:19,077 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:19,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound1.c [2021-05-06 04:44:19,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b370709a/45eb5888c5a146f2b2c511c732b41b91/FLAGbfcc597cb [2021-05-06 04:44:19,566 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:19,568 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound1.c [2021-05-06 04:44:19,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b370709a/45eb5888c5a146f2b2c511c732b41b91/FLAGbfcc597cb [2021-05-06 04:44:19,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b370709a/45eb5888c5a146f2b2c511c732b41b91 [2021-05-06 04:44:19,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:19,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:19,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:19,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:19,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:19,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db5fcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19, skipping insertion in model container [2021-05-06 04:44:19,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:19,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:19,720 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/ps4-ll_unwindbound1.c[458,471] [2021-05-06 04:44:19,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:19,740 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:19,752 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/ps4-ll_unwindbound1.c[458,471] [2021-05-06 04:44:19,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:19,770 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:19,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19 WrapperNode [2021-05-06 04:44:19,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:19,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:19,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:19,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:19,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (1/1) ... [2021-05-06 04:44:19,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:19,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:19,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:19,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:19,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (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 04:44:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:19,902 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:19,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:19,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:19,904 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:19,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:19,904 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:20,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:20,185 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:20,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:20 BoogieIcfgContainer [2021-05-06 04:44:20,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:20,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:20,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:20,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:20,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:19" (1/3) ... [2021-05-06 04:44:20,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3510509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:20, skipping insertion in model container [2021-05-06 04:44:20,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:19" (2/3) ... [2021-05-06 04:44:20,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3510509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:20, skipping insertion in model container [2021-05-06 04:44:20,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:20" (3/3) ... [2021-05-06 04:44:20,206 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound1.c [2021-05-06 04:44:20,211 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:20,214 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:20,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:20,243 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:20,243 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:20,243 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:20,243 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:20,244 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:20,244 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:20,244 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:20,244 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:20,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:20,280 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:20,281 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:20,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:20,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:20,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123305928] [2021-05-06 04:44:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:20,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:20,564 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 04:44:20,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123305928] [2021-05-06 04:44:20,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123305928] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:20,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:20,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42115607] [2021-05-06 04:44:20,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:20,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:20,586 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:20,644 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 04:44:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:20,651 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:20,652 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:20,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:20,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:20,684 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:20,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:20,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:20,686 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:20,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:20,686 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:20,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:20,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:20,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:20,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383285092] [2021-05-06 04:44:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:20,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:20,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657433722] [2021-05-06 04:44:20,709 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 04:44:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:20,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:20,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:20,868 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 04:44:20,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:20,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383285092] [2021-05-06 04:44:20,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:20,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657433722] [2021-05-06 04:44:20,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657433722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:20,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:20,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:20,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735057165] [2021-05-06 04:44:20,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:20,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:20,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:20,871 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:20,882 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:20,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:20,883 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:20,884 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:20,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:20,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:20,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:20,890 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:20,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:20,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:20,890 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:21,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:21,105 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:21,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755153590] [2021-05-06 04:44:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:21,118 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:21,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32287494] [2021-05-06 04:44:21,118 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 04:44:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:21,246 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 04:44:21,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755153590] [2021-05-06 04:44:21,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:21,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32287494] [2021-05-06 04:44:21,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32287494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:21,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:21,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:21,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959442009] [2021-05-06 04:44:21,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:21,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:21,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:21,249 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:21,304 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:21,305 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:21,305 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:21,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:21,311 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 04:44:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:21,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:21,312 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:21,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:21,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:21,313 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:21,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:21,514 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:21,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:21,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449580539] [2021-05-06 04:44:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:21,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:21,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100533744] [2021-05-06 04:44:21,523 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 04:44:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:44:21,578 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:44:21,592 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:21,619 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:44:21,620 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:44:21,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:21,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:44:21 BoogieIcfgContainer [2021-05-06 04:44:21,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:44:21,863 INFO L168 Benchmark]: Toolchain (without parser) took 2265.29 ms. Allocated memory is still 181.4 MB. Free memory was 146.7 MB in the beginning and 116.6 MB in the end (delta: 30.2 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:21,863 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 181.4 MB. Free memory was 163.3 MB in the beginning and 163.2 MB in the end (delta: 83.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:21,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.19 ms. Allocated memory is still 181.4 MB. Free memory was 146.5 MB in the beginning and 136.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:21,864 INFO L168 Benchmark]: Boogie Preprocessor took 58.86 ms. Allocated memory is still 181.4 MB. Free memory was 136.8 MB in the beginning and 165.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:21,864 INFO L168 Benchmark]: RCFGBuilder took 354.55 ms. Allocated memory is still 181.4 MB. Free memory was 165.0 MB in the beginning and 150.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:21,865 INFO L168 Benchmark]: TraceAbstraction took 1674.03 ms. Allocated memory is still 181.4 MB. Free memory was 149.9 MB in the beginning and 116.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:21,866 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 181.4 MB. Free memory was 163.3 MB in the beginning and 163.2 MB in the end (delta: 83.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 172.19 ms. Allocated memory is still 181.4 MB. Free memory was 146.5 MB in the beginning and 136.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.86 ms. Allocated memory is still 181.4 MB. Free memory was 136.8 MB in the beginning and 165.0 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 354.55 ms. Allocated memory is still 181.4 MB. Free memory was 165.0 MB in the beginning and 150.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1674.03 ms. Allocated memory is still 181.4 MB. Free memory was 149.9 MB in the beginning and 116.6 MB in the end (delta: 33.3 MB). Peak memory consumption was 34.1 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)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=2, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=2, x=0, y=0] [L27] COND TRUE counter++<1 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 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] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=2, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=2, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=2, x=1, y=1] [L27] COND FALSE !(counter++<1) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1584.0ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 19.1ms, AutomataDifference: 154.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 62 SDtfs, 12 SDslu, 88 SDs, 0 SdLazy, 41 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 34.8ms SsaConstructionTime, 97.3ms SatisfiabilityAnalysisTime, 333.2ms InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 2 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...